Help With Transmission Splash Shield Rear Retainer Clips

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Hey guys. I purchased a 2023 Audi A4 from the dealership with 26k, and I ended up belatedly realizing it came with the following issue:

• The transmission splash shield is missing. I purchased a new one on eBay, and I found screws that will work for all holes except the rearmost 2 that actually attach to the transmission. The hole is very large for these two, and I'm having trouble finding expanding clips that are big enough to expand into this hole, and also cover the diameter on the shield itself. I found a 60-pack retainer clip kit at Autozone that has 2 in it that should work, but the whole kit is 30 bucks, and I'm not 100% sure they'll work so I held off. According to the online OEM shops, This is the rivet I need. However, I can see from the image that this is way to small.

 

I was hoping someone could post a picture of the undercarriage showing how these two holes are fastened. I feel like I'm missing something here, because the holes are just too large on the transmission.

There was some other issues also, but I'll save those for another post (dealership screwed me on this one. My fault for not being available to inspect the car myself. Can't trust people it seems).

Thanks!

[Sid2020]

Them holes have very large plastic clips that go  thru the above tray and the mid section tray, they are reusable 

[Sid2020]

[PushStart]

@Sid2020

Thanks for the response. It just didn't look that big in the picture, but I'm going to go ahead and order a few. However, could you explain what #18 is in this diagram?

[Sid2020]

That trim may it be applicable to Every model, looks like A small plastic air deflector. some have another tray that connects onto them 2 fixings