Genuine Audi Cap Reservoir Cap 3B0121321 OEM - Audi (3B0-121-321)
1998-2018 Audi - 3b0121321
Genuine Audi Cap Reservoir Cap 3B0121321 OEM - Audi (3B0-121-321)
1998-2018 Audi - 3b0121321
- Audi
- 3B0-121-321
Details
- Brand:
- SKU:
3B0-121-321
- Other Names:
Reservoir Cap, Radiator Cap, Engine Coolant Reservoir Cap, Cover
- Description:
Genuine Audi OEM Cap is a genuine factory replacement designed to seal and protect the engine coolant reservoir on compatible Audi vehicles. Also referred to as a Reservoir Cap, Radiator Cap, Engine Coolant Reservoir Cap, or Cover, this component plays a critical role in maintaining proper pressure within the cooling system, preventing coolant loss, contamination, and dangerous overheating. Unlike aftermarket alternatives, this Audi OEM Cap is manufactured to exact factory tolerances, ensuring a precise, airtight seal that matches the original design of your vehicle's cooling system. Aftermarket caps frequently fail to hold the correct pressure rating, leading to premature coolant boilover, leaks, or damage to surrounding hoses and components. With part 3B0121321, you receive the same component that left the factory with your vehicle, made from materials engineered to withstand prolonged heat cycles and resist degradation over time. Sourcing a genuine Audi OEM part like the 3B0-121-321 means you are not guessing on compatibility or quality — every dimension, pressure threshold, and material composition meets Audi's strict engineering standards. Whether you are performing routine maintenance or addressing a cooling system issue, choosing OEM ensures reliability from day one. Audi Henderson is an authorized Audi dealer, and this part comes backed by the manufacturer's warranty for complete peace of mind.
- Applications: 4.2L. 3.0L TDI. 2.0L, 3.2L. 1.4L Hybrid. 2.0L (2012-15). 2.0L (2016-18). 4.0L- MAIN COOLING SYSTEM. 3.0L GAS MAIN COOLING SYSTEM.
California Proposition 65
WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov - MSRP: $39.59
- Discount: $17.62 (44.5% off)
- Sale Price: $21.97
- Audi
- 3B0-121-321
Details
- Brand:
- SKU:
3B0-121-321
- Other Names:
Reservoir Cap, Radiator Cap, Engine Coolant Reservoir Cap, Cover
- Description:
Genuine Audi OEM Cap is a genuine factory replacement designed to seal and protect the engine coolant reservoir on compatible Audi vehicles. Also referred to as a Reservoir Cap, Radiator Cap, Engine Coolant Reservoir Cap, or Cover, this component plays a critical role in maintaining proper pressure within the cooling system, preventing coolant loss, contamination, and dangerous overheating. Unlike aftermarket alternatives, this Audi OEM Cap is manufactured to exact factory tolerances, ensuring a precise, airtight seal that matches the original design of your vehicle's cooling system. Aftermarket caps frequently fail to hold the correct pressure rating, leading to premature coolant boilover, leaks, or damage to surrounding hoses and components. With part 3B0121321, you receive the same component that left the factory with your vehicle, made from materials engineered to withstand prolonged heat cycles and resist degradation over time. Sourcing a genuine Audi OEM part like the 3B0-121-321 means you are not guessing on compatibility or quality — every dimension, pressure threshold, and material composition meets Audi's strict engineering standards. Whether you are performing routine maintenance or addressing a cooling system issue, choosing OEM ensures reliability from day one. Audi Henderson is an authorized Audi dealer, and this part comes backed by the manufacturer's warranty for complete peace of mind.
- Applications: 4.2L. 3.0L TDI. 2.0L, 3.2L. 1.4L Hybrid. 2.0L (2012-15). 2.0L (2016-18). 4.0L- MAIN COOLING SYSTEM. 3.0L GAS MAIN COOLING SYSTEM.
California Proposition 65
WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov Also Purchased
Vehicle Fitment
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|
AUDI HENDERSON
Welcome to Audi OEM Parts, your number one source for all things Audi. We're dedicated to providing you the very best parts and accessories, with an emphasis on OEM fitment.
You can order your Genuine Audi Cap Reservoir Cap 3B0121321 OEM (3b0121321) right now and have it delivered to your home or work in just a matter of days. Guaranteed to fit your 1998-2018 Audi vehicle and we also offer a VIN verification system at checkout.
If you would like to browse your vehicle's specific OEM parts catalog, you can do so by first selecting what model you drive.
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Audi
AudiOEMParts.com is operated by Audi Henderson, an authorized Audi dealership and part of the Findlay Automotive Group in Henderson, NV. We stock genuine Audi OEM parts and accessories for every model — A3, A4, A5, A6, A7, A8, Q3, Q5, Q7, Q8, TT, R8, e-tron, and beyond.
Every part ships directly from factory inventory with full Audi manufacturer warranty. No aftermarket substitutes. No compatibility guessing. Exact fit, every time.
Order online and ship nationwide. Same parts Audi technicians use, at authorized dealer pricing, with the speed of online ordering. Questions? Call 888-448-6114 or email [email protected].