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Febi 46221 Radiator Cap
| Brand | Febi 46221 |
|---|---|
| Material | Plastic |
| Filler Neck Outside Diameter | 88.0 |
| Article Version | New implementation |
| Colour | Black |
| Material | Plastic |
| Outer Diameter (mm) | 88.0 |
| Outside Thread | M52 x 3 |
| Pressure (Bar) | 1.4 |
| Fits | BMW · 1 vehicle |
OE-style replacement. Direct-fit radiator cap with a 1.4-bar pressure rating.
Plastic construction. Lightweight black cap with an M52 x 3 outside thread.
New implementation from Febi for dependable cooling-system sealing.
Cross-references 17 11 7 521 071 and 17 11 7 639 020 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Radiator Cap for BMW Cooling Systems
Febi 46221 is a black plastic radiator cap built for BMW cooling system service where the filler neck and pressure rating must match the original specification. It features an 88.0 mm outer diameter, M52 x 3 outside thread, and a 1.4 bar pressure rating for the listed application.
Fits 2020 BMW X6, N/A. This Febi 46221 radiator cap also cross-references BMW part numbers 17 11 7 521 071 and 17 11 7 639 020 for the same application.
Key Features
- Brand: Febi
- Part number: 46221
- Radiator cap for BMW cooling system service
- Plastic construction with black finish
- 88.0 mm outer diameter / filler neck outside diameter
- M52 x 3 outside thread
- 1.4 bar pressure rating
- Article version: new implementation
Product Details
Febi 46221 is a radiator cap specified for the 2020 BMW X6 application listed in the fitment data. The cap’s 88.0 mm outer diameter, M52 x 3 thread, and 1.4 bar pressure setting are the key dimensions to verify when replacing a worn or incorrect cap on the vehicle’s cooling system. Using the correct radiator cap helps maintain the system’s designed pressure level and sealing interface at the filler neck.
For buyers searching for a BMW X6 radiator cap, Febi 46221, or an OE-style replacement with M52 x 3 threading, this part provides a direct reference point for matching the listed application. The black plastic construction and new implementation version align with the supplied product data.
Common Issues This Part Addresses
- Damaged or worn radiator cap sealing surfaces
- Incorrect pressure retention in the cooling system
- Fitment mismatch at the filler neck thread
- Coolant loss from a cap that no longer seals properly
- Replacement needs for a specified BMW X6 cooling system cap
Installation Notes and Tips
Confirm the filler neck outside diameter, M52 x 3 thread, and 1.4 bar pressure rating before installation. Inspect the radiator neck and sealing surfaces for damage, debris, or corrosion, and make sure the cap seats fully and locks into place without forcing it. If the cooling system has been opened, verify coolant level and check for leaks after the engine reaches operating temperature.
Quality Assurance
Febi supplies replacement parts for European vehicle applications, and this radiator cap is listed with exact dimensional and pressure specifications to support accurate fitment selection. Verify the vehicle application against the part number 46221 and the provided BMW cross-reference numbers before installation.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2020 | BMW | X6 | N/A | Article version: new implementation; Outside Thread 1: M52 x 3; Outer Diameter 1 (mm): 88; Material: Plastic; Colour: black / yellow; Pressure (Bar): 1.4 |
| No rows match your filter. | ||||