BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > Rear turn indicator failure

View Poll Results: Have your M2C rear indicator units failed?
Yes 135 63.68%
No 77 36.32%
Voters: 212. You may not vote on this poll

Post Reply
 
Thread Tools Search this Thread
      02-10-2021, 10:33 AM   #221
Poochie
Luxury at the redline :)
Poochie's Avatar
United_States
9099
Rep
7,563
Posts

Drives: 2016 M2
Join Date: Aug 2012
Location: NYC

iTrader: (3)

Quote:
Originally Posted by PrinceCity View Post
Quote:
Originally Posted by Poochie View Post
That look defective, unrelated to this rapid flash issue. It looks like the LEDs are on its last leg.. You probably just have a dud unit..

Mines has a pretty bright amber hue and has been working find for over 3 years now..

And LCI taillights are cheap, relatively, like $220 new or $100 used.


Mines looks exactly like these guys below, on both sides:

.
Poochie, there are now FOUR people confirming disabling the builb check is causing the problems, as reverting to oem check resolves. You NEED to respond to this and stop saying "it's unrelated" and the bulb check is harmless and appologized to the people you're affected here.
Oh God, you again with this 🙄.. Ok, I'll humor you one more time before I block you..

People, you, Jesus himself, can do whatever they want to do with their car, regardless of what I state, everyone here are big boys and girls and can form their own opinion, so we don't need your endorsement.

I'm merely just sharing with another member who asked a direct question, on a forum open to the general public, that factually, I've been using this method for years, without any issues described. The end.

And number two, from my own experience with LED lights, I believe those taillights in the video are defective, outside the realm of this topic. Just because you believe it's the infamous bulb check whatever, which seems to keep you up at night because you just won't drop it, doesn't make it fact, unless you have something factual to counter this..

Take it for what it is or don't but would you please stop with accusations already, no one is asking for an internet police.
Appreciate 1
      02-10-2021, 03:20 PM   #222
AKD
Private
AKD's Avatar
United_States
76
Rep
71
Posts

Drives: 2019 LBB M2C 6MT
Join Date: Apr 2017
Location: Bay Area

iTrader: (4)

This just happened to my right rear (with the LED struggling to flash). Car is at the dealer and they are replacing it after seeing the code.
__________________
Appreciate 0
      03-03-2021, 08:43 PM   #223
dannywong321
New Member
2
Rep
11
Posts

Drives: BMW M2 Competition 2018 f87
Join Date: Dec 2020
Location: UK

iTrader: (0)

Garage List
Quote:
Originally Posted by dannywong321 View Post
I cleaned my socket and the problem has not come back ever since. It has been 2 weeks. Thanks mate!
Problem came back after 1.5 months. Will replace it with a new one this time. Fed up with it
Appreciate 1
chris7197273.00
      05-21-2021, 04:06 AM   #224
ThatBlueM2
Enlisted Member
ThatBlueM2's Avatar
5
Rep
33
Posts

Drives: BMW F87 M2 DCT
Join Date: Apr 2021
Location: EU

iTrader: (0)

I've had the issue happen to me a few weeks ago, and it hasn't happened since, until today. Today it happened 3 times within about an hour.

I'll try coding out the warm bulb check and report back.
Appreciate 0
      07-16-2021, 04:14 PM   #225
blitzyo
Private First Class
53
Rep
155
Posts

Drives: 19' M2C
Join Date: Feb 2020
Location: Bootmod3

iTrader: (0)

My left one is often dim now. Today I had the right one go dim, parked the car, got back and the left one started acting up. Hitting the light with my palm a bit fixes it every single time.
I've had the check disabled for a long while now. '19 M2C
Appreciate 0
      07-19-2021, 11:04 AM   #226
Rundskop
Private
Rundskop's Avatar
145
Rep
76
Posts

Drives: 2020 BSM 6MT M2C
Join Date: Sep 2017
Location: Bay Area, CA

iTrader: (0)

Garage List
2020 M2C  [0.00]
My rear left indicator would bug out and flash an error code. Restarting the car would resolve.

Happened enough for me to take it to dealer. They replaced the entire light with a new one.
Appreciate 0
      08-31-2021, 08:52 AM   #227
Carrera2RS
First Lieutenant
United Kingdom
203
Rep
303
Posts

Drives: BMW M2
Join Date: Oct 2016
Location: UK

iTrader: (0)

2018 LCI non comp, I have my left go 2m ago, now ,my right has gone. 12k miles only
Appreciate 0
      09-13-2021, 04:56 PM   #228
bngcruiser
Second Lieutenant
bngcruiser's Avatar
United_States
277
Rep
266
Posts

Drives: '89 Land Cruiser, '18 M2
Join Date: Mar 2020
Location: Denver, CO

iTrader: (0)

Garage List
2018 BMW M2  [0.00]
i've been dealing with this for awhile now.

How are dealers treating this issue for most?
__________________
Appreciate 0
      09-13-2021, 05:10 PM   #229
-Eidos
@lbb_kev
482
Rep
508
Posts

Drives: 2018 BMW M2 (LBB)
Join Date: Feb 2020
Location: California

iTrader: (0)

Quote:
Originally Posted by bngcruiser View Post
i've been dealing with this for awhile now.

