L-SB-0036-15 Rev1 August 19, 2015

Front Brake Vibration

Service
Category Brake

Section Brake (front)

Ovexus

Technical Service Information Bulletin

Lexus Supports
USA ASE cureors dees

Applicability

YEAR(S) MODEL(S)

ADDITIONAL INFORMATION

2007 — 2015 LS460

REVISION NOTICE
December 4, 2015 Rev1:

* The Parts Information section and Repair Procedure section has been updated.

Any previous printed versions of this bulletin should be discarded.

Introduction

Some 2007 — 2015 model year 2WD LS 460 standard (non F-Sport, non AWD) and LS 460L vehicles
may exhibit vibration/pulsation in the brake pedal and/or steering wheel while lightly applying
the brake pedal at high speeds (65 — 75 mph). Follow the procedures in this bulletin to address

this condition.

Warranty Information

OP CODE DESCRIPTION TIME* OFP ™1 «| «€T2
Front Caliper Modification and Front Disc
BRSO1 Brake Repair (One Side) oe 04947-50120
Front Call Medical 7 04947-50130 9B | 13
ront Caliper Modification and Front Disc 43512-50240
BRISOTA Brake Repair (Opposite Side) i

* Time includes BOTH (1) caliper modification, and (2) rotor resurfacing OR rotor replacement.

APPLICABLE WARRANTY

this bulletin.

¢ This repair is covered under the Lexus Basic Warranty. This warranty is in effect for 48 months
or 50,000 miles, whichever occurs first, from the vehicle’s in-service date.

¢ Warranty application is limited to occurrence of the specified condition described in

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Front Brake Vibration

Parts Information

PART NUMBER PART NAME QTY
47748-50200 Spring, Anti-rattle 2
Order the Following Parts ONLY if Needed:
DRIVETRAIN PART NUMBER PART NAME QTY
2WD 43512-50240 Disc, FR 2
- 04465-50260 Pad Kit, Disc Brake, Front 1

Repair Procedure

1. Conduct a road test to verify the condition described in the Introduction.

NOTE

The condition usually occurs when the vehicle is driven at high speeds (60 — 75 mph) and when
braking at low pressure.

Can the vibration condition be duplicated?
* YES — Continue to step 2.
* NOW This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Remove the front wheel.
3. Measure front rotor thickness and refinish or replace as necessary.

A. Measure the front rotor thickness. If the thickness is below the standard specification,
replace the front rotors.

DISC SIZE STANDARD THICKNESS MINIMUM THICKNESS
13.14 inch 30.0 mm (1.181 in.) 27.0 mm (1.063 in.)

B. If the front rotor thickness is within specification, resurface the rotors to a smooth finish
using an on-car brake lathe.

4. Inspect the front brake pads.

Measure the thickness of both front brake pads. If the thickness is out of specification, replace
the front brake pads.

Standard Thickness: 13.5 mm (0.532 in.)
Minimum Thickness: 1.0 mm (0.039 in.)

NOTE
If the thickness is within specification, there is no need to replace the brake pads.

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Front Brake Vibration

Repair Procedure (Continued)

5. Install the additional M-Spring.

Figure 1. M-Spring/Anti-Rattle Spring (P/N 47748-50200)

HINT
M-Spring shown at right.

A. Remove all components from the calipers (including brake pads and all fitting kit components).
Figure 2.

NOTE

Check brake pad surface. If there is any abnormal surface condition, such as wear or
streak marks, replace the brake pads.

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Front Brake Vibration

Repair Procedure (Continued)

B. Install the outer brake pad (with new or Figure 3.
original pads).

C. Install the inner brake pad. Figure 4.

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Front Brake Vibration

Repair Procedure (Continued)

D. Temporarily install the slide pin on the trailing Figure 5.
side of the caliper to secure the brake pads.

E. Reinstall the original M-Spring onto the leading Figure 6.
side of the caliper.

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Front Brake Vibration

Repair Procedure (Continued)

F. Insert the slide pin on the leading side through
the M-Spring.

NOTE

Make sure that the slide pin is inserted
through the spring.

Figure 7.

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Front Brake Vibration

Repair Procedure (Continued)

G. Remove the trailing side slide pin that was previously inserted to secure the brake pads.
The leading side installation is now complete.

NOTE
Confirm proper installation before proceeding.

Figure 8.

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Front Brake Vibration

Repair Procedure (Continued)

H. Install the NEW M-Spring onto the trailing side Figure 9.
of the caliper. [

|. Insert the trailing side slide pin through the M-Spring. The dual M-Spring installation is
now complete.

Figure 10.

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Front Brake Vibration

Repair Procedure (Continued)

J. Install the original pad wear indicator retainer.
Figure 11.

K. Install the original anti-rattle spring.
Figure 12.

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Front Brake Vibration

Repair Procedure (Continued)

L. Repeat the steps on the opposite side. Figure 13.

6. Reinstall the front wheel and torque to specification using the correct tightening sequence
shown in Figure 14.

CAUTION

It is ESSENTIAL to install the front wheel lug nuts with the correct torque specification using a
torque wrench, in the correct star pattern sequence (shown in Figure 14).

NOTICE
Do NOT use an impact gun to tighten the lug nuts.

Torque: 140 N*m (1428 kgf*cm, 103 ft*Ibf)

Figure 14. Star Pattern Sequence

@

1 | CORRECT 2 | INCORRECT

7. Road test to confirm vibration/pulsation condition has been remedied.

© 2015 Lexus, a division of Toyota Motor Sales, USA