SA-005-19

Mazda North American Operations
Irvine, CA 92618-2922
Service Alert
Subject:
TAPPING / RATTLING NOISES HEARD FROM ENGINE
Service Alert No.: SA-005/19
Last Issued: 02/01/2019
BULLETIN NOTES
This Service Alert supersedes the previously issued Service Alert(s) listed below. The changes are noted in
Red text.
Previous Service Alerts: Date(s) Issued:
SA-015/18
03/22/2018
APPLICABLE MODEL(S)/VINS
2018-2019 CX-5 vehicles equipped with cylinder deactivation
2018-2019 Mazda6 vehicles equipped with cylinder deactivation
DESCRIPTION
A tapping/rattling noise may be noticed from the valve train area. This condition usually occurs after the
engine has been turned off at normal operating temperature and then not warmed up to full operating
temperature during the next series of cold starts.
This operating condition can occur, for example, on new vehicles which have been delivered to Mazda
dealers (due to loading and unloading from transport trucks or customers moving their vehicles in and out of
their garages to wash the vehicle, etc.)
REPAIR PROCEDURE
1. Check the engine oil level, correct if necessary.
2. Start the engine and let it idle at normal operating temperature with the hood open to verify the
valve train tapping/rattling noise.
3. If a tapping/rattling noise can be heard from the valve train, run the engine for two (2) minutes
without a load at approximately 2,500 to 3,000 rpm (bleeding procedure).
4. With the engine at idle, listen for valve train noise again.
 If no further noise can be heard, the repair is complete. No additional steps are necessary.
Page 1 of 2
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,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Service Alert No.: SA-005/19
Last Issued: 02/01/2019
 If the noise continues, go to the next step.
5. Perform a vehicle road test for 3-5 miles.
 If no further noise can be heard, the repair is complete.
 If the noise continues, contact the Technical Assistance Hotline.
Page 2 of 2
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,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.