What is the tightening torque on a 2004 Audi S4 oil drain plug?

The precise tightening torque for a 2004 Audi S4 oil drain plug isn't readily available in a single, universally accessible source. Service manuals often vary slightly, and the torque spec *might* also depend on the specific oil pan used (though this is less likely).

Instead of relying on an unknown specification, you should:

1. Consult your owner's manual: This is the most reliable source for your specific vehicle. Look for a section on maintenance or specifications.

2. Use a reputable online repair manual: Sites like alldata.com or repairpal.com (subscription services) often have detailed specifications. These are generally more accurate than free online resources.

3. Contact an Audi dealership or independent mechanic: They will have access to the correct specifications and can advise you on the proper tightening procedure. This is the safest option if you're unsure.

Important Note: Over-tightening the drain plug can easily strip the threads and damage the oil pan, leading to costly repairs. Under-tightening can result in an oil leak. Using a torque wrench is strongly recommended to ensure the correct amount of tightening.