3 SERIES SALOON E90. 5 SERIES SALOON E60. 5 SERIES SALOON E39. 3 SERIES SALOON E46. EXTERNAL AIR TEMPERATURE SENSOR. BMW 1 SERIES E81 3 DOOR & E87 5 DOOR HATCHBACK. The first sign you may have a problem with your external temperature sensor is if you have a really low reading.
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