Electrical & ignition
1 documented fault — symptoms, causes and workshop fixes.
Headlamps not illuminating when headlamp switch in 'AUTO' position
Cause
Faulty ambient light sensor, incorporated in rain sensor.
Repair
- Fit new ambient light sensor.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Ambient light sensor | C513 66 5G0 | 1 |
Data: Motorwise Workshop. Bulletin 3.
Steering
1 documented fault — symptoms, causes and workshop fixes.
Electronic stability program (ESP) warning lamp illuminated. Trouble code stored: U0428
Overview
- Affects
- All models with electronic stability program (ESP).
- Fault codes
U0428
Cause
Incorrect calibration of steering angle sensor.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Carry out steering angle sensor calibration: Erase trouble codes. Drive vehicle at 12 mph (20 kph). Ensure steering in straight-ahead position.
Data: Motorwise Workshop. Bulletin 2.
Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
Noise/vibration from AC/heater fascia centre vents when AC/heater blower motor on high blower speed
Cause
Repair
- Fit modified AC/heater fascia centre vent(s), as required.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| AC/heater fascia centre vent, right | C513 64 930A | 1 |
| AC/heater fascia centre vent, left | C514 64 930A | 1 |
Data: Motorwise Workshop. Bulletin 1.
Glossary
Technical terms used in this guide.
- Trouble Codes
- Standardised fault codes stored by the engine control module, read with a diagnostic tool
- ESP
- Electronic stability programme — brakes individual wheels to stop a skid
- AC/Heater
- The heating and air-conditioning system
- Fascia
- The dashboard and the surrounding interior panel
- Steering Angle Sensor
- Tells the stability-control system which way the steering wheel is pointing
- Calibration
- Setting a sensor or module so its readings match the real world
Frequently asked questions
What are the common faults with the Mazda 5 2.0?
This guide contains three workshop bulletins for the Mazda 5 2.0. Of these, one concerns the electrical and ignition and one the steering. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Mazda 5 2.0 have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Mazda 5 2.0 faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.