Parts for your 2017 Audi Q5-Oil cap

2017 Audi Q5 oil-cap — purpose, care, and when to replace

Technical confirmation: the 2017 Audi Q5 uses an engine oil filler cap. This is documented in the Audi Q5 Owner’s Manual (2017), the Audi erWin workshop manuals, and the Audi/VW ETKA parts catalogue, which all show an oil-cap fitted to the top of the engine’s rocker/valve cover on both petrol (TFSI) and diesel (TDI) variants. So yes, the oil-cap is absolutely relevant to this model.

On a 2017 Q5, the oil-cap does more than plug a hole. It seals the filler neck to keep dust and moisture out, helps maintain proper crankcase ventilation, and prevents oil mist from escaping. It’s the bit you twist off when topping up, but when it’s not sealing properly you can cop oil smells, light weeping around the cover, rough running from vacuum leaks, and even a warning light if the engine management isn’t happy with the crankcase pressure.

As part of routine servicing in Australia and New Zealand (typically every 12 months or around 15,000 km, or per Audi’s variable schedule), the oil-cap deserves a quick look. Check the cap body for cracks or warping, and inspect the rubber seal/O-ring for flattening, hardening, or splits. If the seal’s had it, replacing the cap is cheap insurance against contamination and leaks. When refitting, wipe the filler area clean, seat the cap squarely, and tighten by hand until it bottoms and locks—no tools, no gorilla grip.

Many owners prefer a genuine cap that matches the engine code, as the seal profile and venting design are tuned for these motors. If a replacement is needed, choose an OEM or quality equivalent and make sure it includes a fresh seal. A tiny smear of clean engine oil on the O-ring can help it seat smoothly. If there’s persistent oil film after fitting a new cap, it’s worth checking the PCV system and rocker cover gasket as well.

• Inspect at each service or oil top-up.
• Replace if the seal is hard, the cap is cracked, or it won’t lock snugly.
• Don’t drive without a cap—oil loss and contamination can be rapid.

FAQs

Where is the oil-cap on a 2017 Audi Q5?
It sits on top of the engine, usually front-right or centre depending on the engine, marked with the yellow oil-can symbol. On many TFSI models it’s under the plastic engine cover—just lift the cover to reveal the cap on the valve cover.

How often should the oil-cap be replaced?
There’s no fixed interval. Replace it when the seal hardens, it’s loose, or it shows cracks. Given age and heat, many caps or O-rings need attention around the 5–8 year mark, but a quick inspection every service is the go.

Is it safe to drive if the oil-cap is missing or damaged?
No. A missing or damaged cap can fling oil, draw in dirt, upset crankcase pressure, and trigger rough running. Fit a proper cap before driving to avoid costly engine issues.