992 Rearview mirror rattle / buzz?

[Tom]

I finally found the source of a vibration/buzz I get on certain rough roads. There's a pretty strong vibration in the rearview mirror, which creates a rattle/buzz that I can stop by just holding the mirror. Took me a long time to find this one because it only happens over certain roads and sounds like it could be coming from anywhere on the dash. Anyone else have this? I've love to slather it with Krytox, but not sure how it comes apart? Anyone have any 992 rearview mirror insights?

[D_Frost]

I took apart the rear view mirror assembly over the weekend to install an integrated dashcam. I used the installation video from the vendor and they might be helpful in your endeavors.

Link to 992.1 -
Link to 992.2 -

[Tom]

@D_Frost -- those are awesome videos that I somehow missed until now. Thank you so much for posting them. I was searching all over YouTube to see how to get that panel off (the one shown in the pic below) and your videos are by far the clearest on that point. I'm just a bit curious why/how it seems to come off so easily? On my car, I've pried fairly hard and it won't budge. Am I just being too cautious? Are you pulling the front lip down, or pushing it toward the windshield? I ask because I finally discovered that it is that trim panel and not the mirror itself that is buzzing. I can put one finger on it to stop the buzzing, so want to get it off and slather the backside in Krytox to make it quiet.

rattle-trim.jpg (151.55 KiB) Viewed 1232 times

[D_Frost]

When I took mine out, it took considerable effort to pop off towards the windshield / front of car… there should be only 2 fasteners holding the shroud (they are roughly located in front of the map lights). I was able to do this based on previous experience on my Taycan (which should be the same as the 992.1).

I did notice the panel comes off much easier after you have removed it before.

[Tom]

Thank you. I'll try again tomorrow. YouTube is full of videos that make things look easier than they are. That second video where they just nudge the panel off is classic YouTube!

[Tom]

With thanks to @D_Frost I was able to get the trim off to deal with the buzz. Those clips were TIGHT! The part number is 992867589B (black) and it's under $50, so cheap enough if you break it. The good news is that -- at least in my testing so far -- the buzz is finally gone! All hail Krytox!

There are two clips that essentially hold the entire piece on (see blue arrows below), one on each side. To unclip them, you need to apply force straight back, as if trying to push the trim panel through the windshield. (Don't pull the edge down, push it forward.) On my car, the driver side came loose with about the amount of force you might expect, but the passenger was really locked on there. The amount of force exceeded my "I'm gonna break it" Spidey-sense, but fortunately nothing broke as best I can tell.

mirrir-trim-off.jpg (526.19 KiB) Viewed 1190 times

The blue arrows below point to the jaws of death clips holding the trim panel in place. The green arrows show the dowel/cone and hole arrangement that together guide the piece into alignment. The red arrows point to the secondary clips/hooks up by the windshield. Just be sure the tab on the trim piece slides under the plastic hook above, so that the trim piece is pulled tight to the windshield. It's pretty obvious when you miss them. This picture shows the right side, but the left side is exactly the same.

mirror-trim-clips.jpg (1.12 MiB) Viewed 1190 times

Here's a shot (from eBay) showing the rubber strap that tethers the piece to the roof. I ended up applying Krytox with the trim still tethered to the car. There was no obvious release mechanism for the rubber strap. I suspect it just pulls out with more force than I was comfortable with (unlike the videos showing straps that can be unhooked). For my purposes, I had all the access I needed, so opted not to push my luck with the strap.

mirroe-strap1200.jpg (157.94 KiB) Viewed 1183 times

To actually quiet the buzz, I applied Krytox to just about every part of the trim piece that comes into contact with anything -- so on the clips and alignment pin in front, and the hooks by the windshield, as well as all the way around the inner edge of the trim -- almost like applying gasket sealer trying to make the trim piece water tight. A dealer tech turned me on to Krytox a few years ago, and it's by far the best anti-rattle lubricants I've ever used. You can put it on anything too -- leather, plastic, vinyl, etc. Not cheap, but great stuff!

krytoxSpecs.jpg (248.59 KiB) Viewed 1190 times

[D_Frost]

Nice! Glad you were able to get that trim. As for the rubber strap, you can actually Tetris it out... there's a roughly an I-shaped hole on the console side that you can rotate the flat strap (vertically) and extract it.

[blueline]

@D_Frost

Now my big question: I know the Fitcamx looks and mounts wonderfully - stealthy too. But, more importantly, how good a camera is it? Video quality is paramount for me. I don't care about GPS, having a rear or interior facing camera, device in-car display, any while-parked functionality, crappy apps, etc.

All I want is a very good camera with a decent chip and CMOS image sensor that captures details well (ie: license plates). Memory card is a must as I prefer using a PC for most things.

Thanks in advance for any feedback!

[D_Frost]

I had the FitcamX on my Taycan and the video was good enough, however, it really needed a circular polarizer as the windshield reflection was pretty obvious in various lighting situations. So for my 992.2, I ended up getting their circular polarizer. It did help quite a bit with reflections but it dims the image a bit.

As for the video quality, you will be able to grab higher resolution files directly from the memory card (reading it on a computer) than through the mobile app. The main thing the app is really useful for is initial setup / configuration and adjusting the polarizer (seeing if there's a reflection).

I went for a drive this morning, and it was an overcast day. I grabbed this screenshot from the video file directly on the computer. There definitely is some compression / artifacts but as long as the speed differential isn't too great, there is enough details.

[blueline]

I had the FitcamX on my Taycan and the video was good enough, however, it really needed a circular polarizer as the windshield reflection was pretty obvious in various lighting situations. So for my 992.2, I ended up getting their circular polarizer. It did help quite a bit with reflections but it dims the image a bit.

As for the video quality, you will be able to grab higher resolution files directly from the memory card (reading it on a computer) than through the mobile app. The main thing the app is really useful for is initial setup / configuration and adjusting the polarizer (seeing if there's a reflection).

I went for a drive this morning, and it was an overcast day. I grabbed this screenshot from the video file directly on the computer. There definitely is some compression / artifacts but as long as the speed differential isn't too great, there is enough details.

I opened your screenshot in a separate photo application on my PC and I can easily read the plate. Excellent feedback and advice. It seems that the FitcamX is the one - thank you so much!