Shop 2017 Audi A5 Radiator Cap. 3.0L, PRIMARY. 4.0L, GT3 RS. 4.0L, GT3, PRIMARY. EXPANSION TANK CAP; 911 PRIMARY, Cooling - OEM Audi Part # 9P1121321A (9P1-121-321-A, 9P1121321)

Cap for expansion ta. Radiator Cap. Reservoir Cap.
Location-Reservoir. Radiator Cap.

Engine Coolant Reservoir Cap

Fits 911

3.0L, PRIMARY. 4.0L, GT3 RS. 4.0L, GT3, PRIMARY. EXPANSION TANK CAP; 911. PRIMARY.
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.