Discussion in 'E39 (1997-2003)' started by csxander, Sep 6, 2009.
What brand of coolant do you use on a 2003 540i and what mixture? The manual doesn't address this.
Just use BMW's coolant. Others will say Mercedes-Benz, Saab, or Zerex G-05 is the same stuff.
Usually 50/50 mix with distilled or demineralized water satisfies most of us, but here's a chart from Peak with info:
Ja, I would stick with BMW OEM coolant and a gallon of distilled water, mixed 50 / 50.
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