Tapping noise from the engine during idling; etc., and synchronized to the engine rpm
Mazda technical service bulletin 01-002-21-3767 for 2019-2021 Mazda MAZDA3, 2018-2021 Mazda CX-5 and 2018-2021 Mazda MAZDA6.
- Bulletin number
- 01-002-21-3767
- Component
- Engine and engine cooling
- Summary
- 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.
Owners of these vehicles have filed 503 complaints in the engine category.
Vehicles covered
- Mazda MAZDA3 2019-2021 201920202021
- Mazda CX-5 2018-2021 2018201920202021
- Mazda MAZDA6 2018-2021 2018201920202021
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