Brake fluid Audi Q5 FY (2016–2023) — DOT 4 Plus specification
Brake fluid for Audi Q5 FY (2016–2023) — required specification, boiling points, system volume, and approved brands.
Technical Specifications
| Parameter | Value |
|---|---|
| Make / Model | Audi Q5 FY |
| Production Years | 2016–2023 |
| Fluid specification | DOT 4 Plus |
| Dry boiling point | 260°C |
| Wet boiling point | 165°C |
| System volume | 600 ml |
| Change interval | 60 000 km / 2 years |
Approved brands
ATE SL DOT 4 Plus / Castrol DOT 4 LLT / Pentosin Super DOT 4 Plus
Why Brake Fluid Must Be Changed Regularly
Brake fluid is hygroscopic — it absorbs moisture from the air over time. As moisture content increases, the boiling point drops significantly. When the fluid boils under heavy braking, vapour bubbles form and the pedal goes to the floor (vapour lock). Audi requires DOT 4 Plus with a dry boiling point of at least 260°C.
How to Check Brake Fluid Condition
- Test strips — dip a strip in the reservoir; colour indicates moisture content
- Electronic tester — measures boiling point directly (most accurate)
- Visual inspection — dark/brown fluid indicates it must be replaced (fresh fluid is amber/clear)
FAQ
What brake fluid does Audi Q5 FY use?
DOT 4 Plus specification. Dry boiling point: 260°C. System volume: 600 ml. Approved brands: ATE SL DOT 4 Plus / Castrol DOT 4 LLT / Pentosin Super DOT 4 Plus.
How often should I change brake fluid in Audi Q5 FY?
Every 60 000 km or every 2 years — whichever comes first. This is a safety-critical service.
Can I mix different DOT grades?
You can mix DOT 3 and DOT 4 in an emergency, but never mix DOT 5 (silicone-based) with DOT 3/4 (glycol-based). Always use the correct specification: DOT 4 Plus.
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