Boigevis Trading (guangzhou) Co., Ltd.
| Size | Standard size |
| Point Of Origin | Guangdong, China |
| OE NO. | 4M0121321K |
| Packing | Boigevis packing |
| Delivery Time | 3-7work day |
| Quality | High Quality |
| Brand | Boigevis |
| Payment Terms | L/C,D/A,D/P,T/T |
| Warranty | 12 Months |
| Packaging Details | Normal |
| Item Name | Coolant Reservoir Cap |
| Shipping Way | DHL UPS FEDEX EMS TNT |
| Car Model | for Q5L A8 Q7 |
| Model Number | 4M0121321K |
| Place of Origin | China |
| Brand Name | BOIGEVIS |
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Product Specification
| Size | Standard size | Point Of Origin | Guangdong, China |
| OE NO. | 4M0121321K | Packing | Boigevis packing |
| Delivery Time | 3-7work day | Quality | High Quality |
| Brand | Boigevis | Payment Terms | L/C,D/A,D/P,T/T |
| Warranty | 12 Months | Packaging Details | Normal |
| Item Name | Coolant Reservoir Cap | Shipping Way | DHL UPS FEDEX EMS TNT |
| Car Model | for Q5L A8 Q7 | Model Number | 4M0121321K |
| Place of Origin | China | Brand Name | BOIGEVIS |
Designed for Audi models including the Q5L, A8, and Q7, the coolant reservoir cap with part number 4M0121321K is a critical component that maintains proper pressure within the engine cooling system . By sealing the expansion tank, this cap raises the coolant's boiling point to prevent overheating and ensures stable engine temperatures for reliable performance .
Manufactured to original equipment specifications, this cap features a threaded design with a 23 PSI pressure rating and is constructed from high-strength plastic for durability . It is a direct-fit replacement compatible with a wide range of Audi models built on the MLB platform, including the Q7 (4M, 2016+), Q8, Q5 (B9, 2018+), A6 (C8), A7, and A8 (4N) . The part number 4M0121321K supersedes earlier references including 4M0121321H and 4M0121321J, and serves as a cross-reference for 4M0121321Q in some applications .
A faulty or worn cap can cause coolant loss, engine overheating, or bubbling in the reservoir. Replacing a defective unit with this premium 4M0121321K cap restores proper cooling system pressurization and reliable engine temperature regulation . Please confirm compatibility with your specific Audi model, chassis code, and production year before ordering to ensure accurate fitment.
Company Details
Business Type:
Manufacturer
Year Established:
2008
Total Annual:
10000000-50000000
Employee Number:
150~200
Ecer Certification：
Verified Supplier
Boigevis trading （GuangZhou）Co., Ltd is a company specializing in the sale of engine parts. Our main service models are Germany car. We have been focus on engine parts for many years and are the Leading global engine system integrator. Both research and development and sales are among the best ... Boigevis trading （GuangZhou）Co., Ltd is a company specializing in the sale of engine parts. Our main service models are Germany car. We have been focus on engine parts for many years and are the Leading global engine system integrator. Both research and development and sales are among the best ...
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