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BMW Charcoal Canister Replacement
 
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Pelican Technical Article:

BMW Charcoal Canister Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$

Talent:

***

Tools:

T20 Torx driver, Flathead screwdriver

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 335i xDrive Coupe (2009-13)
BMW 335i xDrive Sedan (2009-11)
BMW 335i/is Coupe/Conv (2007-13)
BMW 335i/xi Sedan (2007-11)
BMW 335xi Coupe (2007-13)

Parts Required:

Charcoal canister, DMTL pump

Hot Tip:

Be careful when working with evap system, do not damage any hoses or connections

Performance Gain:

Repair evap system faults

Complementary Modification:

Replace evap hoses

The charcoal canister and DMTL pump are located inside the left side rear fender. The charcoal canister is responsible for storing hydrocarbon vapors from the fuel tank that are eventually sent to the engine via the purge solenoid. The DMTL pump is mounted to the charcoal canister and is used to pressurize the evap system to check it for leaks. The DMTL pump can fail electrically, a fault code will be stored and the MIL (malfunction indicator lamp) will be illuminated. If you have a fault code for the DMTL pump current high, replace the DMTL pump with new.

Jack the rear of your vehicle and support is using jack stands. See our tech article on jacking up your vehicle.

First, you have to remove the rear bumper plastic shield.
Figure 1

First, you have to remove the rear bumper plastic shield. Remove four 8mm plastic trim fasteners. (yellow arrows). One of these is located inside the fender well. Then remove two 10mm fasteners (green arrows)

Then pull trim piece down and out of rear bumper.
Figure 2

Then pull trim piece down and out of rear bumper.

Working at charcoal canister, disconnect hoses (green arrows) Press the hose release collar, then pull hose straight off charcoal canister.
Figure 3

Working at charcoal canister, disconnect hoses (green arrows) Press the hose release collar, then pull hose straight off charcoal canister. There are three hoses you will have to disconnect.

Then disconnect the DMTL pump electrical connector by pressing the release tab and pulling it straight off.
Figure 4

Then disconnect the DMTL pump electrical connector by pressing the release tab and pulling it straight off. (green arrow)

Next up, remove two 10mm charcoal canister fasteners (green arrows) When removing these fasteners, support the canister while you remove the last one.
Figure 5

Next up, remove two 10mm charcoal canister fasteners (green arrows) When removing these fasteners, support the canister while you remove the last one. The canister can drop out, if it hits the ground it could break. Slowly guide charcoal canister out of rear fender and remove from vehicle

Place charcoal canister on a work bench or solid surface.
Figure 6

Place charcoal canister on a work bench or solid surface. Then remove the three T20 Torx fasteners for the DMTL pump.( green arrows)

Pull the DMTL pump (green arrow) straight out of the charcoal canister to remove.
Figure 7

Pull the DMTL pump (green arrow) straight out of the charcoal canister to remove. The new DMTL pump should come with a seal. Be sure to replace it when installing the new part. Before reassembling the charcoal canister., inspect the canister lines and hoses for cracks or damage. You don't want to reinstall a defective part, your check engine light will be on soon after if you do. Install new DMTL pump, then reassemble charcoal canister and bumper plastic shield.

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Comments and Suggestions:
T Comments: Have a 2006 BMW 325xi E90

Fill up at the gas station and car will not start until about 5 tries or 10 mins of sitting. I replaced the DMTL with a new one and p2400 went away. I have p1428 now and have no idea where to look or if it is related to my delayed after refuel start issue. Battery is new.

