Parts for your 2019 Audi Q5-Oil cap

2019 Audi Q5 Oil Cap — purpose, servicing and replacement

Based on technical sources including the 2019 Audi Q5 Owner’s Manual, Audi erWin workshop information, and the Audi ETKA parts catalogue, the 2019 Audi Q5 (FY) is fitted with an engine oil filler cap. It sits on the top of the engine (usually on or near the cam/rocker cover), marked with the oil-can symbol. Both the 2.0 TFSI petrol and 2.0 TDI diesel engines use a conventional screw-type oil cap. So yes—the oil-cap is absolutely relevant for this model.

The oil cap does more than just give a spot to pour oil. It seals the engine’s crankcase to keep dust, moisture, and grime out, while helping maintain proper crankcase ventilation behaviour. A good cap prevents oil fumes escaping under the bonnet, avoids messy oil mist around the engine, and stops unmetered air leaks that can upset idle and fuel trims on modern Audi engines. It also acts as a handy reminder of the correct oil specification to use when topping up—owners should always follow the spec printed on the cap and in the handbook (e.g., the relevant VW/Audi standard for their exact engine).

As part of regular servicing of a 2019 Audi Q5 oil-cap, a quick visual and tactile check goes a long way. With the engine cool, remove the cap, wipe the seating area, and inspect the cap’s seal. Most caps have an integrated rubber O-ring, if it’s brittle, flattened, cracked, or missing, it’s time to replace the cap. Refit by hand and tighten until it seats—no tools needed, and don’t overdo it.

• Replace the oil-cap if it’s cracked, warped, cross-threaded, or the O-ring is perished.
• Watch for symptoms like oil smell, oily residue near the cap, rough idle, or a check engine light—these can point to a poor seal.
• When topping up, clean around the cap first, then add the correct oil spec in small amounts (typically 0.25–0.5 litre at a time), recheck the level, and refit the cap firmly.

Genuine and quality OEM caps listed in Audi’s parts catalogue are inexpensive and include the correct seal. Given how critical a tight seal is on these engines, replacing a tired cap is cheap insurance for long engine life and tidy servicing.

Popular questions

Where is the oil cap on a 2019 Audi Q5?
It’s on top of the engine, under the bonnet, usually visible after lifting off the plastic engine cover. Look for the yellow oil-can symbol. On the 2.0 TFSI, it’s near the front/centre of the rocker cover, on the 2.0 TDI it’s similarly placed for easy access.

What oil should be used when topping up through the cap?
Use engine oil that meets the VW/Audi specification shown on the oil cap and in the owner’s manual. Depending on engine and market, this may be a low-viscosity spec for modern TFSI engines or the approved long-life spec for TDI models. When in doubt, match the exact VW standard in the handbook and choose the correct viscosity for local climate.

How often should the oil cap be replaced?
There’s no fixed interval. Replace it whenever the cap is damaged or the seal is worn. During each service, check the cap for cracks and the O-ring for hardening or flattening. If there’s oil mist around the cap, a fuel smell, or a slight vacuum leak causing a rough idle, a fresh cap is an easy fix.