T-SB-0103-21

T-SB-0103-21
December 15, 2021
Engine Noise on Acceleration
Service
Category
Engine/Hybrid System
Section
Engine Mechanical
Market USA
Applicability
YEAR(S)
MODEL(S)
2020 - 2022
Highlander HV
ADDITIONAL INFORMATION
Introduction
Some 2020 – 2022 model year Highlander Hybrid vehicle customers may express a concern of
engine noise on acceleration from 0 – 45 mph. Follow the Repair Procedure in this bulletin to
address this condition.
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EG1920
Replace the Rear Engine Mount Insulator
2.4
12371-#####*
91
99
*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being
repaired by searching for the parts in the Electronic Parts Catalog using the VIN filter.
APPLICABLE WARRANTY
 This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for
60 months or 60,000 miles, whichever occurs first, from the vehicle’s in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.
© 2021 Toyota Motor Sales, USA
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T-SB-0103-21
December 15, 2021
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Engine Noise on Acceleration
Parts Information
PART NUMBER
PREVIOUS
NEW
12371-F0170
12371-F0210
PART NAME
QTY
Insulator, Engine Mounting, Rear
1
Repair Procedure
1. Does the vehicle customer express a concern of engine noise on acceleration from
0 – 45 mph?

YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Check ALL other components that may contribute to the customer perceived engine noise,
including but not limited to the following:

Intake system.

High pressure fuel pump.

Exhaust system.

All motor and transmission mounts.

Tires.

Insulation material (undercarriage, firewall, hood, etc.).
Have ALL other components that may contribute to a customer perceived engine noise been
checked and has it been determined they do NOT contribute to the customer perceived
engine noise?

YES — Continue to step 3.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
3. Remove the rear engine mount.
Refer to TIS, applicable model and model year Repair Manual:

2020 – 2022 Highlander HV:
Engine / Hybrid System – Engine Mechanical – “Engine Assembly: Removal”
4. Install the NEW updated rear engine mount.

2020 – 2022 Highlander HV:
Engine / Hybrid System – Engine Mechanical – “Engine Assembly: Installation”
5. Confirm the condition has been improved.
© 2021 Toyota Motor Sales, USA