Haldex Filter Service Kit Gen 1 Audi VW SEAT Skoda 02D525558A S-TEC

S-TEC Haldex Generation 1 Filter Service Kit — Audi, VW, SEAT, Skoda — 02D525558A / DS120359

The AWD filter and Haldex oil are an often overlooked service requirement for four-wheel-drive systems. Neglecting this service causes failure of the pump and in some cases the complete Haldex unit. The filter captures particles including metal fragments from the Haldex system and prevents them entering delicate components like the pump.

Parts Included

• Generation 1 Haldex filter
• Filter cap
• Rubber seal

Part Numbers

BorgWarner: DS120359
VAG: 02D525558 / 02D525558A / 2D525558 / 2D525558A

Fitment

Vehicle Compatibility

• Audi A3 Quattro (1997–2003) / TT Quattro (1999–2005)
• SEAT Alhambra 4x4 (2001–2010) / Leon 4Drive (2000–2006) / Toledo (1999–2004)
• Skoda Octavia 4x4 (1999–2005)
• VW Beetle 4Motion (1999–2001) / Bora 4Motion (1999–2005) / Golf 4Motion (1998–2006) / Sharan 4Motion (2001–2010)

This listing is the S-TEC-supplied unit — a brand new genuine part. We also stock the BorgWarner version under ET2261-BW.

Frequently Asked Questions

How often should the Haldex filter be replaced?

We recommend a Haldex oil and filter change every 20,000 miles. On vehicles with an unknown service history, change the filter immediately to protect the pump.

Do I need to replace the oil at the same time?

Yes. The oil and filter should always be changed together. Old Haldex oil carries metal particles that will contaminate a new filter rapidly if not drained and replaced.

What is the difference between DS120359 and the pump kit DS108295?

DS120359 is the filter service kit (this product); DS108295 (ET2267) is the pump itself. The filter service is a routine maintenance item; the pump is replaced when it fails.

Does 02D525558 and 02D525558A refer to the same part?

These are successive VAG part numbers that supersede each other. DS120359 covers the complete application for Generation 1 filter service.

Can I carry out the filter service at home?

The filter is accessible from underneath the vehicle without removing the Haldex unit. With the correct Haldex oil, a drain pan, and this kit, the service can be performed with standard workshop tools.

Why Choose Eco Torque?

As specialists in gearbox rebuilds and repairs, Eco Torque takes pride in offering genuine gearbox parts, high-quality aftermarket alternatives and competitive pricing.

Need Help Finding the Right Part?

If you are unsure whether this part is compatible with your vehicle, send us your UK registration number or VIN and we will help you find the correct part.

Reference Number: ET2261