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Replacing Your Spark Plugs and Coils - BMW 3-Series
 
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Pelican Technical Article:

Replacing Your Spark Plugs and Coils - BMW 3-Series

Nick Czerula

Time:

1 hours1 hrs

Tab:

$100

Talent:

***

Tools:

Set of sockets, 12 point spark plug socket, 5/8 thin-wall spark plug socket, flathead screwdrivers

Applicable Models:

BMW 325i Sedan (2006)
BMW 325xi Sedan/Wagon (2006)
BMW 328i Coupe/Conv (2007-13)
BMW 328i xDrive Coupe (2009-13)
BMW 328i xDrive Sedan (2009-11)
BMW 328i xDrive Wagon (2009-12)
BMW 328i/xi Sedan (2007-11)
BMW 328i/xi Wagon (2007-12)
BMW 328xi Coupe (2007-13)
BMW 330i/xi Sedan (2006)
BMW 335d/i/xi Sedan (2007-11)
BMW 335i xDrive Coupe (2009-13)
BMW 335i xDrive Sedan (2009-11)
BMW 335i/is Coupe/Conv (2007-13)
BMW 335xi Coupe (2007-13)

Parts Required:

Spark plugs, Ignitions coils

Hot Tip:

Work with a cool engine.

Performance Gain:

Engine runs well

Complementary Modification:

Change air filter at same time

Replacing the spark plugs on your BMW E90 is part of routine maintenance. BMW recommends replacing the spark plugs on E90 normally-aspirated models every 100,000 miles and turbocharged models every 45,000 miles. With all the major engine design changes over the years, spark plugs now last up to three times as long as they did in years past. This is good and bad. It means you save money and time not having to service them so frequently, but run the risk of a spark plug seizing in the cylinder head. I suggest replacing your spark plugs every three years regardless of mileage. If the last time they were serviced is unknown, replace them right away.

BMW E90 models utilize an individual ignition coil for each spark plug, referred to as coil over plug.
Figure 1

BMW E90 models utilize an individual ignition coil for each spark plug, referred to as coil over plug. (green arrows) The coil is a new design used in late model E46 and all E90 models, referred to as pencil ignition coils. This style coil no longer uses fasteners to hold it down in cylinder head, instead using a friction fit. When servicing your spark plugs, be sure the engine is cool and leave yourself about an hour to do the job. Be careful not to drop a spark plug, if you do, replace it. The spark plug insulator can crack and can lead to an engine misfire. Remove engine cover on cylinder head. See our tech article on engine cover removing.

Unlock ignition coil electrical connector by pulling tab up 90°.
Figure 2

Unlock ignition coil electrical connector by pulling tab up 90°. (green arrow)

Next slide electrical connector out of ignition coil.
Figure 3

Next slide electrical connector out of ignition coil. (green arrow)

Remove ignition coil from cylinder head by pulling straight up.
Figure 4

Remove ignition coil from cylinder head by pulling straight up. If coil resists, twist when pulling up to break free from spark plug. The ignition coil rubber boot can become stuck to spark plug over time.

You can also use a flathead screwdriver to lever coil up and out of cylinder head.
Figure 5

You can also use a flathead screwdriver to lever coil up and out of cylinder head. Be very careful using this method as coil is made of plastic and easily damages. If you find engine oil has contaminated the ignition coil boot you will have to repair the oil leak and replace ignition coil. The source of the oil leak will likely be the valve cover gasket.

Using a 5/8 thin-wall spark plug socket on a 12
Figure 6

Using a 5/8 thin-wall spark plug socket on a 12" extension, remove spark plug from cylinder head. If your spark plug does not fit into spark plug hole, you can remove the ignition coil insulator from valve cover. Use 90° tip snap ring pliers to grab insulator holes and squeeze, then pull insulator up and out of cylinder head. This is for vehicles with plastic valve covers only.

