Brake fluid BMW X5 G05 (2018–2025) — DOT4 specification
Brake fluid for BMW X5 G05 (2018–2025) — required specification, boiling points, system volume, and approved brands.
Specifiche tecniche
| Parameter | Value |
|---|---|
| Marca / Modello | BMW X5 G05 |
| Anni di produzione | 2018–2025 |
| Specifica del liquido | DOT4 |
| Punto di ebollizione secco | 230°C |
| Punto di ebollizione umido | 155°C |
| Volume del sistema | 800 ml |
| Intervallo di sostituzione | 30 000 km / anni |
Marchi approvati
BMW Genuine DOT4, ATE SL.6, Motul DOT4 LV
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). BMW requires DOT4 with a dry boiling point of at least 230°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)
Domande frequenti
What brake fluid does BMW X5 G05 use?
DOT4 specification. Punto di ebollizione secco: 230°C. Volume del sistema: 800 ml. Marchi approvati: BMW Genuine DOT4, ATE SL.6, Motul DOT4 LV.
How often should I change brake fluid in BMW X5 G05?
Every 30 000 km or every anni — 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: DOT4.
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