Please help
December 1, 2016
Lukas Comments: I have a 2011 BMW 328i. Replaced the leak detection pump, and gas cap parts bought at BMW. Had the light reset and after 3 days, again light comes on with code P0456. Thoughts of what else it could be?
November 3, 2016
  Followup from the Pelican Staff: That fault is for a small leak. Check the lines, hoses fuel tank and solenoids for leaks. - Nick at Pelican Parts  
Bob Comments: 2007 335xi displaying P2418 code, is that for the Fuel Vapor Detection Pump?
September 22, 2016
  Followup from the Pelican Staff: P2418 Evaporative emission system switching valve control circuit open

Either the pump or the vent solenoid. - Nick at Pelican Parts
 
Frankiec02 Comments: The other day my car starting sputtering and I felt like the power had been reduced while I was accelerating onto the freeway and shifting from 2d to 3d. The sputtering noise went away, which sounded like it was coming from the engine, but the sluggish feeling remained. It almost felt like it was misfiring. A guy at AutoZone, with a code reader, gave me the code P0440, Evaporation Emission System. Would replacing the charcoal canister get rid of the sluggish feeling?
June 20, 2016
  Followup from the Pelican Staff: Charcoal canister and evap leaks are likely unrelated to your issue. Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders. - Nick at Pelican Parts  
Apone911 Comments: And I still can't get the fuel to fill more than 2 gallons at a time before pump clicks off.
May 23, 2016
  Followup from the Pelican Staff: Likely the vent, as I mentioned. - Nick at Pelican Parts  
Apone911 Comments: Car is 2006 330i. I replaced pump and cannister and noticed as I was attaching hoses that the smaller of the two coming out of the cannister felt like it was not attached on the opposite end from the cannister had a lot of play. I wanted to find a way to access where the hoses connect opposite the cannister. Thanks
May 23, 2016
  Followup from the Pelican Staff: Check if the large line off the DMTL to see if it restricted. That line runs to the vent filter. - Nick at Pelican Parts  
Apone911 Comments: Where do the vent lines go to from the evaporate canister and DMTL pump? In other words, the hoses/lines attached to the evaporate can are connected to something else-what are they connected to? How can I access these other connections. I have brand new lines that came with my new canister and pump, but I don't know how to see where the other end goes
May 17, 2016
  Followup from the Pelican Staff: What vehicle are you working on? Depending on the model, the vent line will either vent out of the pump or to a filter. There is a large vent line on most vehicles that run to the tank. - Nick at Pelican Parts  
krando67 Comments: The fuel tank breather valve that connects to the intake manifold. Part # 13907618643. The DMTL pumps are same part number it's the charcoal canisters that are different part numbers. I haven't replaced a charcoal canister yet.
April 29, 2016
  Followup from the Pelican Staff: The valve at the intake has to be the same part number.

You are better off sealing the system and looking for leaks using an EVAP smoke machine. Also, check if the vent hose is clear. - Nick at Pelican Parts
 
krando67 Comments: What I meant to say was I replaced the breather valve because I had the code P0442 in addition to P0440, now I only have P0440.

I thought that using the jerry can might've spilled some gas in the canister which might be the cause of this code.
April 26, 2016
  Followup from the Pelican Staff: What breather valve, for the crankcase? - Nick at Pelican Parts  
krando67 Comments: Can a bad charcoal canister cause P0440?
I replaced my fuel pump and the seal just above it about 5 months ago. Tank dried so I had to fill the tank using a jerry can and ever since, I get a check engine light every tank, turns on at 3/4 tank, goes away around 1/4. So far I've replaced the gas cap, the dmtl pump and the breather valvep0442.

I noticed the N51 and N52 charcoal canisters have different part numbers but look exactly the same. Is there a difference?
2010 128i N51

Thanks,
krando67
April 26, 2016
  Followup from the Pelican Staff: If the part numbers are not the same, there is a difference. That may be you issue. I would start by installing the correct part.

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
 
tinnsoldaten Comments: Thanks Nick , I should also comment that when I took off canister I used a hose to connect to all lines going to canister, I was able to blow through all of them.

And my car does not have the DMTL pump , its only canister back there.

I guess now tank breather valve in engine bay is next point to look at. Gonna try do the 12 v function test and check that it is open.
April 21, 2016
  Followup from the Pelican Staff: The vent should always be open, the solenoid. Use a turkey baster to check for blockages. - Nick at Pelican Parts  
tinnsoldaten Comments: I had a incident where I did the fuel pump upgrade , upon install and buttom up, I think I forgot to put the breather line back in place, the one under the plastic lid.

