[DanG]

I see that the administrators closed my old right turn signal malfunction thread.

So I guess I need to start a new one.

Two years after I thought my dealer had fix this problem, I just started to get the dreaded right turn signal malfunction message.

I go to the dealer in a little over a week. I guess we will see what they do this time. Good timing though. My warranty is up at the end of this month.

[Sundinisagod]

Yeah this is the only thing I’ve had go wrong with mine. It was repaired last June, I think the whole rear tail light assembly replaced.

[zellatc]

If it helps, I had the same issue with the rear left. I just dismounted the light, cleaned the contacts thoroughly and so far so good (since 6 months)

[Al Bundy's Dodge]

Had same issue with both of mine with in the last 12-18 months, and had both housings replaced under warranty. No issues since.

But if it returns out of warranty I just plan to code out the bulb check using Bimmercode. I tested this for a bit before having my right side replaced and it worked without issue.

But also hoping that if it fails again it's within 2 years since there is a two year warranty on parts.

[Tag]

I wouldn't stress over this. Since this issue was already covered under warranty before and has come up again while still under warranty you are covered. The dealer should also cover it if it happens again outside of warranty as a good will repair, especially since it's a safety issue. If they don't talk to a manager, go to another dealership or call BMW NA and express your frustration.

[DanG]

Got service done today. They found 106 turn signal malfunctions. Replaced the right turn signal assembly.

Hopefully this will cure the problem.

[Fined]

Originally Posted by zellatc

If it helps, I had the same issue with the rear left. I just dismounted the light, cleaned the contacts thoroughly and so far so good (since 6 months)

I had the same issue with the rear left once in 2019 and once in 2021. I did the old engineering standby.. gave it a good smack and it started working again. The fix, while it only lasted 1-1.5 year(s) each time took me literally one second so I'm ok with the effort involved.

[///MPhatic]

Originally Posted by zellatc

If it helps, I had the same issue with the rear left. I just dismounted the light, cleaned the contacts thoroughly and so far so good (since 6 months)

So it's a contact issue? Corrosion or just condensation? Bad seal?

[DanG]

Originally Posted by ///MPhatic

So it's a contact issue? Corrosion or just condensation? Bad seal?

Inspection on my taillight showed no corrosion or connector problem. They had a back and forth discussion with BMWNA on trouble shooting and finally a solution. The solution was to replace the taillight. It took them all day to fix it through.

Since it is a new part I now have a two year warranty on the right taillight.

[///MPhatic]

Originally Posted by DanG

Inspection on my taillight showed no corrosion or connector problem. They had a back and forth discussion with BMWNA on trouble shooting and finally a solution. The solution was to replace the taillight. It took them all day to fix it through.

Since it is a new part I now have a two year warranty on the right taillight.

They didn't try to fix mine at all, they just replaced it.

[JustAWhisper]

There is a huge long thread about this on the technical forum.

I had my passenger taillight begin to throw errors about a year ago. I took it to the dealer and they tried to pretend that they couldn't see any errors and that it was probably a one time thing. I had to wait for it to go off again and then immediately drove to the dealership without touching my turn signal (*cue BMW driver jokes*). They ended up replacing the entire taillight under warranty. Hasn't had an issue since.

However, now my driver side taillight recently started giving me occasional errors. My warranty expires in March so I'll have to figure out how to convince the dealer to fix it before then.

In the technical thread, there have been a lot of discussions about root causes for people who don't want to spend $700 replacing a taillight out of warranty. Unfortunately, I don't think anyone has definitely identified the issue. As already mentioned, some folks found removing, cleaning, and replacing helped, while others have not had such luck. Someone figured out that disabling bulb monitoring with bimmercode prevents the errors, but at least one person has also caught their car on fire doing that, so I wouldn't recommend that.

It's a weird issue.

[DanG]

Originally Posted by JustAWhisper

There is a huge long thread about this on the technical forum.