How are dealers treating this issue for most?
When my car was under warranty the dealer replaced my left indicator for no charge.
__________________
Speedtech Stage 3 (8474) | Remus Exhaust | Wagner EVO 3 | XClutch | Dorch Stage 3 HPFP | Nostrum S2 Injectors | Walbro 535 | EOS EKP | BendCalibration Flex Fuel Kit | Intrax 1K2 | SPL | Drexler GT Race Light LSD by limitedslip.de | Schirmer Diff Lift Kit

Full E85 DI-Only 717WHP Flex Fuel tuned by BendCalibration (ECUTek) | Built by SD Garage
Appreciate 0
      09-14-2021, 12:38 PM   #230
davidk
Enlisted Member
61
Rep
122
Posts

Drives: 2018 X3 M40i, 2018 M2
Join Date: Mar 2008
Location: Gig Harbor, WA

iTrader: (0)

2018 LCI - I have had the left turn signal failure warning off and on for about a year. It usually clears itself within a few seconds. My warranty is up next month, so I took it to the dealer. They saw the stored codes, cleared them, couldn't detect a problem, and sent me on my way. It doesn't occur often enough to really concern me, but i wish they would have replaced the light.
Appreciate 0
      09-15-2021, 07:41 AM   #231
W///
Lieutenant General
W///'s Avatar
7434
Rep
12,293
Posts

Drives: F82GTS, E36/E92M3, Z4M
Join Date: Sep 2011
Location: SC

iTrader: (13)

Only happened once on the LHS on a very hot day in SC (about 100F+). Happened twice in one day, but hasn't happened since. According to the service history, I think the taillights have already been replaced once under warranty.
__________________
Current:
16 F82 M4 GTS, Black Sapphire/Black, DCT
08 E92 M3, Sparkling Graphite/Bamboo Beige, 6MT
07 E85 Z4M Roadster, Alpine White/Red, 6MT
99 E36 M3, Techno Violet/Dove Grey, 6MT
Appreciate 0
      09-15-2021, 12:47 PM   #232
Enabled
Lieutenant Colonel
1397
Rep
1,791
Posts

Drives: 328xd Wagon, M2 Competition
Join Date: Jun 2018
Location: Houston

iTrader: (0)

My left one does it rarely..

Looking through the coding, all the other bulbs/circuits in the taillight that are LED powered are set to no cold/hot checks for bulb failure... EXCEPT the turn signal. I wonder why that is.
__________________
-2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs.
-2019 M2 Competition MT, Alpine White. Self-tuned 560hp
-2016 Mini Cooper S, MT. Many plans.
Others:
-E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
Appreciate 0
      09-15-2021, 05:28 PM   #233
chris719
Major General
7273
Rep
7,252
Posts

Drives: '08 M Roadster
Join Date: Oct 2007
Location: NJ

iTrader: (0)

Quote:
Originally Posted by Enabled View Post
My left one does it rarely..

Looking through the coding, all the other bulbs/circuits in the taillight that are LED powered are set to no cold/hot checks for bulb failure... EXCEPT the turn signal. I wonder why that is.
Maybe they knew this would happen . I hate to say it, but I think the bulb check is finding a legit issue based on the dimming some people are reporting. It might be as simple as the connection becoming higher resistance over time due to corrosion or contamination of some kind. I'd unplug it and clean with CAIG DeoxIT.

There isn't an available schematic for what is in the taillight assembly, right?
Appreciate 0
      10-05-2021, 05:42 AM   #234
doughboy
Major General
doughboy's Avatar
1543
Rep
8,972
Posts

Drives: 2018 M2 Comp 6MT
Join Date: Jan 2009
Location: UK

iTrader: (2)

Quote:
Originally Posted by lengrenjt View Post
Mine says "not active".
I'n resurrecting this as my left rear indicator is getting bad again.

MY2018 M2C.

Your screen shots of bimmer code for the REM module are very different to mine?

Maybe there's been a bimmer code update by mine only shows "led conversion" for each lamp and then "active" or "unknown value" and "unknown" is selected...

Last edited by doughboy; 10-05-2021 at 06:59 AM..
Appreciate 0
      10-05-2021, 11:36 AM   #235
-Eidos
@lbb_kev
482
Rep
508
Posts

Drives: 2018 BMW M2 (LBB)
Join Date: Feb 2020
Location: California

iTrader: (0)

Quote:
Originally Posted by doughboy View Post
I'n resurrecting this as my left rear indicator is getting bad again.

MY2018 M2C.

Your screen shots of bimmer code for the REM module are very different to mine?

