Brakes - Brake Rotor Minimum Thickness Information

Brakes - Brake Rotor Minimum Thickness Information

SI M34 01 10

Brakes

June 2011

Technical Service

SUBJECT

Brake Rotor Minimum Thickness

MODEL

All

INFORMATION

MINI brake discs/rotors are stamped with a Minimum Thickness. The stamped minimum thickness is used to determine whether the brake

discs/rotors require replacement during a brake service, such as a pad replacement. However, some motor vehicle inspection procedures require the

measurement of brake discs/rotors. An additional minimum thickness specification for the purpose of motor vehicle inspection is provided in the

Technical Data section of the Repair Manual. Examples of the two specifications are described in this bulletin.

The Stamped Minimum Thickness (MIN TH) is utilized as described below:

New brake pads may only be installed if the brake disc thickness is greater than or equal to the minimum brake disc thickness (MIN TH) (not

including perforated brake discs).

For vehicles fitted with perforated (cross-drilled) brake discs, new brake pads may only be installed if the brake disc thickness is greater than the

stamped minimum thickness (MIN TH).

2002-2006 Mini Cooper (R50) L4-1.6L (W10) Page 34

The Minimum Thickness for general inspection (Motor Vehicle Inspection) is defined as follows:

Nominal size thickness minus 2.4 mm (not including perforated brake discs)

For vehicles fitted with perforated (cross-drilled) brake discs: nominal size thickness minus 1.6 mm

Note:

Nominal size thickness refers to the width of a new rotor.

Always refer to the Repair Manual for model-specific information.