Hey guys! So my friend got a low coolant light on her 2021 BMW 330i xdrive. We’re planning on doing it ourselves, however I have a few questions.
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Is it okay to mix coolants? We’re going to use PEAK pre-diluted coolant and I’m pretty sure my friend car has the original BMW coolant since she has gotten all her service done there.
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Do we need to drain the old coolant?
Thanks everyone!
No. Do NOT mix coolant types. Different coolant types can gel or cancel out the anti-corrosion additives in the other coolant