Just how important is it that the BMW coolant be used when flushing the coolant system? Except for the color, What's the difference between BMW & Prestone? They're both a 50/50 mixture of water & coolant...right??
without the phosphates, silicates, borates should be acceptable. The cost of the BMW coolant is roughly double the cost of the Prestone linked herein (with discounts). However, considering the frequency of coolant replacement, not an issue.
However, if you do a thorough flush (at least 4 to 5 times with distilled water) of whatever you have in there now, and then refill with this one, it should be OK.
A forum community dedicated to BMW owners and enthusiasts. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Bringing the BMW community together.