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Discussion Starter · #1 ·
Well, I found that the mirror's turn signal really is bad. Starting a separate thread because it's a separate topic that will have diverging follow up posts.

I swapped it with the turn signal from the Passat and the good one worked on both cars, the bad one worked on none. I think 1 LED failed or a solder broke because 3 LED still light up dimly. The unit is sealed so there are no bulbs to replace.

The mk4 Passat B5.5 uses the same side view mirrors. I noticed a few differences vs. the mk5 Jetta parts.

The wire to the turn signal doesn't have a keeper on the Jetta. The passat has a little peg/hole that holds the wire.

The Passat uses phillips screws, the Jetta uses T10 torx screws.

The OEM part was cheap enough so that I just ordered a new one online. They sell copycat parts on ebay but it wasn't worth it to buy a pair or buy one and end up with one that side that looks different from the other.
 

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Discussion Starter · #2 ·
Finished the writeup. It requires total mirror disassembly because one of the screws cannot be reached. It was pretty easy although I sliced my finger on a sharp edge. That's always fun.

http://www.myturbodiesel.com/1000q/a5/turn-signal-side-mirror-replacement-jetta.htm

Here's what's in the turn signal.


There are 3 LEDs. The circuit board and contacts were corrorded due to moisture entering the turn signal. It's a sealed unit and I noticed a strong scrape on the turn signal plastic which wasn't there on older pics of the car. My best guess is that someone hit it in the parking lot with their car or shopping cart which broke the turn signal seal and let water in.


Refer to the link above for full details.
 

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Discussion Starter · #8 ·
You're welcome!

It's surprisingly hard too. I'm not sure about the sportwagen but the 2010 Jetta is a little different. It doesn't have the black trim ring inside the colored housing cover.

Can you confirm if the 2010 Sportwagen has the round trim (second from right) or not?
 
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