Exhaust System - Drone In Park While Stationary
L-SB-0066-09June 1, 2009
Exhaust Drone Noise at Operating Temperature While Stationary in Drive
Service Category
Engine/Hybrid System
Section
Intake/Exhaust
Market
USA
Applicability
Introduction
Some customers may experience a drone noise or slight vibration with the engine at operating temperature and the vehicle stationary in Drive range. Use the following repair procedure to address customer concerns.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Lexus Comprehensive 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 correction of a problem based upon a customer's specific complaint.
Parts Information
Repair Procedure
1. Start the engine and confirm the drone noise/vibration is present while stationary in Drive range after the vehicle has reached operating temperature.
If the drone noise/vibration is NOT present after reaching operating temperature, this bulletin does NOT apply.
2. Inspect the position of the No.5 exhaust pipe support bracket and exhaust pipe hanger.
If the exhaust pipe hanger is positioned below the No.5 exhaust pipe support bracket (Figure 1) this bulletin does NOT apply.
3. If the exhaust pipe hanger has rotated upward beside the No.5 exhaust pipe support bracket (Figure 2) replace the No.5 exhaust pipe support bracket.
4. Start the engine and verify the repair.