Checking Coolant Level

WARNING! Do not add coolant to the cooling system when the engine is hot since escaping coolant can cause burns.

CAUTION: To avoid the possibility of damage later on, do not use anything other than factory-approved, nitrite and amino-free extended-duty antifreeze with corrosion inhibitor which can be used with aluminum radiator cores. Your BMW center is familiar with the official specifications.

WARNING! Antifreeze and anti-corrosion agents are hazardous to health. Store them in their original containers. Keep the containers tightly closed and out of reach of children.

WARNING! Extended-duty antifreeze with corrosion inhibitor contains the flammable substance ethylene glycol. For this reason, do not spill extended-duty antifreeze with corrosion inhibitor on hot engine components. If you do, it could be ignited and cause serious burns.

CAUTION: Comply with the applicable environmental Laws regulating the disposal of extended-duty antifreeze with corrosion inhibitor.

CHECKING COOLANT LEVEL:

Z3 Roadster, Z3 Coupe:

M Roadster, M Coupe:

Z3 Roadster, Z3 Coupe:

The correct coolant level when the engine is cold (approx. 68°F/20°C):

Unscrew the cap from the expansion tank.

The coolant level is correct when the end of the red float is aligned with the upper edge of the filler opening (refer to the arrow in the illustration or the schematic diagram next to the cap).

M Roadster, M Coupe:

The correct coolant level when the engine is cold (approx. 68°F/20°C):

Up to the KALT/COLD mark (arrow) of the transparent expansion tank.

TO ADD COOLANT:

WARNING! Wait until the engine cools before removing the cap from the expansion tank. The needle of the coolant gauge in the instrument cluster must be located in the blue field; otherwise, there is a danger of scalding.

1 Turn the cap slightly counterclockwise in order to allow accumulated pressure to escape. Then open.

2 If the coolant is low, slowly add coolant until the correct level is reached - do not overfill.

The coolant is a mixture of water and extended-duty antifreeze with corrosion inhibitor. Always maintain the prescribed all-season 50:50 mixture ratio for year-round protection against internal corrosion. No other additives are required.

Replace the coolant regularly. Refer to the Service and Warranty Information Booklet (US models) or the Warranty and Service Guide (Canadian models).