Throttle Body Solution for a Early Audi 4.2L V8
Our 2000 Audi A6 4.2L V8 loaner car had a throttle body (TB) fail on it a few weeks ago and we needed a Throttle Body Solution.For the life of us, we could not find a ne, let alone a used unit. After searching the internet on and off for days end, we finally found a compatible throttle body. Apparently the Porsche 986 996 997 & GT3 uses the exact same 75mm housing. This is Part Number: 997 Same bolt pattern and casting for a 4.2L V8 – 2000 Audi A6. It’s also the same throttle body for a 2000, 2001, 2002 and 2003 Audi A8.
Harness Pin Outs
The only a few slight differences that we found. Our throttle body and the Porsche TB both have 6 pin connectors. Although, the Audi pins are an even 6 pin pattern and the Porsches are an offset 6 pin pattern. This makes the connectors non-interchangeable. Also the pin outs are different. They are not a 1 to 1 pin out. As a result, I had to build a pigtail to plug directly into our harness. I could have repinned the OE harness with a different connector, but that was more work. After finding this out, I pulled the wiring diagrams from both vehicles and the schematics for the internal units are exactly the same. The wires got to different pin numbers. The wiring diagram for the pigtail is shown below.
Connectors
As noted above the connectors are completely different, with a different patterns. The 75mm Porsche 911 throttle body uses this part found on Amazon. There is no part number that would could find in the Porsche parts catalog. But this part fitd perfect. For the Audi side of the pigtail, we purchased this kit, also on Amazon. We only needed the male part of this, but found it less expensive to purchase both sides. The other side can be saved for another project or ‘just in case’ situation.
Part Numbers
There are a few different 75mm Porsche throttle body part numbers that can be referenced. VW, Porsche and Bosch use different part numbers, however they all are the same part. The Porsche number, seen in the photo, is 997 605 115 01 / 99760511501. The Bosch part number 0 280 750 474 / 0280750474. The VW part number is 002 133 062 AJ / 022133062AJ, although no VW pr Audis that we know of uses this part. Porsche is owned by VW so naturally they put a VW part number on there. Fairly common throughout the history of VW, Audi and Porsche partnerships.
This throttle body bolts directly onto a stock 2000 Audi A6 and 2000-2003 A8s intake manifolds. With a custom built pigtail harness, will plug directly into the harness for the stock part number which was 077 133 062 / 077133062. This part number is NLA and is impossible to find new or used.
Performance Throttle Body Solution
Another thing that we noticed, the 2001 and up V8 Audis have a smaller throttle body plenum. This is either 65mm or 70mm. Unfortunately we ordered three different throttle bodies, and found this out the hard way. Furthermore, the bolt pattern on these is different. The inside plenum is also too small and would drastically reduced performance on our 2000 Audi A6 – if it happened to fit the bolt pattern, which they did not.
The part numbers that do not fit are the following: Bosch 0 280 750 487 / 0280750487 – Audi: 079 133 062 C / 079133062C. However, if you have a 2001 A6 / S6, A8 / S8, etc., with a smaller throttle body, this would be a great performance upgrade. We found a few companies online that sell the manifold and throttle body kits to install on a later model. You also might be able to hone out your stock manifold to open up to a 75mm opening. Although, you would need a adapter plate as the bolt pattern is slightly different.
For more information on how to get your Audi A6, 4.2L V8 Audi or any vehicles listed above, in the shop for service, maintenance or custom work, contact us at 425-254-0627. You can also schedule an appointment or receive a quote by clicking here. Meister Werks European & Import is located one block south from The Renton Landing in Renton, WA, across the street from the former Boeing Store and at the westside of the Paccar / Kenworth plant.