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I need some help please with my just out of warranty 15 Macan S. The right rear brake light is not working. However, all the right rear leds work fine during other functions, i.e. blinker, key fob lock/unlock. I checked all the fuses with a multimeter and all are ok. Checked for loose wires and clips....none. Also, no warning message at all on the dash. Any ideas on what's going on would be greatly appreciated.
 

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I have the same exact issue on my 15 S as well. I'm about ready to pull the light and troubleshoot it on my bench with the multimeter and bench-top power supply but if somebody else has info that can save me the effort it would be much appreciated.

Thanks
 

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Discussion Starter #3
Rear Brake Light Out

Any luck determining the cause of the brake light issue. I finally took my 15S to the dealership in April. They pulled the bumper and light and checked all the connections. Still did not work. Then it randomly started working ok. They did not know why! Now it's out again! Frustrating.
 

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I just started having the exact same issue with my rear passenger light. It lights up when I lock/unlock the car but doesn’t light up when pressing the brake.....any input would be greatly appreciated
 

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IIRC, a few months after I bought my '15 MT (in '18), I believe first one, then the other tail light
assemblies were replaced under warranty. In those instances I was getting warning messages
in the instrument cluster.

Check this thread (in particular, posts #3 and #4):






Good luck!

?
 

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I had read that post but theirs seemed to have a message appear in their dash board letting them know their light was malfunctioning.
What makes this interesting is that we are not getting a message at all.
Only reason we found out is by someone telling us our brake light was out.
Any/all input would be greatly appreciated

thanks
 

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Just as an update:

my rear passenger light started working again out of the blue. Right now the only thing I can think of is that some moisture seeped through the bumper when I washed the car the other day which cars caused it to malfunction. I’m not 100% sure but that’s the only plausible cause as of right now. I will be washing the car again to see if I can replicate again and when I do I’ll report back.
What’s really weird is the fact that we never got an error message.
Either way, hopefully we can eventually pinpoint a cause.
 

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Are you using a pressure washer to bathe your Macan? IIRC, the tail lamps have seals where they mate with
the sheet metal in order to keep out water, dust, etc.
 

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Actually I didn’t use a pressure washer this time to wash my car. Usually I do, but I didn’t have time for a detailed wash so I did a quick one without it. Planning on washing it again this weekend while the weather is good so we will see if it happens again
 

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So I went to go wash my car today and before I got started I asked my wife to pull the car out in order to make sure the rear passenger brake light worked beforehand.
Come to find out, the rear brake light wasn’t working again although no message has appeared on dash and led lights do light up for other functions (turn signal, emergency lights, unlock/locking car)

banging head against the wall

this is frustrating not knowing what is causing this.
 

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So I went to go wash my car today and before I got started I asked my wife to pull the car out in order to make sure the rear passenger brake light worked beforehand.
Come to find out, the rear brake light wasn’t working again although no message has appeared on dash and led lights do light up for other functions (turn signal, emergency lights, unlock/locking car)

banging head against the wall

this is frustrating not knowing what is causing this.
Hi. I know its been awhile since you posted this, but I'm having the exact issue with my right rear brake light with no dash board message indicating brake light fault. I was wondering if you have discovered what was wrong and if the dealer found a fix. Thanks in advance.
 

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Hi. I know its been awhile since you posted this, but I'm having the exact issue with my right rear brake light with no dash board message indicating brake light fault. I was wondering if you have discovered what was wrong and if the dealer found a fix. Thanks in advance.
I have not. It really hasn’t worked at all again since the temperature has dropped here in TN so I’m not sure if that has something to do with it. I recently upgraded my bi-xenon headlights to the LEDs, so I’m a little short if money to spend it on diagnosing what might be the problem. Hopefully someone has figured it out and will help us out. I’m debating between just buying new rear headlights and changing them myself or having and independent mechanic diagnose the problem. Once I eventually figure it out I plan on positing it here. Hope the same for you :)
 

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I had the opposite problem, get a light fault message but all the lights were working perfectly. Porsche couldn't clear the fault, and ended up changing the light. All good thereafter.
 

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I’m hoping our situation has a simple fix like that. I have a feeling it’s much more complicated. Waiting to see what Tigas reports back.
 

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So the dealer wants to charge 1400.00 to change the tailgate and body right rear light assembly led. I remember when fixing my rear break light was a 5 dollar bulb. What kills me is the led in the assembly works. It just doesn’t turn on when you depress the brakes. Will probably let the dealer deal with the headache.
 

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Came here after searching for a fix for the same exact problem. 2015 Macan S. Rear right brake light is out, everything else works, no warning light. Live in PA and it happened in mid-December last year. Brought it to the dealership to have it checked out (inspection was also due). Charged me for running diagnostic which obviously did nothing. Starting taking it apart and poof...started working. Didn't give us problems the entire year. Then this year, when the inspection is up again in late December, stopped working again. Brought it to a mechanic, wasn't sure what to do with it so he told me pick it up. Was pulling it out of his garage, the light worked. Was driving it home (was going to drive it right to a shop to have it inspected), and it stopped working again. Left it sitting in my garage for a few days, and now it's working again. Seems like in the cold weather something happens. Makes me think there is condensation somewhere that is freezing and preventing the light from working. Really not any reliable mechanics in my area knowledgable enough to work on Porsche and I’m sure the dealership will burn a hole in me. If I find anything out I'll post here. Hope everyone else does the same!
 

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Thank you @kjones445. Yeah, it seems like maybe the weather has something to do with it but it’s annoying having people stop to tell you your brake light is out. I hope @Tigas finds something out soon from the dealership. I don’t have any reliable mechanics I can trust here as well. Crossing my fingers it’s something simple
 

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Well I got my car back from dealer today. I decided to buy a set of dark tinted rear tail lights from suncoast. They were on sale. Dealer installed and performed 2 service campaigns on front passenger seat sensor mat and fuel pump flange. They could not find a cause other than failure of the tail light. Hopefully this set lasts longer than 5 years.
 
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