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Brake Fluid Specs

Mod Details
PremiumNo Difficulty Mod ID1766 Creditevilution For450 Fortwo451 ED451 Fortwo452 Roadster453 EQ453 Fortwo/Forfour454 Forfour Link Copy to Clipboard

This is going to be a short and easy page of information since, unlike oil and other fluids, all smarts use exactly the same brake fluid.

Recommended Brake Fluid

Smart recommend MB 331.0 brake fluid which is one of the following part numbers:

000 989 08 07
000 989 56 05

If you search MB331.0 on eBay, you’ll find a range of options.

However, any DOT 4 will work perfectly in all smarts but do make sure it’s DOT4.

DOT3, DOT4, DOT5, DOT5.1

DOT4 brake fluid and brake systems are compatible with DOT3, DOT4 and DOT5.1

DO NOT USE DOT5 as it’s silicone based and not compatible with the existing fluid.

DOT3 can be used but not recommended as it has a lower boiling point compared to DOT4

DOT5.1 has a higher boiling point and is compatible with your car’s existing fluid but to be honest, it’s not really worth the time, money and effort.

Why Not?

Smarts aren’t quick or heavy so they don’t need high performance brake fluid.

Adding a few glugs of DOT5.1 into your brake system isn’t going to positively affect anything. Unless you are doing a full fluid change, it’s not worth it.

Also, DOT5.1 is more expensive.