Audi and VW Brake and Steering Fluids: Check the Correct System
Brake fluid and power-steering fluid are separate purchases. Identify the system and its required fluid before comparing products.
Brake fluid and power-steering fluid are separate purchases. Identify the system and its required fluid before comparing products.
Start with the system
Check whether the job concerns brakes or a hydraulic steering system. Do not transfer a brake-fluid recommendation to the steering reservoir, or a steering-fluid reference to the brakes. For a steering-fluid purchase, establish that the vehicle has a hydraulic system and obtain its specified fluid reference before choosing a product.
Brake-fluid selection
For a brake system requiring the matching low-viscosity DOT 4 specification, ATE SL.6 is a product to compare. The manufacturer distinguishes SL.6 from Typ 200 and Super DOT 5.1. ECS lists selected Audi and Volkswagen applications, but the vehicle selector and the required specification still need to agree.
Tips and tricks
The ECS and Turner offers below are for a one-liter SL.6 container. They share the manufacturer reference03.9901-6402.2 despite different merchant SKU labels. Confirm vehicle configuration and the required specification on the retailer page. Buy the quantity needed for the planned operation; one bottle is a package description, not a universal flush quantity.
Compare Pentosin CHF 11S steering-fluid offers
When the vehicle’s hydraulic system specifically requires CHF 11S, compare the Pentosin-branded one-liter bottle, CRP part 1405116. ECS and Turner both list this exact formula and package. Confirm the required fluid and vehicle configuration with the retailer before ordering; this is a separate purchase from the SL.6 brake fluid above.
Shared OEM references do not make differently branded bottles or package sizes identical products. These offers supply one liter, not a full-system service quantity. Check the planned operation before choosing the bottle count. EWP provides comparisons and referral links; the merchant handles the transaction and final application confirmation.
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Written by
Lee Shahin
Founder, European Wholesale Parts
Lee Shahin founded European Wholesale Parts in Pleasanton, California, after 18 years in the Mercedes-Benz and BMW parts trade. He came to the parts side from the shop floor: he opened a European repair shop in Northern California in the early 1990s, specialising in Mercedes-Benz and BMW, and grew it with his wife Laurie into a parts and delivery operation serving body shops and independent repair facilities across the region. Nearly two decades at the parts counter taught him where the expensive mistakes happen, and most of them are fluids: the wrong coolant in an aluminium block, an oil without the sheet approval the engine was designed for, a transmission topped with the wrong ATF. That is what he writes about here. Every article names the manufacturer specification by its exact designation, explains what the wrong fluid does mechanically, lists products that carry the approval, and gives the capacity and interval for the models and years the specification covers. When a reader needs a part sourced, the quote desk at European Wholesale Parts is where Lee and Laurie still answer the phone.