Shop 2021 Audi A5 Engine Coolant Reservoir Cap. 2.5 LITER, AUXILIARY. 4.2 LITER, RETURN. 4.2 LITER LITER, RETURN, VIN - OEM Audi Part # 8J0121324 (8J0-121-324)

Engine Coolant Reservoir Cap. Plug.
A cover that prevents foreign debris from entering the container. Included with: Lower hose.

Engine Coolant Reservoir Cap

Fits A8, S4, TT, TT RS, TTS

2.5 LITER, AUXILIARY. 4.2 LITER, RETURN. 4.2 LITER, RETURN, A4/S4. 6.0 LITER, RETURN, FROM VIN 4E6011643. 6.0 LITER, RETURN, TO VIN 4E6011642.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.