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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Category | Radiator |
| Core Length [mm] | 601 mm |
| Core Width [mm] | 340 mm |
| Core Depth [mm] | 32 mm |
OE numbers (2)
Search by this OE number to find compatible parts
- BMW—1711 7 788 903
- BMW—1711 7 790 297
Where this part fits
Original-fit position for OE 17117790297.
About this product
The TOPRAN Radiator (502 277) 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: Core Length [mm]: 601 mm, Core Width [mm]: 340 mm, Core Depth [mm]: 32 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BMW 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: 001-10-31707, 003-60-10227, 004-017-0035-B, 0102.3127 and 81 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.
Radiator buying guide
Why replace this part?
The radiator dissipates engine heat by transferring it from coolant to the air. A leaking or clogged radiator causes engine overheating, which can result in catastrophic engine damage including warped heads and blown gaskets.
Signs you need a replacement
- Coolant leaks or puddles under the car
- engine overheating
- discoloured or rusty coolant
- visible corrosion or damage to radiator fins
- steam from under the bonnet
When to replace
Typically lasts 8–10 years. Replace when leaks develop or internal blockages cause overheating. Flush cooling system every 5 years.
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 (92)
Show all 92 OE numbers
Radiator TOPRAN 502 277 — compatible car models
| Car models | BMW: 1 Convertible (E88), 1 Coupe (E82), 1 (E81), 1 (E87), 3 Convertible (E93), 3 Coupe (E92), 3 (E90), 3 Touring (E91), X1 (E84) |
|---|---|
| Engines | 118 d; 116 d; 320 d; 316 d; sDrive 16 d |
| Year of manufacture | 2003-2015 |
| Manufacturer article number (MPN) | 502 277 |
| OE part numbers | 1711 7 788 903, 1711 7 790 297 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 502277 Radiator. Core Depth [mm]: 32 mm. Core Length [mm]: 601 mm. Core Width [mm]: 340 mm
- 1x Radiator
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 4–8 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 Radiator compatible with my car?
This Radiator 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 TOPRAN Radiator have?
This TOPRAN Radiator has the following specifications: Core Length [mm]: 601 mm; Core Width [mm]: 340 mm; Core Depth [mm]: 32 mm. Check the full specifications table above for complete details.
What OE part numbers does this Radiator replace?
This Radiator replaces OE part numbers: 1711 7 788 903, 1711 7 790 297. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Radiator cost?
This TOPRAN Radiator is available for £71.99. Radiator 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 Radiator?
Signs of a failing radiator include visible coolant leaks (coloured fluid under the vehicle), engine overheating, coolant level dropping without explanation, or discolouration and corrosion on the radiator fins.
What tools do I need to replace a Radiator?
Tools needed: coolant drain pan, hose clamp pliers, flat-head screwdriver, 8-10mm socket, new coolant (correct type and mix ratio), funnel. Difficulty: Moderate DIY. Safety warning: Never open the radiator cap or coolant expansion tank on a hot engine -- pressurised coolant causes severe burns. Dispose of old antifreeze responsibly as it is toxic to animals.
Can I use this part as a replacement for OE 1711 7 788 903?
Yes, this TOPRAN Radiator is a direct replacement for OE part number 1711 7 788 903. 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.
