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CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
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writing.
© 2009 Mazda Motor of America, Inc.
Subject:
DIAGNOSTIC PROCEDURE FOR ENGINE NOISE REPAIR
Bulletin No: 01-053/09
Last Issued: 12/01/2009
Service Bulletin
Mazda North American Operations
Irvine, CA 92618-2922
MULTI-MODEL - DIAGNOSTIC PROCEDURE FOR ENGINE NOISE REPAIR
APPLICABLE MODEL(S)/VINS
2006 - 2010 MX-5
2004 - 2010 Mazda3
2006 - 2010 Mazda5
2003 - 2010 Mazda6 2.3L/2.5L
DESCRIPTION
Some vehicles may exhibit various types of engine noise such as knocking, ticking, tapping, rattling, grinding,
squealing, squeaking, thumping, whining, creaking, popping, clicking or roaring. If you encounter engine noise,
refer to the following repair procedure. If any parts can be reused after inspection, be sure to reuse them.
REPAIR PROCEDURE
DIAGNOSTIC PROCEDURE
Step Inspection Result Action
1 Verify if the noise is coming from the engine or body.
Listen to the noise with a sound scope or Chassis Ear
at the engine or body then compare. Refer to the
following illustrations for points to measure the noise.
Is the noise only heard on the body side?
Is the noise heard on the body side louder than that
heard on the engine side?
If Yes to
either
question
Engine mount trouble is sus-
pected. Check torque of en-
gine mount bolt, oil leak from
mount and engine mount
damage according to
Workshop Manual (section
01-10 MECHANICAL).
No Go to the next step.
2 Verify if the noise is coming from the drive belt.
Using a sound scope, is the noise heard from around
the parts driven by a drive belt, such as generator or
A/C compressor?
Yes Go to “Generator Drive Belt
and Related Parts Noise”
procedure.
No Go to the next step.
3 Verify if the noise is coming from the intake manifold.
Is the noise heard from around the intake manifold?
Yes Go to the next step.
No Go to Step 5.
