Purpose and Specifications

ZF S671.090.255 is the genuine ZF LifeguardFluid 6 automatic transmission oil, specially formulated for ZF 6HP transmissions in BMW, Continental and other premium vehicles. This 1-liter bottle delivers smooth shifting, protects components from wear, and maintains performance in extreme temperatures from -40°C to over 200°C.

It flows easily in freezing cold for quick starts and stays thick during hot highway drives, reducing fuel use and extending transmission life up to 150,000 km or 8 years under normal conditions.

When to Use / Replace?

• Use in ZF 6HP19, 6HP21, 6HP26, 6HP28, and 6HP32 transmissions (avoid specific Audi variants like 6HP19A that need Lifeguard 8).
• Replace every 60,000-100,000 km or 4-5 years for heavy towing or city driving; check fluid level and condition during routine service.
• Shelf life is 5 years unopened when stored cool and dry.

Frequently Asked Questions

Is this the right oil for my BMW with 6HP transmission?
Yes, it's the OEM spec for most BMW 3 Series, 5 Series, and others with ZF 6HP units from 2004-2018.

Can I mix it with other ATF?
No, use only pure Lifeguard 6 to avoid shifting issues or damage.

How much for a full flush?
Typically 7-9 liters for ZF 6HP; always follow your vehicle's service manual.