Wheels - Fastening Bolts

9220bmw01

Group 36
Wheels and Tires


Bulletin Number
36 02 92 (3512)


Woodcliff Lake, NJ
February 1992
Product Engineering


SUBJECT:
Wheel Fastening Bolts

MODELS:
All

Situation:
In approximately late February 1991 a running production change was made to the wheel bolt, part number 36 13 1 126 191.

The newer style bolts have a hollowed-out head, and can be differentiated from the early style by their "yellow chrome" plating. (Early bolts have "silver chrome" plating.) Because of this design change the new bolts are approximately 9 grams (.3 oz) lighter than the early bolts.

Early and late style bolts should not be mixed on one wheel as the weight difference could cause an imbalance when the wheel is mounted on the car. This could amount to as much as 2.9 grams (.1 oz) imbalance on a mounted 14" tire and wheel assembly, or 2.7 grams (.09 oz) on a 15" assembly.

Warranty
Status: Information only.