Turbo-charged models require a special spark plug socket.
Figure 7

Turbo-charged models require a special spark plug socket. The spark plug requires a 12 point socket available through Pelican Parts, part# XXXXX (BMW part# 83 30 0 495 560) Lightly lubricate new spark plugs with copper based anti-seize. Thread spark plugs into cylinder head by hand, this will prevent accidental cross-threading. Torque spark plugs to 23 Nm (18 ft-lb). Reinstall ignition coils and reconnect electrical connectors. Be sure to route wiring harness as it was before and connect ignition coil grounds. Install engine covers and check your work.

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Comments and Suggestions:
Amol Comments: The fault codes when the issue happens are P300, P302, P303, P304. 3 of them are pending codes while one of them appears as fault.
June 22, 2016
  Followup from the Pelican Staff: I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
Amol Comments: I have BMW 318i SE E90 car 2010 model. The car gives frequent misfires specially during start but it goes away as I pick up speed or restart car. It feels less powerful though specially in 1st, 2nd gears and shakes in reverse gear I am a new driver and bought this car just 1 month back. After doing some research over the internet I cam to conclusion I should replace my all 4 spark plugs and coil packs. But after reading through this blog I am bit afraid as someone said his car wouldn't start after doing same. The garage quoted me almost £200 for doing same job. I think I can get parts in £100 and do the job myself. Now based on car model can you tell me what all tools and their sizes I need to fit spark plugs. I know the spark plug sits quite deep. Also do you recommend that I should do this activity or give it to Pro?
June 22, 2016
  Followup from the Pelican Staff: We don't have your vehicle in the US, so the best i can do it tell you to use our article as a rough guide. - Nick at Pelican Parts  
duppie07 Comments: Is there an article on how to change glow plugs on a 335d?
June 4, 2016
  Followup from the Pelican Staff: We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
O.T. Comments: I have a 2008 335i that suddenly had 3 cylinders misfire 4, 5, and 6 at the same time. I changed the coils and spark plugs and the 3 cylinders are still misfiring. The car was running fine on the interstate but once I exited the interstate, the 3 cylinders started misfiring once I made my turn onto the overpass to cross the interstate. I was able to drive slowly to a relative's house about 5 miles away. Besides spark plugs and coils, what could cause this?
May 19, 2016
  Followup from the Pelican Staff: Engine compression or fuel. - Nick at Pelican Parts  
Jeet Comments: On a 2011 BMW X3 2.8i, would I tighten the spark plugs to the same 23NM 18 lb ft? Thanks for the help
May 19, 2016
  Followup from the Pelican Staff: I don’t have that info.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
MelindaE Comments: My '09 328i had a code for the 4th cylinder; determined that it is not the spark plug. The next day the car wouldn't start...dead battery. Replaced the battery and it still wouldn't start, but it did turn over and the electronics functioned. Had it towed to the dealer after letting the car sit for 3-4 weeks and they said that 3 of the cylinders are bad, so they have to replace all six for just under $1400... Is that entirely necessary? The car has 74K miles on it, so it's due for service soon and probably tires as well, so I want to be sure it's a necessary expense.
April 27, 2016
  Followup from the Pelican Staff: What exactly did they repair? I would assume it is possible and they are correct, the dealer is usually on top of the vehicle based on experience with common issues. - Nick at Pelican Parts  
Socal92845 Comments: 2008 328i back in 10/15 car suddenly had rough idle. Took it to dealer next day, ran fine. Dealer said 3 of coils show low volts recommend replacing all 6. Dealer replaced all six. a month ago same problem. Dealer said now it is the spark plugs. If I turn off the car and restart it, the symptoms go away and so does the service engine light. To me if a spark plug goes bad it will continue with the symptoms.
April 25, 2016
  Followup from the Pelican Staff: What fault codes are stored?

The misfire may be shutting off an injector to protect the cat. To determine the cause, I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts
 
Frankie Comments: I have a fault code saying that the 6th ignition coil is misfiring. I have the replacement ignition coil, but I don't know which one is the 6th ignition coil. Is it the green or yellow arrow in the attached photo?
April 12, 2016
  Followup from the Pelican Staff: green. - Nick at Pelican Parts  
Panda Comments: 2007 BMW e92 335i n54.
I just replaced my spark plugs with bosch ones, only the plugs....only one coil had some little oil on it but the spark plug was filled with oil cylinder 2 after i put everything back together...the engine started shaking..rough idle, got the code read at Autozone, cylinder 1 misfire... Cheaped out and bought coil for cylinder 1, put everything on... Car still had rough idle, and still threw the same exact code. What would you suggest the problem could be? Fuel injectors? New plug, new coil, still throwing cylinder 1 misfire code?
April 7, 2016
  Followup from the Pelican Staff: Repair the oil leak, that may be causing an issue with the coil. Likely the valve cover gasket.

