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BMW Reverse Light Switch Replacement
 
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Pelican Technical Article:

BMW Reverse Light Switch Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$

Talent:

***

Tools:

19mm wrench, DVOM, fuse jumper wire.

Applicable Models:

BMW E90 3-Series (2006-11)
BMW E91 3-Series (2006-12)
BMW E92 3-Series (2007-13)
BMW E93 3-Series (2007-13)

Parts Required:

Reverse light switch

Hot Tip:

Test circuit before replacing switch

Performance Gain:

Proper reverse light function

Complementary Modification:

Replace reverse light bulbs also

Manual transmission E90 models utilize a reverse light switch in the transmission that sends a signal to the footwell module to activate the reverse light bulbs. The footwell module is supplied power from four fuses located in the engine compartment E-box, Fuses, F36, F41, F52, F56 (check with the latest repair information to confirm fuse numbers). In this tech article, I will go over testing and replacing the reverse light switch.

Raise and support rear of vehicle on jack stands. See our tech article on jacking up your vehicle.

Working below transmission, remove transmission splash shield. See our tech article on lower splash shield replacing.

Replacing
The green arrow shows the location of the reverse light switch when looking from rear of vehicle toward transmission.
Figure 1

The green arrow shows the location of the reverse light switch when looking from rear of vehicle toward transmission.

Press electrical connector wire retainer and pull connector straight off switch.
Figure 2

Press electrical connector wire retainer and pull connector straight off switch. (green arrow)

Next, use a 19mm wrench and loosen the switch.
Figure 3

Next, use a 19mm wrench and loosen the switch. (green arrow)

Unscrew the reverse light switch and remove it from your transmission.
Figure 4

Unscrew the reverse light switch and remove it from your transmission. I have changed a handful of these switches and none of them had a sealing washer. When installing the new one, do not add a sealing washer unless your vehicle has one when removed. It could change the way the switch works, altering the insertion depth into the transmission. Screw in the new sensor, tighten using a 19mm wrench, then plug in the electrical connector. Reinstall the splash shields and check operation of your switch.

Testing

Remove the reverse light switch from the transmission as described earlier in this tech article.

To test the switch, plug it back into the electrical connector, then press the center button.
Figure 5

To test the switch, plug it back into the electrical connector, then press the center button. When the button is pressed, the reverse lights should illuminate.

If the lights do not illuminate, check the electrical connector (green arrow) power and ground supply.
Figure 6

If the lights do not illuminate, check the electrical connector (green arrow) power and ground supply. The brown wire goes to a chassis ground, the other wire (yellow shown in photo) should have voltage present supplied from the footwell module. If ground is present and no voltage, inspect the fuse to the footwell module, fuses located in the engine compartment E-box, Fuses, F36, F41, F52, F56. If desired, you can used a fused jumper wire to jump the reverse light switch terminals together, this will illuminate the reverse light switch.

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Comments and Suggestions:
Tony Comments: Hello there
I have the same problem on my 320d E90 2006 reverse light stop working and my parking sensors either.can you please help me . Some people says its LCM that's make the problem. Is that make sense? Thanks
August 23, 2016
  Followup from the Pelican Staff: That sounds like the case. Best bet is to confirm via fault codes or an output test using an advanced BMW scan tool. - Nick at Pelican Parts  
bmwe90 Comments: hi i have a 2006 325i e90. its automatic transmission. Im having a hard time finding where the backup light switch is located. i checked on the transmission and im not finding it like in the picture above. is it in a different location?
April 19, 2016
  Followup from the Pelican Staff: This article is for manual trans vehicles. You need to locate the range switch. 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
 