Maybe there's been a bimmer code update by mine only shows "led conversion" for each lamp and then "active" or "unknown value" and "unknown" is selected...
You are correct. I recently tried to use BimmerCode and this is the option that worked for me:
Attached Images
 
__________________
Speedtech Stage 3 (8474) | Remus Exhaust | Wagner EVO 3 | XClutch | Dorch Stage 3 HPFP | Nostrum S2 Injectors | Walbro 535 | EOS EKP | BendCalibration Flex Fuel Kit | Intrax 1K2 | SPL | Drexler GT Race Light LSD by limitedslip.de | Schirmer Diff Lift Kit

Full E85 DI-Only 717WHP Flex Fuel tuned by BendCalibration (ECUTek) | Built by SD Garage
Appreciate 0
      10-05-2021, 01:58 PM   #236
ThatBlueM2
Enlisted Member
ThatBlueM2's Avatar
5
Rep
33
Posts

Drives: BMW F87 M2 DCT
Join Date: Apr 2021
Location: EU

iTrader: (0)

Quote:
Originally Posted by ThatBlueM2 View Post
I've had the issue happen to me a few weeks ago, and it hasn't happened since, until today. Today it happened 3 times within about an hour.

I'll try coding out the warm bulb check and report back.
I've coded this out I think...sometime in July (2021), and haven't had the problem since.
__________________
Disconnected.

Last edited by ThatBlueM2; 05-23-2022 at 06:30 AM.. Reason: Additional information
Appreciate 0
      10-05-2021, 03:45 PM   #237
doughboy
Major General
doughboy's Avatar
1543
Rep
8,972
Posts

Drives: 2018 M2 Comp 6MT
Join Date: Jan 2009
Location: UK

iTrader: (2)

Quote:
Originally Posted by -Eidos View Post
You are correct. I recently tried to use BimmerCode and this is the option that worked for me:
Great, thanks, I'll give that a try at the weekend
Appreciate 0
      10-26-2021, 03:01 AM   #238
Billyescopetas
Registered
2
Rep
2
Posts

Drives: BMW M2
Join Date: Oct 2021
Location: Spain

iTrader: (0)

I also have the dimming issue in my rear left indicator. It’s an M2 LCI. Malfunction message in the dash and fast blinking as well.

Video attached with hazard lights (no fast blinking): https://youtube.com/shorts/maKKmFlPrxg?feature=share

After carefully reading this long thread I will first clean conector contacts and inspect ground wiring.
I don’t think my issue is related to warm monitoring so I don’t plan to code this out.

I will ultimately replace the whole unit if cleaning makes no improvement. The dimmed activation seems an issue with the LED board electronics itself.

Last edited by Billyescopetas; 10-26-2021 at 03:10 AM..
Appreciate 1
chris7197273.00
      10-26-2021, 04:08 AM   #239
doughboy
Major General
doughboy's Avatar
1543
Rep
8,972
Posts

Drives: 2018 M2 Comp 6MT
Join Date: Jan 2009
Location: UK

iTrader: (2)

When it is doing the "dimming" issue, hit the light assembly with your hand, see it it fixes it.

After a "smack" my fault goes away for a few days, then comes back, which makes me think it is some internal bad connection in the lamp housing.
Appreciate 0
      10-27-2021, 12:27 AM   #240
Billyescopetas
Registered
2
Rep
2
Posts

Drives: BMW M2
Join Date: Oct 2021
Location: Spain

iTrader: (0)

Quote:
Originally Posted by Anthony1s View Post
1 year update:

I have not had this issue come back after the dealership replaced both tail lights.
M2 LCI?
Appreciate 0
      12-21-2021, 06:45 PM   #241
GT6Racer
New Member
5
Rep
3
Posts

Drives: M2
Join Date: May 2018
Location: Michigan

iTrader: (0)

Inconsistent L/R turn signal warm test coding from factory.

Hi,
My 2018 LCI non Comp has been having issues ( thinks bulb is out, flashes rapidly ) with the rear left turn signal only. It seems to happen mainly at the start of Michigan winter (cold/damp) and this year has been doing it consistently for the past few weeks. Removing/refitting the tail light plug fixes it for a while, but then a few months later it comes back. I’ve taken it to the dealer but all they did was unplug/replug the tail light - ie fixing it for that day but not solving the issue. They refuse to admit this is a common issue, and have no instructions from BMW to do anything. After reading this forum, I checked the warm test setting. On my right turn it was coded inactive, but on my left was it was active, so I changed the left and the issue was immediately fixed. It seems that BMW did a poor job coding as I see others have found inconsistencies too. As my right was always coded inactive by BMW I have no concerns making the left match it. I do think the root cause is that the current is very close to triggering the warm current defect, and any small change in connector/ground resistance is enough to cross the limit.
Hopefully it will stay fixed now.
Appreciate 0
      12-22-2021, 04:00 AM   #242
doughboy
Major General
doughboy's Avatar
1543
Rep
8,972
Posts

Drives: 2018 M2 Comp 6MT
Join Date: Jan 2009
Location: UK

iTrader: (2)

I turned off the warm test too, but of course now I have no failure alert at all.

You can unplug the light cluster, no indicator fail warning.

Recently other cars behind were honking me, so I checked and the left rear indicator wasn't working, but no alert of course.

As usual, give the light cluster a whack with my hand it works again for a few more weeks. Now I check in the mirror against garage door when I leave that the indicators are working...

Another job to sort in the spring...
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 10:53 AM.




m2
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST