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Details
| Specification | Value |
|---|---|
| Brand | NTY |
| MPN | esa-au-004 |
| Width [mm] | 45.3 mm |
| Fabrication Number | ESA-AU-004 |
| Distance to first groove [mm] | 21.1 mm |
OE/OEM numbers (5)
Search by this OE number to find compatible parts
- AUDI / SEAT / SKODA / VAG / VW—06B 903 016 AA
- AUDI / SEAT / SKODA / VAG / VW—06B 903 016 S
- AUDI / SEAT / SKODA / VAG / VW—06B 903 019
- AUDI / SEAT / SKODA / VAG / VW—06B 903 019 A
- AUDI / SEAT / SKODA / VAG / VW—06B 903 119 A
Where this part fits
Original-fit position for OE 06B903016AA. The red ring marks where this part installs on the vehicle.
About this product
When alternator freewheel clutch performance matters, the NTY ESA-AU-004 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Width [mm]: 45, Cast Iron mm, Supplementary Article/Info 2: 664, Number of grooves: Plastic, Fabrication Number: ESA-AU-004, Distance to first groove [mm]: 21, Steel mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. 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: 06B 903 016 AA, 06B903016AA, 06B 903 016 S, 06B903016S and 46 more. Matching these numbers confirms a like-for-like replacement with no loss of function. NTY 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Suitable cars
Equivalent products (40)
Show all 40 OE numbers
Alternator Freewheel Clutch NTY ESA-AU-004 — compatible car models
| Car models | AUDI: A4 B5 (8D2), A4 B5 Avant (8D5), A4 B6 (8E2), A4 B6 Avant (8E5), A4 B6 Convertible (8H7), A4 B7 (8EC), A4 B7 Avant (8ED), A6 C5 (4B2, 4B4), A6 C5 Avant (4B5, 4B6) |
|---|---|
| Engines | 1.6; 1.8 T; 2.0 |
| Year of manufacture | 1994-2009 |
| Manufacturer article number (MPN) | ESA-AU-004 |
| OE part numbers | 06B 903 016 AA, 06B 903 016 S, 06B 903 019, 06B 903 019 A, 06B 903 119 A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
NTY esa-au-004 . Distance to first groove [mm]: 21,1 mm. Fabrication Number: ESA-AU-004. Number of grooves: 6. Supplementary Article/Info 2: 664. Width [mm]: 45,3 mm
- 1x Alternator Freewheel Clutch
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 Alternator Freewheel Clutch compatible with my car?
This Alternator Freewheel Clutch 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 NTY Alternator Freewheel Clutch have?
This NTY Alternator Freewheel Clutch has the following specifications: Width [mm]: 45,3 mm; Supplementary Article/Info 2: 664; Number of grooves: 6; Fabrication Number: ESA-AU-004; Distance to first groove [mm]: 21,1 mm. Check the full specifications table above for complete details.
What OE part numbers does this Alternator Freewheel Clutch replace?
This Alternator Freewheel Clutch replaces OE part numbers: 06B 903 016 AA, 06B 903 016 S, 06B 903 019, 06B 903 019 A, 06B 903 119 A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Alternator Freewheel Clutch cost?
This NTY Alternator Freewheel Clutch is available for £41.99. Alternator Freewheel Clutch prices vary depending on brand, specifications, and vehicle compatibility. NTY parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Alternator Freewheel Clutch?
Regular inspection of your Alternator Freewheel Clutch 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 Alternator Freewheel Clutch?
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 Alternator Freewheel Clutch fitted by a professional mechanic.
Can I use this part as a replacement for OE 06B 903 016 AA?
Yes, this NTY Alternator Freewheel Clutch is a direct replacement for OE part number 06B 903 016 AA. 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.
