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Details
| Specification | Value |
|---|---|
| Brand | OPTIMAL |
| MPN | 0-n2149 |
| Width [mm] | 29 mm |
| Thread Size | M10 |
| Outer Diameter [mm] | 53 mm |
OE/OEM numbers (4)
Search by this OE number to find compatible parts
- SUZUKI—12781-79J50
- SUZUKI—12781-79J51
- FIAT—55187100
- FIAT—71771498
Where this part fits
Original-fit position for OE 1278179J51. The red ring marks where this part installs on the vehicle.
About this product
The OPTIMAL Deflection Pulley Guide Pulley Timing Belt (0-N2149) 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: Width [mm]: 29 mm, Thread Size: M10 Thread, Outer Diameter [mm]: 53 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit ALFA ROMEO, CADILLAC, CHEVROLET, CHRYSLER and 8 other makes 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: 03.80750, 12781-79J50, 12781-79J51, 13SZ016 and 20 more. Matching these numbers confirms a like-for-like replacement with no loss of function. OPTIMAL 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.
About OPTIMAL
OPTIMAL, founded in Germany, is a well-regarded aftermarket brand specialising in steering, suspension, and wheel bearing components. OPTIMAL produces ball joints, tie rod ends, control arm bushings, wheel bearings, and stabiliser links for European, Asian, and American vehicle applications. Manufactured to stringent quality standards with comprehensive testing protocols, OPTIMAL parts deliver OE-matching fit and performance. Known for excellent value and wide vehicle coverage, OPTIMAL is a popular choice among professional workshops across Europe.
Suitable cars
Equivalent products (20)
Deflection Pulley Guide Pulley Timing Belt OPTIMAL 0-N2149 — compatible car models
| Car models | ALFA ROMEO: 147 (937), 156 (932), 156 Sportwagon (932), 159 (939), 159 Sportwagon (939), 4C (960), 4C SPIDER (960), BRERA (939), GIULIETTA (940), GT (937) (+2 more); CADILLAC: BLS, BLS Wagon; CHEVROLET: MALIBU (V300); CHRYSLER: DELTA; FIAT: 500L (351, 352), 500X (334), BRAVO II (198), CROMA (194), DOBLO Box Body/MPV (223), DOBLO Bus (263), DOBLO Cargo (263), DOBLO MPV (119, 223), DOBLO Platform/Chassis (263), DUCATO Bus (250) (+4 more) |
|---|---|
| Engines | 1.9 JTD 16V (937.AXG1B, 937.BXG1B); 1.9 JTD 16V (932AXE00); 1.9 JTD 16V (932BXE00); 1.8 TBi (939.AXN1B); 1.8 TBi (939BXN1B); 1.8 (960.CXB1A); 1.8 (960.DXB1A, 960CXB1A); 1.8 TBi (939DXN1B); 1.6 JTDM (940FXD1A); 1.9 JTD (937CXN1B); 1.6 JTDM (955AXC1B); 1.9 D; 2.0 D; 1.6 D Multijet; 1.6 D Multijet (199LYD1B) (+7 more) |
| Year of manufacture | 1997-2023 |
| Manufacturer article number (MPN) | 0-N2149 |
| OE part numbers | 12781-79J50, 12781-79J51, 55187100, 71771498 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
OPTIMAL 0-n2149 . Outer Diameter [mm]: 53 mm. Thread Size: M10. Width [mm]: 29 mm
- 1x Deflection Pulley Guide Pulley Timing Belt
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 Deflection Pulley Guide Pulley Timing Belt compatible with my car?
This Deflection Pulley Guide Pulley Timing Belt fits ALFA ROMEO, CADILLAC, CHEVROLET, CHRYSLER, FIAT and 7 more 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 OPTIMAL Deflection Pulley Guide Pulley Timing Belt have?
This OPTIMAL Deflection Pulley Guide Pulley Timing Belt has the following specifications: Width [mm]: 29 mm; Thread Size: M10; Outer Diameter [mm]: 53 mm. Check the full specifications table above for complete details.
What OE part numbers does this Deflection Pulley Guide Pulley Timing Belt replace?
This Deflection Pulley Guide Pulley Timing Belt replaces OE part numbers: 12781-79J50, 12781-79J51, 55187100, 71771498. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Deflection Pulley Guide Pulley Timing Belt cost?
This OPTIMAL Deflection Pulley Guide Pulley Timing Belt is available for £15.99. Deflection Pulley Guide Pulley Timing Belt prices vary depending on brand, specifications, and vehicle compatibility. OPTIMAL parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Deflection Pulley Guide Pulley Timing Belt?
Regular inspection of your Deflection Pulley Guide Pulley Timing Belt 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 Deflection Pulley Guide Pulley Timing Belt?
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 Deflection Pulley Guide Pulley Timing Belt fitted by a professional mechanic.
Can I use this part as a replacement for OE 12781-79J50?
Yes, this OPTIMAL Deflection Pulley Guide Pulley Timing Belt is a direct replacement for OE part number 12781-79J50. 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.