If you have a misfire, I would check spark, fuel and compression on all cylinders.

Instead of autozone, Give our BMW specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
Kiyi Comments: Hi Nick, thanks for the reply. It's for a 2007 e92 328i
March 23, 2016
  Followup from the Pelican Staff: The code if for a mass air fault. Check the sensor and the intake air ducts for leaks - Nick at Pelican Parts  
Kiyi Comments: Sorry forgot to mention that the car drives fine afterwards..just the code and light is on
March 22, 2016
  Followup from the Pelican Staff: Got it, thanks. - Nick at Pelican Parts  
Kiyi Comments: Hi I replaced my plugs with new bosch fr7npp332. The car starts then quickly hunts rpm then dies. If I gas it during start it stays on but rpm hunts for a while at idle until I gas it again. Oddly the rpm surges maybe 2-300 when I press on the brake but this goes away after warm up about a minute. Car is throwing P116E. I tried swapping the old plugs back and same problem. This wasn't there before the change. I double checked gap and proper seating of coils.
March 22, 2016
  Followup from the Pelican Staff: You didn't mention what vehicle you are working on, so I can't be too specific. The code if for a mass air fault. Check the sensor and the intake air ducts for leaks. - Nick at Pelican Parts  
cj Comments: What about changing the coil on cyl 4. Its tiggggght against that pertruding part. Does that have to be removed forst. Afraid could damage the boot when pulling out. Treat as all the others or is there step with that iron part first which is snugggg against it.
March 12, 2016
  Followup from the Pelican Staff: They always come out for me, without removing the Valvetronic motor. You should have room. - Nick at Pelican Parts  
NewbWrencher Comments: Can I get away with getting the plugs with only a 3" extension? Or is larger necessary?
March 7, 2016
  Followup from the Pelican Staff: It depends on your socket length. - Nick at Pelican Parts  
chgoyri Comments: Hi, can you please share the cylinder numeric sequence?
which one is the first? Rariador end or cockpit end?

thanks
March 4, 2016
  Followup from the Pelican Staff: Front of engine, radiator, cylinder 1 - 6 ending at firewall. - Nick at Pelican Parts  
Ed Comments: I recently had the valve cover gasket replaced because of an oil leak, I've noticed that my car vibrates more noticeably during idle, RPMs do not oscillate. I suspect that there is oil mixing with the spark plugs, and that's what's causing the vibrations, probably bad ignition coils? What do you think?
February 29, 2016
  Followup from the Pelican Staff: What makes you think oil is getting to the spark plugs? Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
SoFlo Bimmer Comments: I want to replace my plugs and coils on a 2009 BMW 328ix. I was going to purchase a 12 point, 14mm, thin wall, 3/8 socket, but was told that it won't fit my car. What socket do I need for this job? Thanks.
January 29, 2016
  Followup from the Pelican Staff: A regular spark plug socket. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.

12 point is for turbocharged engines.
- Nick at Pelican Parts
 
maker Comments: Hi I have 1996 BMW 318imy coil supply is always hot after 30 minutes drive and then after cooling down the temp is normal .
And behind park sign on the clock there is yellow sign when its hot and when is coil it dissapears and start.what can I do? Please help
January 25, 2016
  Followup from the Pelican Staff: By hot do you mean powered up? - Nick at Pelican Parts  
Raul Comments: Amazing guide! You guys helped me get back on the road. However i have small concern.

I own a 328i 2007 e90. I replaced the spark plugs with BOSCH FR7NPP332 torqued to 25ft-lbs lowest setting i have. I replaced the ignition coils with DELPHI GN10328. After replacement, the ECU reports no more misfires. However, I noticed that there was oil present in cylinder 3 on the spark plug. Additionally, there was oil pools next to the ignition coil on cylinders 3 and 4. This was an oil puddle near the wires. I've read online and it seems i need to replace the valve cover gasket. Any thoughts?

