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Details
| Specification | Value |
|---|---|
| Brand | Borsehung |
| MPN | b18525 |
| Category | controller, passenger compartment fan |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- VAG—4F0820521
- VAG—4F0820521A
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 Borsehung controller, passenger compartment fan (B18525) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. 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: 132539, 39836, 4F0820521, 4F0820521A and 1 more. Matching these numbers confirms a like-for-like replacement with no loss of function. Borsehung 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 (3)
controller, passenger compartment fan Borsehung B18525 — compatible car models
| Car models | AUDI: A6 Allroad C6 (4FH), A6 C6 (4F2), A6 C6 Avant (4F5), A6 C7 (4G2, 4GC), R8 (422, 423), R8 Spyder (427, 429) |
|---|---|
| Engines | 2.7 TDI quattro; 2.0 TDI; 3.0 TFSI quattro; 4.2 FSI quattro |
| Year of manufacture | 2004-2019 |
| Manufacturer article number (MPN) | B18525 |
| OE part numbers | 4F0820521, 4F0820521A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
Borsehung b18525 controller, passenger compartment fan
- 1x controller, passenger compartment fan
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 controller, passenger compartment fan compatible with my car?
This controller, passenger compartment fan 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 Borsehung controller, passenger compartment fan have?
The package includes the controller, passenger compartment fan as described in the specifications above. Check the "What's included" section for a full list of components. If mounting hardware or accessories are required, they will be listed separately.
What OE part numbers does this controller, passenger compartment fan replace?
This controller, passenger compartment fan replaces OE part numbers: 4F0820521, 4F0820521A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a controller, passenger compartment fan cost?
This Borsehung controller, passenger compartment fan is available for £91.99. Controller, passenger compartment fan prices vary depending on brand, specifications, and vehicle compatibility. Borsehung parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my controller, passenger compartment fan?
Regular inspection of your controller, passenger compartment fan 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 controller, passenger compartment fan?
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 controller, passenger compartment fan fitted by a professional mechanic.
Can I use this part as a replacement for OE 4F0820521?
Yes, this Borsehung controller, passenger compartment fan is a direct replacement for OE part number 4F0820521. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
