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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- BMW—1131 2 249 851
- BMW—1131 8 506 869
Where this part fits
Original-fit position for OE 11312249851. The red ring marks where this part installs on the vehicle.
About this product
The TOPRAN Timing Chain (502 978) 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: Driven Units: 29, Driven Units: 45, Number of chain links: 74, Chain Type: Rubber, Chain Type: Steel. 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: 001-10-19749, 03.89043K, 03.89051K, 03.89109K and 161 more. Matching these numbers confirms a like-for-like replacement with no loss of function. TOPRAN is a recognised supplier of automotive engine timing 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Timing Chain buying guide
Why replace this part?
Timing chains serve the same function as timing belts but are designed to last the engine's lifetime. However, chain stretch from oil starvation, worn tensioners, or failed guides can cause timing deviation, valve contact, and severe engine damage.
Signs you need a replacement
- Rattling or clattering on cold start that may disappear when warm
- check engine light with camshaft-crankshaft correlation codes
- rough running on startup
- check engine light for variable valve timing errors
When to replace
No service interval — designed for engine life. Cold-start rattle is a warning sign requiring immediate action. Regular oil changes with the correct grade are the best prevention.
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 (174)
Show all 174 OE numbers
Timing Chain TOPRAN 502 978 — compatible car models
| Car models | BMW: 1 (E87), 3 Compact (E46), 3 Convertible (E46), 3 Convertible (E93), 3 Coupe (E46), 3 Coupe (E92), 3 (E46), 3 (E90), 3 Touring (E46), 3 Touring (E91) (+9 more) |
|---|---|
| Engines | 118 d; 318 td; 320 Cd; 325 d; 318 d; 520 d; 635 d; 730 d; 2.0 d; 3.0 d; xDrive 30 d |
| Year of manufacture | 1997-2015 |
| Manufacturer article number (MPN) | 502 978 |
| OE part numbers | 1131 2 249 851, 1131 8 506 869 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 502978 . Chain Type: 1. Chain Type: 5. Driven Units: 29. Driven Units: 45. Number of chain links: 74
- 1x Timing Chain
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- 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 Timing Chain compatible with my car?
This Timing Chain 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 Timing Chain have?
This TOPRAN Timing Chain has the following specifications: Driven Units: 29; Driven Units: 45; Number of chain links: 74; Chain Type: 5; Chain Type: 1. Check the full specifications table above for complete details.
What OE part numbers does this Timing Chain replace?
This Timing Chain replaces OE part numbers: 1131 2 249 851, 1131 8 506 869. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Timing Chain cost?
This TOPRAN Timing Chain is available for £16.99. Timing Chain 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 Timing Chain?
Timing chains are designed to last the engine's lifetime but can wear prematurely. Signs include a rattling or slapping noise from the engine on cold start, the check engine light with camshaft position error codes, or the engine running rough after extended idling.
What tools do I need to replace a Timing Chain?
Tools needed: engine timing lock set (vehicle-specific), socket set, torque wrench, camshaft holding tool, chain tensioner reset tool. Difficulty: Professional required. Safety warning: Timing chain work requires engine timing to be precisely locked before disassembly. Any error will cause major internal engine damage on first start. This job is not suitable for DIY without professional training.
Can I use this part as a replacement for OE 1131 2 249 851?
Yes, this TOPRAN Timing Chain is a direct replacement for OE part number 1131 2 249 851. 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.