History:
No prior history, car was salvaged.
Last oil change was 70k. Current mileage is 80k
Car said i was one quart low at 79k i added on oil
Misfires on cylinders 3 and 6 at 80k
Ignition coils and spark plugs replaced at 80k

http://imgur.com/0c1Ciz6 - Spark plug that had oil
http://imgur.com/aORZVEM - Oil where spark plug was
http://imgur.com/kmzO4Wn - that black areas are where the oil pools are. Very likely oil. I can go and tripple check tomorrow.


Many thanks!
January 18, 2016
  Followup from the Pelican Staff: I would bet it is only the valve cover gasket you need to replace. Most times if causes the leaks you have. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
AJ Comments: I have a 2011 328xi with 28,000 miles and the Service Engine Soon light came on. The error code is cylinder 3 misfire with rough idling and shacking. I noticed that the misfire, after clearing the error code, reoccurred at higher speed 60 miles/hour. My question is, how do in know which of the cylinders is #3? How can I isolate the issue to determine if it is coil related or spark plug related?
January 12, 2016
  Followup from the Pelican Staff: Cyl 3 is the third one from the front of the engine. To dtermine what is misfiring, check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
Peter Comments: Do i need to remove my battery wire connection when replacing new spark plug and coil for my 328i 2008?
December 27, 2015
  Followup from the Pelican Staff: It is not necessary, but not a bad idea. - Nick at Pelican Parts  
mffaprez Comments: Just replaced all coils and plugs with bosch after having the cold start idle shakes. Now car cranks but wont start. Was very deliberate and careful not to accidentally disconnect any peripheral parts. Went back and triple checked and cant find anything ive missed. HELP
December 7, 2015
  Followup from the Pelican Staff: I would assume a connector or two was left unplugged.

I can't help without knowing what is missing from the system when you are trying to start it. When your engine doesn’t start you’ll want to check the basics. Check spark, fuel injector pulse and fuel pressure, volume, quality and engine compression. Are there any fault codes? Once you figure out what is missing, it will be easier to diagnose.
- Nick at Pelican Parts
 
Mark Comments: I have 07 335i e93 reading other posts there is talk about resetting settings on management system after changing plugs or having idle issues? Am concerned that its not as simple as changing plug, comments?
November 22, 2015
  Followup from the Pelican Staff: Replacing spark plugs is cut and dry. No programming required. - Nick at Pelican Parts  
Eska Comments: I have a 2011 328i Xdrive and have reached 111,000 KMs. I purchased Bosch FR7NPP332 spark plugs and coils since I've already encountered two separate issues with existing coils. I plan to purchase a torque wrench and want to know what torque needs to be applied when installing the spark plug.
November 4, 2015
  Followup from the Pelican Staff:
I don’t have that info.
.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-310-626-8765- Nick at Pelican Parts
 
Bob Comments: Thank you for your quick response! When the plugs are replaced is there a code to clear indicating the change?
September 22, 2015
  Followup from the Pelican Staff: See this tech article for service basics and restting indicators:
http://www.pelicanparts.com/BMW/techarticles/BMW-3-Series-E90/BASICS-Condition_Based_Service_Explained/BASICS-Condition_Based_Service_Explained.htm - Nick at Pelican Parts
 
