Where is the engine number located on an older Audi A6?
2 Answers
The engine number of an older A6 is generally located on the lower left side of the engine, sometimes on the side of the cylinder block near the flywheel, usually consisting of a combination of 7 to 8 digits and letters. In addition to the above method, the engine number can also be checked in the following 4 ways: The vehicle's driving license contains the engine number, usually located on the second-to-last line; The motor vehicle registration certificate will indicate the engine number; The purchase invoice will indicate the engine number; The vehicle purchase tax payment certificate will indicate the engine number. It is important to note that the engine number is not the same as the engine model. The engine model refers to the specification and size of the engine within the manufacturer, and engine models can be the same. The engine number refers to the production number of the engine, with each engine having only one unique engine number, and no two engines share the same number.
I remember spending nearly an hour searching for the engine number when transferring ownership of our old A6 at the DMV. Later, a mechanic taught me to first open the engine hood and look near the connection between the engine and transmission. The older C5 and C6 models differ slightly – for those from the 1990s, you'd need a flashlight to illuminate the lower rear of the engine, where there's a small platform near the firewall. For the 2.4L V6 models, it's usually on the side of the right cylinder block, requiring you to slightly bend the intake hose for a clear view. If it's a post-2000 turbo model, the number might be hidden above the exhaust pipe. The trickiest part is when some cars have accumulated grime, requiring carburetor cleaner spray to reveal the number. When making a rubbing, avoid regular paper – the DMV's special blue rubbing paper is less likely to tear.
