[APMX101]

Hi all. My 2023 M550 just gave me a low coolant alert. Checked the manual for location of coolant reservoir and it shows a completely different picture of the v8 engine bay. I have included a picture of my engine bay. Could someone show me which is the coolant reservoir where i fill it up with coolant please.
Thanks in advance.

[clegg]

Looking at your MPERFORMANCE engine cover, drivers side toward the back. Knob looking cap with yellow markings. Unscrew it and add coolant. Only remove this cap when the engine is cold. Just fill to where inside is has an upper marker.

You will want to take a look at the coolant reservoir for leaks. It should not be low unless it's leaking.

Better off to have the dealer check and refill since you should still be under warranty.

[APMX101]

Thanks Clegg. Much appreciated.

[jcy]

there's a 2nd coolant reservoir for the air conditioning, you should probably check that also while you're at it

[n-hampt4]

Originally Posted by jcy

there's a 2nd coolant reservoir for the air conditioning, you should probably check that also while you're at it

There is a second reservoir, not for air conditioning. The low temp circuit. It is for cooling the turbo/charge air system. It is the cap directly in front of the engine. This won't commonly go low (providing no leaks) as it does not get as hot as the high temp circuit, so almost no natural loss of coolant.

[maDjzo]

Originally Posted by APMX101

Hi all. My 2023 M550 just gave me a low coolant alert. Checked the manual for location of coolant reservoir and it shows a completely different picture of the v8 engine bay. I have included a picture of my engine bay. Could someone show me which is the coolant reservoir where i fill it up with coolant please.
Thanks in advance.

That's funny, my Pre LCI M550i shows the engine bay of a 540 in my Manual. Your LCI shows a picture of a Pre LCI M550i. Cool.