Bob Comments: what is the recommended mileage to replace the spark plugs in a 2009 328ix? we have around 74,000 on it now. Thank you
September 21, 2015
  Followup from the Pelican Staff: BMW recommends replacing the spark plugs on E90 normally-aspirated models every 100,000 miles and turbocharged models every 45,000 miles. - Nick at Pelican Parts  
Handlingit Comments: Do I need to replace the ignition coils while doing the spark plugs? Went to BMW dealership and I am almost due to have to change spark plugs. They want about $500 for this, does this include ignition coils usually? I have a 328i, 2009. Also, do I need that long 12"extension tool or is there another way to grab the spark plug out? How many spark plugs do I need? Thank you!
August 19, 2015
  Followup from the Pelican Staff: If you are not having a problem with the coils, no you do not. - Nick at Pelican Parts  
Robbo21 Comments: I've a 2009 325i a/t sedan 119 000km , everytime i do hard acceleration the engine starts vibrating, shaking emanating from the front & feels like it's braking On the front wheels & on idle i hear boom boom sounds from the engine, but if i accelerate gently the car moves smoothly & quietly.can it be plugs or warn out engine mountings ?
August 12, 2015
  Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
johnny Comments: i have a 2007 328i. my car just started shaking and vibrating when i'm idling, reverse, at a stop light.
Do i need to replace all 6 spark plugs and ignition coils? or just the spark plugs?
July 21, 2015
  Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Tyler Comments: I have a 2011 e90 335/N55. I've seen you tube videos showing the strut brace must be removed to remove the last engine cover and access the spark plugs. Is that correct or is there an easier way? Thanks.
July 13, 2015
  Followup from the Pelican Staff: No, the strut brace has to come off.

UNLESS: you can fit your hand with a bit under the cowl to unlock the fastener. - Nick at Pelican Parts
 
tarun Comments: Hi, I tried changing the spark plugs, I got through cylinder 1,2,3 however, the number 4,5, and 6 were super tight...I couldn't twist them using full muscle strength. Is there any solution to this? What should I do in this situation? Also my 07 328i is at 90K miles now is it time to replace the coils as well? or I should just change the plugs and be good to go ?
June 12, 2015
  Followup from the Pelican Staff: You can try letting some penetrating oil soak on the plugs. Then give it another try. - Nick at Pelican Parts  
Gin Comments: I have an "service engine soon" on and the spark plugs are still not change. When i put the throtte to my car up to 3000 rpm the engine is shaking. My car is 2007 bmw 335i. So the problem is spark plugs or others?
June 12, 2015
  Followup from the Pelican Staff: Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
kingdavid Comments: Which spark plugs and coils do you recommend for a 330 I BMW?
June 2, 2015
  Followup from the Pelican Staff: What year? usually a BMW coil and an NGK plug is fine. But I would need to know specifics. For answers on specific parts, Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
matt Comments: Thnx a lot Nick. I changed the spark plugs and the car moves pretty good and the fuel consumption is pretty low. I appreciate ur help. Keep it up. It was a DIY job n i saved unnecessary labour expense.
June 1, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
matt Comments: And lastly which spark plugs do you recommend for 2006 e90 320i, and how many are they?
May 29, 2015
  Followup from the Pelican Staff: NGK plugs are good. There are 6. Give our parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
matt Comments: The yellow engine light is on. I had just arranged an extended motor warranty plan sincewell the cost of service is high, and this will take me 3 premiums before the first repair claim. In the meantime I will try to get all the spark plugs changed by an independent dealer and see if there is positive results. Thanx Nick
May 29, 2015
  Followup from the Pelican Staff: Thanks for the follow up. We appreciate it.
- Nick at Pelican Parts
 
matt Comments: Hi. My 2006 e90 320i is fluctuating up and down during hiddling. It also have a rattling sound during start up. And when driving it, the engine drops to about 20 and 40 km per hour on an uphill road. Engine loses power. I changed petrol pump but the broblem is still there. Any idea. The car is 110 000 km.
May 28, 2015
  Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Ryven Comments: 2006 BMW 330i. The Car definitely start but after a little while the engine consecutively shakes. Please help us.
May 9, 2015
  Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Andy Comments: I have a 2006 325i with 74k miles on it. I just changed my spark plug yesterday. I found out that there is some oil in spark plug well 3 and 4. The others have no oil. Is it a gasket leak? But the sensor never tell me to add oil. I usually change oil every 5000 miles. Thanks
April 17, 2015
  Followup from the Pelican Staff: I would suspect the valve cover gasket. - Nick at Pelican Parts  
John Comments: My 2011 E90 is throwing ODBII codes P0302 and P1384. The BMW service center is only seeing the code related to cyclinder 2 misfire P0302 and are claiming replacing all the coils will take care of the rough idle/sluggish performance issues I am experiencing. They also recommend replacing all coils/wires instead of just cylinder 2. Any guidance is appreciated.
March 19, 2015
  Followup from the Pelican Staff: How many miles are on your car? How does the idle seem? If the car runs rough like a single cylinder misfire you could just replace one coil, in fact that is a common thing to do. Make sure they check the spark plugs. If your car is a turbo you should do them every 30K miles, non-turbo 60K miles. - Casey at Pelican Parts  
Lucas Comments: I heva changed the spark plug on my 335 2008 and noticed that the plug #6 was a bit wet electrode and the was also a bit of oil on the the base of the plug holes of cylinders 5-6. I know that oil in the hole is a gasket leak and a fairly easy job buy what about having oil deposits on the electrode itself?!? Is it going for a complete engine rebuilt??

