01-006-20-3695

Technical
Service Bulletin
Mazda North American Operations
Irvine, CA 92618-2922
Subject:
Bulletin No.: 01-006/20
TAPPING NOISE FROM ENGINE
Last Issued: 04/23/2020
APPLICABLE MODEL(S)/VINS
2019-2020 Mazda3 (US spec)
2018-2020 Mazda6 (US spec)
2018-2020 CX-5 (US spec)
DESCRIPTION
Some vehicle may exhibit a tapping noise from the engine during idling; etc., and synchronized to the
engine rpm. The tapping noise may be caused by the switchable hydraulic lash adjuster (HLA), which may
not work properly due to air bubbles accumulated in the oil passage in it.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Verify customer concern.
2. With the vehicle parked, keep the engine rpm at 2000 rpm for 5 minutes.
NOTE: Engine rpm will fall to idle normally due to the failsafe function.
3. Again, keep the engine rpm at 2000 rpm for 5 minutes.
NOTE:


DO NOT skip this step even if the noise is gone.
Engine rpm will fall to idle normally due to the failsafe function.
4. Confirm the noise is gone.
NOTE: If the noise still exists, check the HLA and the switchable HLA. If they can be pressed down with a
finger, replace the affected sets of the HLA, the switchable HLA and the rocker arms, and claim as a
separate warranty repair.
5. Verify repair.
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.
© 2020 Mazda North American Operations, U.S.A.
04/23/2020 12:15 PM tlawrenc
Bulletin No.: 01-006/20
Last Issued: 04/23/2020
WARRANTY INFORMATION
NOTE:



This warranty information applies only to verified customer complaints on vehicles eligible for
warranty repair.
This repair will be covered under Mazda’s New Vehicle Limited Warranty term.
Additional diagnostic time cannot be claimed for this repair.
Warranty Type
A
Symptom Code
80
Damage Code
90
Part Number Main Cause
Quantity
Operation Number / Labor
Hours:
PYFA-12-1A0A
0
XXS2DXAX / 0.4 Hrs.
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.
© 2020 Mazda North American Operations, U.S.A.
04/23/2020 12:15 PM tlawrenc