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Details
| Specification | Value |
|---|---|
| Brand | OPTIMAL |
| MPN | 0-n939 |
| Width [mm] | 21 mm |
| Height [mm] | 29.49 mm |
| Outer Diameter [mm] | 66 mm |
OE numbers (1)
Search by this OE number to find compatible parts
- AUDI—054 109 479
Where this part fits
Original-fit position for OE 054109479.
About this product
OPTIMAL Tensioner Pulley Timing Belt (0-N939) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Width [mm]: 21 mm, Height [mm]: 29, 49 mm, Outer Diameter [mm]: 66 mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with AUDI 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: 054 109 479, 07.19.113, 14-0076, 23857 and 22 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 with tracked delivery and a 14-day money-back guarantee with 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 (26)
Show all 26 OE numbers
Tensioner Pulley Timing Belt OPTIMAL 0-N939 — compatible car models
| Car models | AUDI: 100 C3 Saloon (443, 444), 100 C4 Avant (4A5), 100 C4 Saloon (4A2), 80 B4 Avant (8C5), 80 B4 Saloon (8C2), A6 C4 (4A2), A6 C4 Avant (4A5), CABRIOLET B3 (8G7), COUPE B3 (89, 8B3) |
|---|---|
| Engines | 2.3 E; 2.3 |
| Year of manufacture | 1982-2000 |
| Manufacturer article number (MPN) | 0-N939 |
| OE part numbers | 054 109 479 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
OPTIMAL 0-n939 . Height [mm]: 29,49 mm. Outer Diameter [mm]: 66 mm. Width [mm]: 21 mm
- 1x Tensioner Pulley Timing Belt
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 Tensioner Pulley Timing Belt compatible with my car?
This Tensioner Pulley Timing Belt fits AUDI 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 Tensioner Pulley Timing Belt have?
This OPTIMAL Tensioner Pulley Timing Belt has the following specifications: Width [mm]: 21 mm; Height [mm]: 29,49 mm; Outer Diameter [mm]: 66 mm. Check the full specifications table above for complete details.
What OE part numbers does this Tensioner Pulley Timing Belt replace?
This Tensioner Pulley Timing Belt replaces OE part numbers: 054 109 479. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Tensioner Pulley Timing Belt cost?
This OPTIMAL Tensioner Pulley Timing Belt is available for £38.99. Tensioner 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 Tensioner Pulley Timing Belt?
Regular inspection of your Tensioner 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 Tensioner 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 Tensioner Pulley Timing Belt fitted by a professional mechanic.
Can I use this part as a replacement for OE 054 109 479?
Yes, this OPTIMAL Tensioner Pulley Timing Belt is a direct replacement for OE part number 054 109 479. 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.
