There is a SCR/ AWD harness that has a unique routing, over the SCR tank cover
Mazda technical service bulletin 5421K for 2019 Mazda CX-5.
- Bulletin number
- 5421K
- Component
- Engine and engine cooling
- Summary
- There is a SCR/ AWD harness that has a unique routing, over the SCR tank cover. Over time, contamination (i.e. sand, dirt) on the SCR/AWD harness may cause wear on the harness wiring and insulation due to vibration of the SCR tank cover. In the worst-case scenario, the electrical circuits in the wiring harness can be disconnected with the MIL/SCR/4WD warning lights illuminating. Inspect the SCR/AWD harness for signs of damage. If the CORE WIRES inside the harness have no damage, protective shrink tubing will be installed on the harness. If CORE WIRE damage is found in the harness, the harness will be repaired with supporting parts.
Owners of these vehicles have filed 135 complaints in the engine category.
Vehicles covered
- Mazda CX-5 2019 2019
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