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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Fitting Position | Left |
| Fitting Position | Centre |
OE numbers (1)
Search by this OE number to find compatible parts
- BMW / MINI—1111 8 511 205
Where this part fits
Original-fit position for OE 11118511205. The red ring marks where this part installs on the vehicle.
About this product
The TOPRAN Coolant Flange (503 478) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Fitting Position: Left, Fitting Position: 74, Fitting Position: M, Supplementary Article/Supplementary Info: 35. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BMW, MINI models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 001-10-27753, 08.19.307, 1111 8 511 205, 16565BW and 31 more. Matching these numbers confirms a like-for-like replacement with no loss of function. TOPRAN is a recognised supplier of automotive replacement 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.
Coolant Flange buying guide
Why replace this part?
Coolant outlet flanges and pipe connectors direct coolant flow through the engine circuit. Plastic flanges crack from thermal cycling; metal flanges develop pinhole corrosion. Either causes coolant loss and overheating.
Signs you need a replacement
- Coolant leak at a pipe junction on the engine
- white crystalline deposit around a fitting
- rapid coolant consumption
- overheating
- steam under the bonnet
When to replace
Inspect every 60,000–80,000 miles. Plastic flanges are a known weak point — replace proactively during major cooling system work.
About TOPRAN
TOPRAN, part of the Hans Thomsen Group headquartered in Hamburg, Germany, is a growing independent aftermarket brand focused on providing quality parts at accessible prices. TOPRAN offers a comprehensive range covering engine, cooling, electrical, braking, and body components for European vehicles. All TOPRAN products are manufactured to meet OE specifications and undergo quality testing before distribution. Combining German quality management with competitive pricing, TOPRAN is an excellent choice for cost-conscious motorists and workshops who do not want to compromise on part quality.
Suitable cars
Equivalent products (37)
Show all 37 OE numbers
Coolant Flange TOPRAN 503 478 — compatible car models
| Car models | BMW: 1 (F20), 1 (F21), 2 Active Tourer (F45), 2 Convertible (F23), 2 Coupe (F22, F87), 2 Gran Tourer (F46), 3 (F30, F80), 3 Gran Turismo (F34), 3 Touring (F31), 4 Convertible (F33, F83) (+13 more); MINI: MINI CLUBMAN (F54), MINI Convertible (F57), MINI COUNTRYMAN (F60), MINI (F55), MINI (F56) |
|---|---|
| Engines | 118 d; 214 d; 218 d; 316 d; 318 d; 420 d; 418 d; 518 d; 520 d; 630 i; 725 d, Ld; sDrive 16 d; sDrive 18 d; xDrive 20 d; sDrive 25 d (+1 more) |
| Year of manufacture | 2009-2022 |
| Manufacturer article number (MPN) | 503 478 |
| OE part numbers | 1111 8 511 205 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 503478 . Fitting Position: 74. Fitting Position: L. Fitting Position: M. Supplementary Article/Supplementary Info: 35
- 1x Coolant Flange
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 Coolant Flange compatible with my car?
This Coolant Flange fits BMW, MINI 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 TOPRAN Coolant Flange have?
This TOPRAN Coolant Flange has the following specifications: Fitting Position: L; Fitting Position: 74; Fitting Position: M; Supplementary Article/Supplementary Info: 35. Check the full specifications table above for complete details.
What OE part numbers does this Coolant Flange replace?
This Coolant Flange replaces OE part numbers: 1111 8 511 205. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Coolant Flange cost?
This TOPRAN Coolant Flange is available for £11.99. Coolant Flange prices vary depending on brand, specifications, and vehicle compatibility. TOPRAN parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Coolant Flange?
Regular inspection of your Coolant Flange 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 Coolant Flange?
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 Coolant Flange fitted by a professional mechanic.
Can I use this part as a replacement for OE 1111 8 511 205?
Yes, this TOPRAN Coolant Flange is a direct replacement for OE part number 1111 8 511 205. 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.
