Teutonix

I've searched the archived posts and seen vague references, but nothing conclusive. I want to replace the control arms on a 2002 A6q 3.0, and I ordered a kit, but I want to be sure that I got the right parts before I dig into the job. My real question is: What changes at the VIN split in the middle of the 2002 model year? The vehicle in question was made after the VIN split, so it seems to be grouped in with the "late" 2002-2004 vehicles versus 1998-"early" 2002. I looked at the car, and it has aluminum uprights if that means anything. I've also seen reference to a 16mm vs 20mm taper on the front, lower ball joint. Is this part of the difference? In sourcing replacement parts, it also seemed to be important to note whether the car came with 16" vs 17"/18" wheels. What's the difference?

Thanks in advance.

massboykie

Hey Teu

I was putting this list together for myself the other day. Mine has the sport suspension and the 17" wheels so there is definitely a difference in the part number for the 16". These are all for mine so hopefully it will either confirm yours or show a problem.

Bushings
================================================== =================
4B0 407 515 - 4 Rubber mount Top Front and Rear
4D0 407 183 AB - 2 Rubber mount Bottom Rear to subframe
4D0 407 182 G - 2 Rubber mount Bottom Front to subframe
4D0 407 181 H - 2 Rubber mount Bottom Front - to shock

Top Bolt
================================================== =================
N 102 723 02 - 2 shouldered hex. nut,self-locking - M10
N 034 790 7 - 2 screw, hex. hd. M10X100
N 104 061 05 - 2 washer 20X10,5X2

Front Wheel Bearing - Housing
================================================== =================
4B3 407 253 G - 1 wheel bearing housing left - 82MM 17"/18"
4B3 407 254 G - 1 wheel bearing housing right - 82MM 17"/18"
8E0 498 625 B - 2 wheel bearing with mounting parts

Control Arms Complete (Front)
================================================== =================
4B3 407 151 C - 2 control arm Bottom Front 17"/18"
8E0 407 693 Q - 1 wishbone link Left Front Bottom Rear
8E0 407 694 Q - 1 wishbone link Right Front Bottom Rear
8E0 407 505 C - 1 upper link Left Front Upper
8E0 407 506 C - 1 upper link Right Front Upper
8E0 407 509 C - 1 upper link Left Rear Upper
8E0 407 510 C - 1 upper link Right Rear Upper

Here's the rest: http://www.vaglinks.com/Docs/Audi/C5...rt_Numbers.pdf

Hope that helps.

Cheers
Massboykie

MikekiM@PureMS

The lower straight control arm ball joint is what's different between steel uprights and aluminum uprights.

There aren't many kits on the market for aluminum upright vehicles. We're one of the few places that do have one specifically for them.

Tie rod ends are also different. 1-piece vs. 2-piece..

Teutonix

Thanks for the responses. I purchased a kit from a seller that specifically listed my application (2002 after the VIN split, 16" rims, 3.0 AVK engine), but of course I got the wrong front/lower arms. I need the 16mm taper, and I got the 20mm taper. Everything else fit just fine and looked just like the parts being replaced. I'm currently waiting for a response from the outfit that sold me the kit.

02AudiA6

Hi, I think I am facing the same problem. I got the kit and I got the wrong taper as you did. Did you find the right part? My OEM lower control arm has part number 4B3 407 155A marked on the part. Thanks in advance.

csouther

Does anyone know the difference in pinch pin diameters between the C5/B6 upper control arms and the D2 upper control arms? The bolt and pin diameter is what I am after. Are they the same? I'm trying to get adjustable upper control arms but no one makes them anymore and I want to see if I can just lengthen a set made for C5/B6. This is assuming the pinch pins are the same diameter. Any help on dimensions would be awesome. I'll be measuring my D2/A8 to see but if anyone has C5 info that would be very helpful.

Thanks!