Thaks for the help
March 7, 2015
  Followup from the Pelican Staff: Which cylinders had the oil on the electrode? If 5 and 6 I'd bet the oil ran down when removing the plugs. Have you been having to add engine oil and if so how frequently. Unless there is an oil consumption issue I would not worry too much. - Casey at Pelican Parts  
Will Comments: Hi I have a 06 325i 3.0 over 100 thousand miles car is cranking but not turning on I figure the spark plugs but idk what kind I should use I dnt have the owner manual but it would help me a lot if u help me or suggest what I can use Or I can use . ? Thank u
October 29, 2014
  Followup from the Pelican Staff: I can't help without knowing what is missing from the system when you are trying to start it. When your engine doesn’t start you’ll want to check the basics. Check spark, fuel injector pulse and fuel pressure, volume and quality. Are there any fault codes? Once you figure out what is missing, it will be easier to diagnose.
- Nick at Pelican Parts
 
bizwhit Comments: I would add a note for the last step: "Be sure that the plugs to the coil is fully connected. The new coil will fit really tight with the plug so you'll need to use some considerable force to fully seat the plug." My plug was not tight enough by maybe 1mm and the car wouldn't start.
September 22, 2014
  Followup from the Pelican Staff: Good call. I like to press down on the coil, listen for the snap of the engagement. - Nick at Pelican Parts  
jack Comments: bmw 320i e90 if one coil going bad,do i have to replace all
coil,thanks
September 9, 2014
  Followup from the Pelican Staff: No, but it is not bad idea to do so. - Nick at Pelican Parts  
Drewmon Comments: FWIW - I purchased a set of Bosch coils from the local BMW dealer today at the commercial parts counter where I am pretty tight with the crew knew a few guys from other jobs over the years. They report BMW appears to be switching to the Delphi coils, and noted it must be a product quality issue as that's when they normally witness migrations between suppliers. Bosch is still available, but BMW recommends moving to the Delphi where possible. Price is equivocally the same in the system for either type.
August 18, 2014
  Followup from the Pelican Staff: Thanks for the additional info. We appreciate it.
- Nick at Pelican Parts
 
Lo Kev Comments: To Beefeater & Pelican. I've a 2006 325i, and I've replaced all the ignition coils with the OEM Bosch coils grey color and NGK plugs. I also noticed the problem you've describe, looks like it is not making a tight contact with the plugs electrodes. The original ones snapped in the plugs with solid contact. Just wondering if there is an updated version of the spark plugs for these coils?
August 12, 2014
  Followup from the Pelican Staff: I do not believe there is an update. - Nick at Pelican Parts  
Befeater Comments: I did not see springs inside the coils and I have submitted my question to Delphi. I will update you.
August 7, 2014
  Followup from the Pelican Staff: Thanks, keep me posted. Would like to know what you find. - Nick at Pelican Parts  
Beefeater Comments: I have new Bosch R6 plugs and new Delphi coils. I notice that there is an air gap of about 1mm between the coil electrode and the plug electrode i.e. with the plug seated in the coil, the plug can be pushed in until the electrodes touch, and when released, the plug resettles with an air gap. So, in operation, does the spark jump from the coil to the plug? Or should they be in contact with no air gap? Many thanks.
August 6, 2014
  Followup from the Pelican Staff: Inside the coil should have a spring that makes contact with the spark plug. Is this not the case with your vehicle? - Nick at Pelican Parts  

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