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Details
| Specification | Value |
|---|---|
| Brand | RAP BRAKES |
| MPN | r-k0821 |
| Category | Brake calliper |
| Fitting Position | Rear Left |
| Brake System | BOSCH |
| for brake disc thickness [mm] | 11 mm |
| Distance of mounting bores [mm] | 80 mm |
| paired article number | R-K0820 |
| Piston Diameter [mm] | 40 mm |
OE numbers (1)
Search by this OE number to find compatible parts
- BMW—34 21 6 850 851
Where this part fits
Original-fit position for OE 34216850851. The red ring marks where this part installs on the vehicle.
About this product
When brake calliper performance matters, the RAP BRAKES R-K0821 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Fitting Position: Rear Left, Brake Caliper Type: Plastic, Material: Polyurethane, Brake System: BOSCH, for brake disc thickness [mm]: Bronze mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with BMW vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 1275093, 13012115101, 17604303, 182001 and 45 more. Matching these numbers confirms a like-for-like replacement with no loss of function. RAP BRAKES is a recognised supplier of automotive braking components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (52)
Show all 52 OE numbers
Brake calliper RAP BRAKES R-K0821 — compatible car models
| Car models | BMW: 1 (F20), 1 (F21), 2 Convertible (F23), 2 Coupe (F22, F87) |
|---|---|
| Engines | 114 d; 218 d |
| Year of manufacture | 2011-2021 |
| Manufacturer article number (MPN) | R-K0821 |
| OE part numbers | 34 21 6 850 851 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
RAP BRAKES r-k0821 Brake calliper. Brake Caliper Type: 6. Brake System: BOSCH. Distance of mounting bores [mm]: 80 mm. Fitting Position: HL. for brake disc thickness [mm]: 11 mm. Material: 13. paired article number: R-K0820. Piston Diameter [mm]: 40 mm
- 1x Brake calliper
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Brake calliper compatible with my car?
This Brake calliper fits BMW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this RAP BRAKES Brake calliper have?
This RAP BRAKES Brake calliper has the following specifications: Fitting Position: HL; Brake Caliper Type: 6; Material: 13; Brake System: BOSCH; for brake disc thickness [mm]: 11 mm; Distance of mounting bores [mm]: 80 mm. Check the full specifications table above for complete details.
What OE part numbers does this Brake calliper replace?
This Brake calliper replaces OE part numbers: 34 21 6 850 851. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Brake calliper cost?
This RAP BRAKES Brake calliper is available for £40.99. Brake calliper prices vary depending on brand, specifications, and vehicle compatibility. RAP BRAKES parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Brake calliper?
Regular inspection of your Brake calliper is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Brake calliper?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Brake calliper fitted by a professional mechanic.
Can I use this part as a replacement for OE 34 21 6 850 851?
Yes, this RAP BRAKES Brake calliper is a direct replacement for OE part number 34 21 6 850 851. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
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