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Details
| Specification | Value |
|---|---|
| Brand | NTY |
| MPN | erd-au-004 |
| Length [mm] | 106 mm |
| Width [mm] | 58 mm |
| Fabrication Number | ERD-AU-004 |
OE numbers (2)
Search by this OE number to find compatible parts
- AUDI / VAG—4F0 820 521
- AUDI / VAG—4F0 820 521 A
Where this part fits
Original-fit position for OE 4F0820521A. The red ring marks where this part installs on the vehicle.
About this product
The NTY Control Unit Heating Ventilation (ERD-AU-004) 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: Length [mm]: 106 mm, Width [mm]: 58 mm, Fabrication Number: ERD-AU-004. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit AUDI 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: 026081008LGK, 048118N, 07.59.068, 10.6034 and 45 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 with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (53)
Show all 53 OE numbers
Control Unit Heating Ventilation NTY ERD-AU-004 — compatible car models
| Car models | AUDI: A6 Allroad C6 (4FH), A6 C6 (4F2), A6 C6 Avant (4F5), R8 (422, 423), R8 Spyder (427, 429) |
|---|---|
| Engines | 2.7 TDI quattro; 2.0 TDI; 4.2 FSI quattro |
| Year of manufacture | 2004-2016 |
| Manufacturer article number (MPN) | ERD-AU-004 |
| OE part numbers | 4F0 820 521, 4F0 820 521 A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
NTY erd-au-004 . Fabrication Number: ERD-AU-004. Length [mm]: 106 mm. Width [mm]: 58 mm
- 1x Control Unit Heating Ventilation
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 Control Unit Heating Ventilation compatible with my car?
This Control Unit Heating Ventilation 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 Control Unit Heating Ventilation have?
This NTY Control Unit Heating Ventilation has the following specifications: Length [mm]: 106 mm; Width [mm]: 58 mm; Fabrication Number: ERD-AU-004. Check the full specifications table above for complete details.
What OE part numbers does this Control Unit Heating Ventilation replace?
This Control Unit Heating Ventilation replaces OE part numbers: 4F0 820 521, 4F0 820 521 A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Control Unit Heating Ventilation cost?
This NTY Control Unit Heating Ventilation is available for £44.99. Control Unit Heating Ventilation 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 Control Unit Heating Ventilation?
Regular inspection of your Control Unit Heating Ventilation 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 Control Unit Heating Ventilation?
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 Control Unit Heating Ventilation fitted by a professional mechanic.
Can I use this part as a replacement for OE 4F0 820 521?
Yes, this NTY Control Unit Heating Ventilation is a direct replacement for OE part number 4F0 820 521. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the NTY ERD-AU-004 the same as the NTY CSW-HY-500?
No, while both are Control Unit Heating Ventilation parts, they are different products. The NTY ERD-AU-004 has Length [mm]: 106 mm, Width [mm]: 58 mm, Fabrication Number: ERD-AU-004. The NTY CSW-HY-500 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
