For most 2013 Audi A4 models, the oil drain plug uses a metric M14 x 1.5 thread with a 17 mm hex head.
In practice, the A4 lineup for that year included a range of engines, such as the 2.0-liter TFSI gasoline and the 2.0-liter TDI diesel, with some markets offering a 3.2-liter V6. While VW Group standards generally keep the plug size consistent, regional engines and revisions can differ. The guide below highlights the common size and how to confirm your exact car.
Drain plug size and typical head you’ll encounter
The oil drain plug on the 2013 A4 is typically M14 x 1.5, and the head is commonly removed with a 17 mm socket or wrench captured by a standard flat drain plug.
- M14 x 1.5 thread size for the oil drain plug
- Hex head commonly requiring a 17 mm socket/wrench for removal and installation
This reflects the standard configuration found on most 2013 A4s across major markets. If your engine differs or you’re unsure, consult the official service manual or dealer for confirmation.
How to verify the size on your exact car
To confirm the specific drain plug size for your vehicle, follow these steps:
- Check the owner's manual or factory service manual for the exact drain plug size and torque specifications.
- Inspect the drain plug head: determine whether it uses a standard hex bolt head or an internal hex (Allen) socket, which can indicate different tool sizes.
- If manuals are unavailable, carefully remove the plug and measure the thread pitch with a gauge or compare to a known M14 x 1.5 bolt.
- Verify your engine code (e.g., 2.0 TFSI or 2.0 TDI) with VIN or label; the plug sizing can vary by variant.
Always install a new crush washer if required and follow the manufacturer’s torque specification to avoid leaks or thread damage.
Summary: The 2013 Audi A4’s oil drain plug is generally M14 x 1.5 with a 17 mm hex head, but you should verify against your exact engine and regional specifications using the owner’s or service manual or a dealership. Proper sizing ensures a leak-free oil change and preserves engine integrity.
What size is the oil drain plug on an Audi A4?
M14 x 1.50 universal style oil drain plug replacement.
What size socket do I need to remove a drain plug?
What size wrench do I need for my oil drain plug? The most common sizes are 14 mm, 15 mm, and 17 mm hex. Some vehicles use a 3/8-inch square drive or an internal Allen key (8 mm or larger). Check your owner's manual or measure the plug directly.
What kind of oil does a 2013 Audi A4 2.0 take?
5W-40, 5W-30, 0W-40, 0W-30 (All TEMPS) - If synthetic oil that meets the applicable Audi, Volkswagen oil quality standard with the recommended viscosity grade is not available in your area, be sure to use a viscosity grade suitable for the climate, season, and operating conditions that exist where the vehicle is used.
Are all oil drain plugs 14mm?
Most cars use oil drain plugs between 13mm and 17mm, depending on the brand. For example, Toyota and Honda typically use 14mm or 17mm, while Ford often uses 13mm or 15mm. Using a universal drain plug socket set like the BILITOOLS 23-Piece Kit ensures you always have the right size on hand.