Cap. Reservoir. Cover. Engine Coolant. Radiator.

Part Number: 1C9121321
Supersession(s): 1C9-121-321

A Cover that prevents foreign debris from entering the container. Location-Reservoir. Radiator Cap.

Radiator CapEngine Coolant Reservoir Cap

Fits Q7

3.0 LITER, MAIN. 3.6 LITER. 4.0 LITER. 4.2 LITER. 5.0 LITER, MAIN. DIESEL, MAIN. Touareg.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 2025 Audi Q4 Sportback e-tron to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.

Diagram RADIATOR & COMPONENTS. for your 2025 Audi Q4 Sportback e-tron
#10
Required: 1
4. 2 liter.
4.2 LITER. Reservoir cap.
Diagram RADIATOR & COMPONENTS. for your 2025 Audi Q4 Sportback e-tron
#9
3. 0 liter. Main. To reservoir. To upper hose.
3.0 LITER. MAIN.
Diagram RADIATOR & COMPONENTS. for your 2025 Audi Q4 Sportback e-tron
#10
Required: 1
3. 6 liter.
3.6 LITER. Reservoir cap.
Diagram RADIATOR & COMPONENTS. for your 2025 Audi Q4 Sportback e-tron
#10
3. 6 liter.
3.6 LITER.
Diagram RADIATOR & COMPONENTS. for your 2025 Audi Q4 Sportback e-tron
#9
Main. Diesel. To reservoir. To upper hose.
DIESEL. MAIN.
Diagram RADIATOR & COMPONENTS. for your 2025 Audi Q4 Sportback e-tron
#10
4. 2 liter. W/O towing pkg. W/TOWING pkg.
4.2 LITER.

Your Price

$ 55.48

Audi Huntsville

6972 US Hwy. 72 W., Huntsville, AL, 35806-1726