I had my passenger taillight begin to throw errors about a year ago. I took it to the dealer and they tried to pretend that they couldn't see any errors and that it was probably a one time thing. I had to wait for it to go off again and then immediately drove to the dealership without touching my turn signal (*cue BMW driver jokes*). They ended up replacing the entire taillight under warranty. Hasn't had an issue since.

However, now my driver side taillight recently started giving me occasional errors. My warranty expires in March so I'll have to figure out how to convince the dealer to fix it before then.

In the technical thread, there have been a lot of discussions about root causes for people who don't want to spend $700 replacing a taillight out of warranty. Unfortunately, I don't think anyone has definitely identified the issue. As already mentioned, some folks found removing, cleaning, and replacing helped, while others have not had such luck. Someone figured out that disabling bulb monitoring with bimmercode prevents the errors, but at least one person has also caught their car on fire doing that, so I wouldn't recommend that.

It's a weird issue.

As I said earlier I am the one that started the long thread on right turn signal malfunction.

The wiring and connectors were fine on my taillight. But they did read 106 error messages. It is documented on my repair order.

BMWNA had them replace the taillight assembly.

[zellatc]

Originally Posted by ///MPhatic

So it's a contact issue? Corrosion or just condensation? Bad seal?

Hi, sorry I didn't reply earlier, I didn't check the mentions.

I did not see condensation/corrotion/burnts/rustiness. It happened during summer (wet area near the sea). I opened, cleaned all the contacts properly with circuit cleaner and so far, no issues.

Mine is an LCI, if it helps

[steve457]

I'm at the dealer currently having my '19 M2C rear lights replaced due to the malfunction, and my service advisor just told me that BMW extended the warranty on the rear units to 10 years. I'll see if I can get a screenshot of the notice he was reading later, but for those of you out of warranty it might be worth a try to check with your dealer.

Update: I just took a look at the service note and it doesn't actually say the tail light assembly warranty has been extended, but instead just mentions the taillight assembly side mounting tabs. So unlikely the entire assembly warranty has been extended.

[GoneIn4Secs]

So you get a message in the cluster when this happens right?

[DanG]

Originally Posted by GoneIn4Secs

So you get a message in the cluster when this happens right?

Yes a message appears on the dash. The signal also does a quick flash.

[steve457]

Originally Posted by GoneIn4Secs

So you get a message in the cluster when this happens right?

Correct. In addition the malfunction is stored in the computer so the dealer could just scan the car to see that the problem occurred. In my case, they found that the malfunction has been occurring for the past year on both the right and left sides, so they replaced both tail lights.

[Jackhammer909]

Originally Posted by DanG

I see that the administrators closed my old right turn signal malfunction thread.

So I guess I need to start a new one.

Two years after I thought my dealer had fix this problem, I just started to get the dreaded right turn signal malfunction message.

I go to the dealer in a little over a week. I guess we will see what they do this time. Good timing though. My warranty is up at the end of this month.

can you provide a link to the old thread? I just bought a used M2 and would like to learn more about this issue.

Originally Posted by DanG

Yes a message appears on the dash. The signal also does a quick flash.

It did happen for me once when I signaled, that the flasher was quick, like there was a burned out bulb, but when I tried the signal again, it was normal.

I'd like to read that thread for more info.

[DanG]

Originally Posted by Jackhammer909

can you provide a link to the old thread? I just bought a used M2 and would like to learn more about this issue.

It did happen for me once when I signaled, that the flasher was quick, like there was a burned out bulb, but when I tried the signal again, it was normal.

I'd like to read that thread for more info.

Here you go: https://f87.bimmerpost.com/forums/sh...al+malfunction

[Jackhammer909]

thanks.

[Fly M2]

I was not so fortunate. I had the same issue with both taillights right after the warranty expired. $500 each

[mikeyymonster]

Originally Posted by Fly M2

I was not so fortunate. I had the same issue with both taillights right after the warranty expired. $500 each

Damn thats terrible