How to Repair an Audi/Volkswagen with a P2181 Engine Code. We would advise starting with the two main causes: bad CTS and stuck or bad thermostat. If you are wanting to take your car into the shop to get a diagnosis, remember you would be paying an hour of labor just for diagnosis, which can be anywhere from $75 – $150. The average price of a 2007 Audi S6 timing belt replacement can vary depending on location. Get a free detailed estimate for a timing belt replacement in your area from KBB.com Car Values Marcel gives a quick overview of our 4.0T Hybrid Turbo RS7 Upgrade.A perfect solution for S6/S7/A8 customers looking for a turbo replacement.Our solution rep 2016 Audi S6 - K&N DI, 10mm VCDS drop+12mm Spacers, Disc Italia+HPS 5.0 Not to be forgotten 2016 Audi A3 2.0T, 2006 Audi A4 Avant 2.0T, 2002 Audi A6 2.7T, MKIV VR6 GTI & GLI, MKIII GLX & GL Jettas Shady fix for around 2 dollars. Remove front O2 sensor. The rearmost O2 ensure you have enough wire slack to slide the cat about 8 inches back and down. Remove 4 nuts from the cat to turbo flange. On the bottom side of the car remove the main splash guard. remove 2 nuts on the exhaust coupling in behind the resonator. The customer also had coolant seeping from the two turbo coolant hoses at the joint where rubber meets steel line. The book says 17hours to pull the motor + parts, but that wasn't in the customer's budget. So after reading this post we decided to go for it and replace the lines from the top without pulling the motor. They will only install it if I bought it from the dealer. Searching through the forums, I’ve only seen one other member (jrmckinn) who had to replace the 5F Module at the dealer. These pre-owned 3G MMI Interface (P/N 4G0035746C) are readily available on eBay for $200-$600. Pricing for Other Common 2018 Audi S6 Repairs & Services. The average price of a 2018 Audi S6 transmission repair and replacement can vary depending on location. Get a free detailed estimate for a Z6cCdF4.