Andy Comments: Hi, I have 2006 330xi Back Up light not working.Back Up light Switch also controls back up camera and the auto mirror whenever the reverse gear is engaged? My outside auto mirror work fine.
March 13, 2016
  Followup from the Pelican Staff: The module may not be getting the signal from the switch. Check for fault codes and the input to the lighting module. - Nick at Pelican Parts  
Kaizen Comments: Silly I know but does the bmw msport 2009 320i have 2 reverse lights or one
February 21, 2016
  Followup from the Pelican Staff: In the US, two. - Nick at Pelican Parts  
Alin Comments: thanks!
it's been an year without reverse lights and nobody has an answer.
February 15, 2016
  Followup from the Pelican Staff: No problem. - Nick at Pelican Parts  
Alin Comments: Hello!
I have a BMW e90.
When putting it in reverse there are no reverse lights, no PDC info comes up.
I read in previous comments that two reasons might be wiring or footwell control.
Is there another possibility? Have checked the switch after replacing it by pressing it and had no reverse lights.
How can I check the footwell module other than by using scanners? By replacing it?
Thank you
February 12, 2016
  Followup from the Pelican Staff: Not really. Check the signal to the footwell module, if it is getting there and there is no output, the module is likely faulty. - Nick at Pelican Parts  
Steve Comments: 07 323i auto transmission with no reverse lights. Got it checked by an auto electrician and he said wiring is fine could be inhibitor switch in valve body but not 100% sure and will cost me $2500-3000 to get part and repair. Anything I can do to see if it's something else like footwell module or a switch I can replace myself?
December 10, 2015
  Followup from the Pelican Staff: You can fake the signal from the switch to the module. Just be sure you use a low amp rated fuse when you fake the signal, to protect the module. - Nick at Pelican Parts  
Andruss Comments: Hi!

My e90 manual,318d reverse lights aint working but PDC is working, so the switch isnt the case this time?
October 15, 2015
  Followup from the Pelican Staff: I don't have any experience with the D models here in the US, but they should be similar.

I would think so, the issue is likely with the footwell module or the wiring.- Nick at Pelican Parts
 
vengy Comments: Hi,where is the reverse signal on frm3 module and what color is the wire?
February 19, 2015
  Followup from the Pelican Staff: What vehicle are you working on? - Nick at Pelican Parts  
jay Comments: 06 bmw 325i 3.0 6spd manual transmission no backup lights has 4.9 volts to yellow wire of switch brown wire is ground,jump switch wires still no back up lights
October 24, 2014
  Followup from the Pelican Staff: Problem may be in the footwell control module. I would check if the module is seeing the reverse light switch signal using a BMW scan tool. You can also manually check the signal on PIN 19. - Nick at Pelican Parts  
joe Comments: so if manual transmission has a switch in the tranny, how do the automatic transmission trigger the reverse light? i have a 2006 325 xi with no reverse lights and no power to the socket. i checked the wiring as far as up to the trunck lid harness.
July 7, 2014
  Followup from the Pelican Staff: Via the transmission position switch, to the transmission control module, then to the lighting control module. - Nick at Pelican Parts  
juicedaddy3444 Comments: Its the idrive and the module knob the works how toremove the console it sits in
July 2, 2014
  Followup from the Pelican Staff: The module is not located near the knob. The center console has to be removed to get the knob out. We don't currently have a tech article for your vehicle. 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
 
juicedaddy34 Comments: Hi my name is james tring to find out how to replace the idrive controller in a 750i bmw 2007
June 29, 2014
  Followup from the Pelican Staff: The control module or control knob? - Nick at Pelican Parts  
Jonn Comments: i have replace the reverse switch for my bmw 320d e90 sport pack but reverse lights does not come on ,so i need help to know what can be the problem.
April 21, 2014
  Followup from the Pelican Staff: We don't have your vehicle in the US. However, testing the switch may be similar. See the testing portion of this tech article: http://www.pelicanparts.com/BMW/techarticles/BMW-3-Series-E90/ELEC-Reverse_Light_Switch_Replacement/ELEC-Reverse_Light_Switch_Replacement.htm - Nick at Pelican Parts  
dave Comments: what should the voltage be at the plug end at trans? yellow wire i only have around 4.5v
February 24, 2014
  Followup from the Pelican Staff: What is the symptom? If you operate the switch as shown, do the lights work? If I remember correctly, it should be about 5 volts.- Nick at Pelican Parts  

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Page last updated: Fri 12/9/2016 02:22:01 AM