P1622 Thermostat MAP Sensor/ Help - Bimmerfest - BMW Forums

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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 08-29-2011, 04:37 PM
flatscreenguru flatscreenguru is offline
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Join Date: Aug 2011
Posts: 16
Mein Auto: BMW 528i
P1622 Thermostat MAP Sensor/ Help

1999 528i

Does anyone know of a shop or mechanic that will do the thermostat for less than $400.00? If not, it is what it is, but I would like to know why the car never overheats, and doesn't run hot?? The gauge goes up to just under the middle and stays there through the entire drive.
Is there something I'm missing here? Do I need to have the thermostat changed? I read that as a fail safe the BMW computer controlled thermostats still work mechanically by heat and cold as a fail safe. I reset the code and after the next cold start the check engine light will come on and give me that code on the reader.

Help? Info? Thx in advance all...
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