Purpose and Specifications

LIQUI MOLY 21687 Top Tec MTF 5100 is a premium 75W manual transmission fluid designed for smooth gear shifts and long-lasting protection in manual gearboxes. This 1-liter carton delivers reliable lubrication that reduces friction, cuts wear, and keeps your transmission running quietly even under heavy loads.

• Protects gears from wear during high-heat operation up to 150°C, preventing overheating and damage.
• Ensures easy cold starts down to -40°C for effortless shifting in winter.
• Extends transmission life with superior sealing against dirt and leaks.
• Compatible with BMW, MAN, ZF, and many vehicles from 1972-2025.

Practical benefits include quieter operation, smoother shifts, and fewer repairs, saving you money over time.

When to Use / Replace?

Use this fluid for manual transmissions needing GL4 specs, especially in high-performance or older vehicles. Replace every 60,000-100,000 km or 4-5 years, or sooner if you notice hard shifting, noise, or grinding. Shelf life is 5 years unopened.

Frequently Asked Questions

Q: Is LIQUI MOLY 21687 suitable for my BMW manual transmission?
A: Yes, it matches BMW spec 83 22 7 533 818 and provides smooth shifting with excellent wear protection.

Q: How often should I change this transmission oil?
A: Every 60,000-100,000 km or 4-5 years under normal driving; check your owner's manual for exact intervals.

Q: Can it handle extreme temperatures?
A: Absolutely, it flows easily at -40°C for cold starts and stays stable up to 150°C to prevent overheating.