After going to gas station and filled it up max I got a hard time starting it and rough idle. I was luckily close to a garage and they took it in and drained fuel and ran some fuction test in attempt to drain via breather on top of plastic lid, which I find hard to believe even possible. Anyway , car has not been filled all the way to max ever since , but I now have issue with filling. It clicks shortly after start and I need to repeat a million times to get filled some. I recently took off the canister and drove to gas station to try if filling would be solved, but it didnt.

My car is a 335i 2007 European version.

My last hope is that the breather valve in engine bay could be the cause of the filling issues.

The garage where I had it , mention something of a valve built into the fueltank itself , that this also had have caused issues, but I have not heard of it in forums yet.

April 20, 2016
  Followup from the Pelican Staff: I would assume something is in the open line, like a bug, plugging the vent. This happens more often than you would think.

if you attached that line and proved it is clear, the vent line or DMTL pump may be faulty. Check the line for the ORVR as well. I would grab a repair manual. It will have the info.

Give our parts specialists a call at 1-888-280-7799.- Nick at Pelican Parts
 
BMWFatty Comments: For people who can't get the hoses off. I found that if you can get drop the whole thing with the hoses attached onto a block of wood or something so it doesn't drop far, but it will be far enough that you can replace the pump. IN this way, you only remove the wires and hoses from the pump, and leave the charcoal canister in place. Just an information point that there is plenty of room to drop it and get the job done when it seems hopeless :
April 7, 2016
  Followup from the Pelican Staff: Thanks for the additional info and feedback. We appreciate it.
- Nick at Pelican Parts
 
Apone911 Comments: Hi-just replaced both the pump and cannister-still can't pump gas more than 1-2 gallons at a time. Also getting P0440 code.

March 31, 2016
  Followup from the Pelican Staff: Check if the vent line is plugged. - Nick at Pelican Parts  
Steve Comments: I drive an 01 325i and I can see and smell the gas leaking out a little bit when filling the tank or when the tank is over half full. I have a code for DMTL leak.

Do you think I should try to replace the charcoal canister or the DMTL pump first or just do both?

Thanks nick
March 16, 2016
  Followup from the Pelican Staff: Find the source of the leak. You may have a crank in the filler neck or the sealing o-rings for the sending units. Both of those issues could cause your fault. - Nick at Pelican Parts  
Apone911 Comments: One more question sorry! about the replacement of charcoal canister and pump. When I told the dealer I would change it myself he paused a bit and, almost like he was trying his best to convince me to let them do it for $900, said I would need the computer reprogrammed. If true, what exactly is it being reprogrammed for?
March 1, 2016
  Followup from the Pelican Staff: I can't think of what would need to be programmed. maybe he means the fault codes cleared. - Nick at Pelican Parts  
Apone911 Comments: Thanks for the advice! Which of the three hoses is the vent line?
February 9, 2016
  Followup from the Pelican Staff: The larger one. - Nick at Pelican Parts  
Apone911 Comments: If I have an OBDii code P0440 and can't pump gas more than 2-3 gallons at a time, do I need to replace DMTL pump, charcoal canister, or both? 2006 e90 330i
February 1, 2016
  Followup from the Pelican Staff: It could be just a restriction. Check if the vent is plugged before you replace anything. Remove the vent line at the canister, then try filling the tank. If it fills, replace the canister and DMTL pump. - Nick at Pelican Parts  
Jay Comments: When i fill at the tank, after half gallon fuel doesnt go down.
January 19, 2016
  Followup from the Pelican Staff: What do you mean by go down? - Nick at Pelican Parts  
Corney Comments: Hello I have a 06 325i don't have no check engine light but I smell gas with no visible leak could it be the evap canister.
January 8, 2016
  Followup from the Pelican Staff: It could be. Best bet is to smoke test the system. This will reveal any leaking lines, seals or if it is the canister. - Nick at Pelican Parts  
Gordo Comments: i got an E90, i tried an OBD2 with keys on but without starting the engine and i got P1775 code.. but if a search for codes with the car on, more codes will come out P1017, P0171, P240a, P2400 whats happening ? is error P1775 causing other errors?
December 24, 2015
  Followup from the Pelican Staff: The P1775 is a transmission shift fault. The others are fuel trim and engine related. My suggestion is start with the engine running issues, check for an unmetered air leak causing the fuel trim fault. For the shift fault, this could be a slip caused by low fluid or low pressure. Start by checking your fluid level. If it is OK, you may have worn parts causing a pressure drop and slip. I would have it checked before it gets much worse. - Nick at Pelican Parts  
Hotjesssica954 Comments: ..I forgot to mention is a '12 BMW 335i convertible

