Technical Service Bulletin 01-002-23 — 2019 MAZDA CX-9
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
Bulletin Details
| TSB ID | 01-002-23 |
| Manufacturer | |
| Vehicle | 2019 MAZDA CX-9 |
| Component | ENGINE AND ENGINE COOLING:EXHAUST SYSTEM |
| Communication Date |
Bulletin Summary
Some vehicles may have coolant leaks at the cylinder head around the exhaust manifold (as shown below). There may be cracks at the stud bolt hole or at the outside of the exhaust manifold. Cracks may be caused by: - Deformation of the exhaust manifold during usage causing unexpected force to certain areas of the cylinder head. - Residual stress generated during production in the cylinder head material may be greater than expected. The external force from the exhaust system when driving over bumps may cause unexpected force to certain areas of the cylinder head. To eliminate this concern, the design of the exhaust manifold gasket and the cylinder head has been modified to reduce the force on the cylinder head.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.