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July 1, 2014 Service bulletin

Retrofit of the Engine Coolant Temperature Sensor

MINI technical service bulletin M170812 for 2011-2015 MINI Cooper, 2011-2015 MINI Cooper S and 2011-2012 MINI Cooper S Convertible and others.

Bulletin number
M170812
Component
Engine and engine cooling
Summary
Service Action: Retrofit of the Engine Coolant Temperature Sensor. Internal corrosion could form in the engine coolant temperature sensor which is integrated into the thermostat housing (not replaceable). This corrosion leads to internal bridging of the contacts, which can cause an inaccurate engine temperature reading. This false reading could lead to difficulty in the engine starting or a "Service Engine Soon" lamp being illuminated.

Owners of these vehicles have filed 115 complaints in the engine category.

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