I've done it on my E39's and I'm very happy with Spal fan and Spal replay. I'll probably do the same with X5 sometime in the future.

Electric fan conversion almost completed

Electric fan conversion completed on 97 BMW 528i

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2010 BMW M6 * Black Saphire Metallic * Full Black Merino Leather
2019 BMW X3 M40i * Alpine White * Mocha Leather