Cooling System - Low Coolant Light ON

SI B17 01 03
Cooling Systems

September 2003
Service Engineering

SUBJECT
Coolant Level Warning Light On

MODEL
X5 with 4.4 and 4.6 liter engine from start of production to 4/20/03

SITUATION
Certain X5 vehicles equipped with the 4.4 or 4.6 liter M62TU engine may have the coolant warning light illuminated, even when the actual coolant level is sufficient. Troubleshooting leads to replacement of the coolant level sensor. Within a short time, the vehicle may return to the workshop with the same complaint.

CAUSE





Insufficient clearance between underside of the coolant expansion tank (2) and the support bracket (1) as indicated by the arrow in illustration. Contact between the bracket and the coolant level sensor, located on the underside of the expansion tank, causes damage to the sensor which, in turn, leads to warning light illumination.





The new part has a cutout in the area of the coolant level sensor which eliminates the area of contact. Note area indicated by arrow.

CORRECTION
On a customer complaint basis and where there is evidence of sensor to bracket interference, replace the existing bracket with the new modified support bracket currently available through Parts. The part number remains the same as the original part. Additionally, replace the coolant level sensor.





Follow the procedure for removing and replacing the coolant expansion tank (1) as outlined in Repair Instruction 17 11 100. Tank is secured to bracket by two bolts (2)





Remove the two bolts (2) securing the power steering reservoir (3). Position the reservoir away from bracket. Do not disconnect lines.





Remove the two bolts (2) securing oil filter housing (1) to bracket (3).





Remove the three bolts (2) holding the bracket (1) to the body. Carefully slide bracket around oil filter housing and remove. Install in reverse order.





PARTS INFORMATION





WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.