check engine light with code P0442 evap small leak


thanks!

Jesssica
October 21, 2015
  Followup from the Pelican Staff: Got it, thanks. - Nick at Pelican Parts  
hotjesssica954 Comments: i was told by the dealer i need to replace damage L/R panel & charcoal cannister..HOW MUCH WILL they charge me? ...and is it better to do it somewhere else? cheaper? ..they sent me these pictures ...Apparently i bought this used car like this just 2 months ago

thank you for the help!

Jessica.
October 21, 2015
  Followup from the Pelican Staff: I am not sure of the cost, you will need to ask them for an estimate. You can also check with other local shops for estimates. 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
 
bimmer lover Comments: Mine is saying i have no power to it , even after pump was replaced
October 21, 2015
  Followup from the Pelican Staff: Your what has no power? - Nick at Pelican Parts  
Antony Comments: I got P0442 evap small leak in my 2006 325i???l put a new gas cap and check de charcoal canister and dmtl pump lines and nothing the service soon its on
August 23, 2015
  Followup from the Pelican Staff: Still small leak? I would check the system for leaks using a smoke machine. The leak could be in a line or the fuel pump or sending unit collar seal, or the purge solenoid. - Nick at Pelican Parts  
Lvthunder Comments: At first, the DTC popped up 1447, so I changed DMTL pump and then .. Soon after I changed it, the trouble code 1449 popped up, so then I changed the gas cap, purge valve and vapor canister, only to have the light remain on, so I changed the pump again, so far the light has remained off crossing fingers but I did notice when I removed the pump the first time, little charcoal pellets falling out. So, if it pops on again, last thing I can do is get a smoke test . It was only after reading this site that I changed the pump again cause of it saying if the code reads "pump current high, change the pump "
August 12, 2015
  Followup from the Pelican Staff: usually pump current high is a faulty pump. - Nick at Pelican Parts  
Jeremy Comments: Could a bad vapor canister make a new DMTL pump go bad?
August 7, 2015
  Followup from the Pelican Staff: Maybe, if carbon is broken apart and getting into the pump.

How has it failed? - Nick at Pelican Parts
 
Hank Comments: 2008 335i e90. The DTML pump is on the driver's side.

Need to take the wheel off first. Then remove 2-3 of the screws for the fender lining to be pushed out of the way. You will need to unscrew 8mm screws 6-8? to remove panel underneath to access the canister/pump. Then the 2 10mm screws under - to let the canister drop. Hoses are pretty durable just yank hard. Hoses were the toughest part of the job, and took some muscle.

On the current pump, there is a rubber piece that you will need to wiggle off with a flathead screwdriver to use on between the canister and new pump, but it makes sense when you see it. Also, there are 3 pretty small star-screws in order to get the pump off the canister.

I had code P2402, which I've read won't go away unless you clear it, or drive for 3 days for it to reset.

Thanks Pelican Parts for the fast shipping!
August 2, 2015
  Followup from the Pelican Staff: Due to the dual mufflers, the position changed.

Thanks for sharing your installation process and experience. These type of comments add so much to the Pelican tech community.
- Nick at Pelican Parts
 
neil Comments: I have a p2402 on 2011 328i xdrive
This seems to indicate DMTL pump failure?
July 16, 2015
  Followup from the Pelican Staff: Most times it is the DMTL pump. - Nick at Pelican Parts  
mike Comments: I was told i need to replace my DMTL, but was not told to replace the Charcoal canister along with it. Is it safe to do just the DMTL? Is it necessary to do both?

