I don’t understand the German logic: Oddly, I find my map cooling turning on and off on highway speeds on flattish roads with almost clockwork regularity….every 5 or so minutes the map cooling will come on and the temp will drop to 90 (!) degrees. Why? I’m not asking for extra schlitz at all…cruise control on at 73. The hidden menu doesn’t show the radiator outlet temp, but I know from plugging my foxwell in that it soars to 160 to 170 or so during the time my map cools is active and the engine outlet temp drops to 90 degrees, which doesn’t seem like a lot of spread between motor and radiator outlet temps.

I’ve got some unfortunate experience with overheating and have come around to the belief that even 10 degrees cooler would be better. My oil cooler mod keeps the oil at 93 degrees and I think that’s what saved my motor when it overheated.

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee