Tools Required

Caution: Refer to Brake Dust Caution in the Preface section.

Important: 

1. Measure the brake rotor thickness. Refer to Brake Rotor Thickness Measurement.
2. Measure the brake rotor thickness variation. Refer to Brake Rotor Thickness Variation Measurement.




Important: The brake rotor is indexed to the hub during production in order to minimize LRO.

3. If match marks are not evident, use paint in order to mark the relative position of the following components:

•	The brake rotor (1)

•	A wheel stud (2)

•	The hub (3)

4. Remove the brake rotor from the vehicle. Refer to Front Brake Rotor Replacement or to Rear Brake Rotor Replacement as applicable.

Important: Rust or contaminants on the hub flange or on the brake rotor mating surfaces may cause excessive LRO of the brake rotor, which could lead to brake pulsation.

5. Inspect the mating surface of the hub flange and the brake rotor. If rust or foreign particles are on the hub flange or the brake rotor mating surfaces, perform the following steps:

5.1.	Use the J 42450-A , or equivalent, in order to thoroughly clean any rust or contaminants from the mating surface of the hub flange.

5.2.	Use the J 41013 , or equivalent, in order to thoroughly clean any rust or contaminants from the mating surface of the brake rotor.

5.3.	Clean the friction surfaces of the brake rotor with denatured alcohol or an equivalent brake cleaner.

6. Align the paint marks and install the rotor to the hub flange.



7. Hold the rotor firmly in place against the hub flange. Install one of the J 45101-100 and one wheel nut (2) onto the upper-most wheel stud.
8. Continue to hold the rotor secure and tighten the wheel nut firmly by hand.



9. Install the remaining J 45101-100 and the wheel nuts onto the wheel studs and tighten the nuts firmly by hand in a star pattern.

Notice: Refer to Fastener Notice in the Preface section.

10. Tighten the wheel nuts in a star pattern in order to retain the rotor to the hub. Refer to Fastener Tightening Specifications.



11. Perform the following steps in order to measure and record the assembled LRO of the brake rotor.

11.1.

Install the J 45101 , or equivalent. Position the indicator button so it contacts the brake rotor friction surface 10 mm (0.39 in) from the outer edge of the rotor.

11.2.

Verify the indicator is at a 90 degree angle to the brake rotor.

11.3.

Rotate the rotor until the indicator dial displays the lowest reading.

11.4.

Set the dial to zero.

11.5.

Rotate the rotor until the indicator dial displays the highest reading.

11.6.

Mark the location of the high spot relative to the nearest wheel stud or studs.

11.7.

Measure and record the amount of LRO.

12. Compare the LRO to the following specification:

Specification

•	Front brake rotor maximum allowable LRO: 0.04 mm (0.002 in)

•	Rear brake rotor maximum allowable LRO: 0.04 mm (0.002 in)

13. If the LRO measurement is within the specification, complete the following steps:

13.1.

Remove the J 45101 .

13.2.

Install the brake caliper and the brake pads. Refer to Front Disc Brake Pads Replacement or to Rear Disc Brake Pads Replacement as applicable.

13.3.

With the engine OFF, gradually apply and release the brake pedal several times in order to position the caliper pistons.

13.4.

Remove the wheel nuts.

13.5.

Remove the J 45101-100 .

13.6.

Install the tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation.

14. If the LRO measurement EXCEEDS the specification and you REFINISHED or REPLACED the rotor, adjust the LRO. Refer to Brake Rotor Assembled Lateral Runout Correction.
15. If the LRO measurement EXCEEDS the specification and you DID NOT refinish or replace the rotor, refinish the rotor in order to attain true parallelism. Refer to Brake Rotor Refinishing.
16. Measure the LRO in order to verify the rotor is within the specification.