2009 e91 328i RWD
April 15, 2015
  Followup from the Pelican Staff: Sure, as long as the canister is in good shape. - Nick at Pelican Parts  
Desmond Comments: Is the BOSCH oem supposed to come with a new seal too? Mine didn't
April 9, 2015
  Followup from the Pelican Staff: Not sure. If you got it from us, 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
 
Kesh Comments: I have just replaced the Petrol pump on a BMW 320 I E90 and started having fuel leaks by the Charcoal Canister. Do I need to replace the Charcoal canister as well or there is another way of stopping the leak?
April 1, 2015
  Followup from the Pelican Staff: The canister should not have raw fuel heading to it. I would inspect the lines and see where the fuel is coming from. - Nick at Pelican Parts  
doogiebmw Comments: 07 335i p2400, p2401, p2419, ps240a, are the codes that came up one day after a long drive, wondering what could cause this and where to start.
February 8, 2015
  Followup from the Pelican Staff: These are evap fault codes for the leak detection pump, or DMTL. The pump itself is likely faulty. - Nick at Pelican Parts  
Dave Comments: Would this the EVAP pump cause the car to have long cranks?
January 13, 2015
  Followup from the Pelican Staff: I have not seen the DMTL pump cause that issue. - Nick at Pelican Parts  
Jizzle Comments: My 2004 BMW 745i is having trouble going into its last gear. I went into a local parts store and got the chech engine light looked at and they came up with p1434 code will that have something to do with it?
November 16, 2014
  Followup from the Pelican Staff: That is an evap system fault, not transmission.
First check the transmission fluid level to be sure it is correct. Then check the transmission ECM for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing.

- Nick at Pelican Parts
 
Dave Comments: 2002 BMW 325i. When I disconnected the DMTL pump from the charcoal canister, charcoal pellets spewed from the canister. I also noticed the old DMTL pump was filled with pellets. Is this something I need to worry about, and what are your recommendations?
November 3, 2014
  Followup from the Pelican Staff: The canister may have come apart, haven't seen this much on E46 models, but it is possible. I would remove the lines to the tank and inspect them for debris, also remove the purge solenoid and check it for debris. You will want to replace the canister and any item plugged with debris.- Nick at Pelican Parts  
Ahmed Comments: I got P240A evaporative emission system malfunction in my 2007 335i???
November 2, 2014
  Followup from the Pelican Staff: I need the last seven digits of your VIN to see what the code means. - Nick at Pelican Parts  
E90willbby Comments: If there's is a fault code for p1449 dmtl pump current to high would this b the issue for my car not to start ?
October 28, 2014
  Followup from the Pelican Staff: No, this fault code or component would no cause the engine to not start. That is, unless it is shorting the entire DME< which I have not seen. - Nick at Pelican Parts  
Dubl Comments: I've got a 2011 328XI with a P1449 code, which looks like I need to replace a new DTML pump. Do you know if the code will reset itself after I replace the pump, or are these codes hard set and need to be reset with a scan tool?
October 28, 2014
  Followup from the Pelican Staff: It will reset after 3 good trips of the system passing the test. Or just clear the code. - Nick at Pelican Parts  
2seaters Comments: Bravo! thanks for your info
October 28, 2014
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
E90willbby Comments: What's the part number ? For the charcoal canister ?dmtl pump? 2006 325i
October 27, 2014
  Followup from the Pelican Staff: I'm no the best with part numbers. Give our parts specialists a call at 1-888-280-7799 and they can help figure out which part or repair kit you need.
- Nick at Pelican Parts
 
Rick Comments: Executed this 2 days ago and service engine soon turned off on its own today. Great DIY thank you!
August 31, 2014
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 
Andres Comments: Where is this located on a 2007 335i. With dual exhaust?
January 18, 2014
  Followup from the Pelican Staff: If I remember correctly, it should be in the same location. - Nick at Pelican Parts  

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