Engine & fuel system
3 documented faults — symptoms, causes and workshop fixes.
Stop-start system warning lamp illuminated in instrument panel after reverse gear is engaged
Overview
- Affects
- All models with stop-start system and parking aid control, VIN →1123559.
- Remedy
- Software update
Cause
Instrument panel software fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program instrument panel with upgraded software.
Data: Motorwise Workshop. Bulletin 2.
Engine coolant leak from coolant pipe connection on LH side of cylinder block
Cause
Unsatisfactory design of engine coolant pipe O-ring.
Repair
- Fit modified engine coolant pipe complete with O-ring.
Data: Motorwise Workshop. Bulletin 8.
Central locking not operating when using remote control
Overview
- Affects
- All models.
- Remedy
- Software update
Symptoms
Irregular operation of lane departure warning system. Irregular operation of stop-start system.
Cause
Multifunction control module software fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program multifunction control module with upgraded software. Note: To carry out an effective repair a software upgrade will be required - refer to manufacturer.
Data: Motorwise Workshop. Bulletin 9.
Electrical & ignition
1 documented fault — symptoms, causes and workshop fixes.
Seat belt warning buzzer and warning lamp on when seat belt fastened
Overview
- Affects
- All models.
Cause
Front seat belt buckle wiring harness damaged due to trapping in seat height adjustment linkage.
Repair
- Repair or replace front seat belt buckle wiring harness as necessary.
- Protect wiring harness with convoluted plastic conduit.
Data: Motorwise Workshop. Bulletin 3.
Brakes
2 documented faults — symptoms, causes and workshop fixes.
Hill hold function inoperative when brake pedal is released during stop-start system operation
Overview
- Affects
- All models with 1.4 16V/1.4 16V Turbo engines, VIN →01086314.
- Remedy
- Software update
Cause
ABS/ESP control module software fault.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Re-program ABS/ESP control module with upgraded software.
Data: Motorwise Workshop. Bulletin 1.
Brake pedal sticking or not returning causing overheating of brake discs
Symptoms
Brakes binding.
Cause
Unsatisfactory design of brake pedal assembly.
Repair
- Fit modified brake pedal assembly.
Parts4 parts
| Part | Part number | Qty |
|---|---|---|
| Brake pedal | 77366184 | 1 |
| Brake pedal pivot pin | 71747803 | 1 |
| Brake pedal pivot bush | 71740397 | 2 |
| Clip | 71747693 | 1 |
Data: Motorwise Workshop. Bulletin 5.
Steering
1 documented fault — symptoms, causes and workshop fixes.
Multifunction steering wheel controls intermittent operation or not working
Cause
Multifunction steering wheel control button assemblies faulty.
Repair
- Fit new multifunction steering wheel control button assemblies.
Data: Motorwise Workshop. Bulletin 4.
Clutch & gearbox
1 documented fault — symptoms, causes and workshop fixes.
Rumbling noise from clutch assembly when reversing
Overview
- Affects
- All models with 1.4 Turbo MultiAir engine and C635 transmission code.
- Remedy
- Fit modified part
- Parts
- 2 parts
Cause
Unsatisfactory design of clutch assembly.
Repair
- Fit modified clutch assembly.
- Check front wheel alignment and adjust if necessary.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Clutch kit | 55255355 | 1 |
| Bolt | 7748285 | As required |
Data: Motorwise Workshop. Bulletin 10.
Air conditioning & heating
1 documented fault — symptoms, causes and workshop fixes.
Noise from air conditioning (AC) when operating
Overview
- Affects
- All models with 1.4 16V/1.4 MultiAir petrol engines and air conditioning (AC).
- Remedy
- Fit modified part
- Parts
- 2 parts
Cause
Vibration through air conditioning (AC) pipes.
Repair
- Fit modified AC pipes.
- Recharge AC system with correct quantity of refrigerant.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| AC pipe | 51826328 | 1 |
| AC pipe | 51815474 | 1 |
Data: Motorwise Workshop. Bulletin 6.
Wipers & visibility
1 documented fault — symptoms, causes and workshop fixes.
Windscreen wiper blade not clearing windscreen efficiently
Cause
Unsatisfactory design of windscreen wiper arm.
Repair
- Fit new driver's side windscreen wiper arm.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| Windscreen wiper arm (LHD) | 50521548 | 1 |
| Windscreen wiper arm (RHD) | 50521549 | 1 |
Data: Motorwise Workshop. Bulletin 7.
Other
2 documented faults — symptoms, causes and workshop fixes.
Poor performance or failure of AC system
Overview
- Affects
- All models with air conditioning (AC), VIN →1134577.
- Remedy
- Fit modified part
- Parts
- 3 parts
Cause
Refrigerant leak from AC pipe seal rings.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Fit modified AC pipe seal rings. Recharge AC system with correct quantity of refrigerant.
Parts3 parts
| Part | Part number | Qty |
|---|---|---|
| Seal ring | 10877887 | 1 |
| Seal ring | 10877980 | 2 |
| Seal ring | 10878180 | 1 |
Data: Motorwise Workshop. Bulletin 11.
Poor performance or failure of AC system
Overview
- Affects
- All models with 0.9/1.3/1.4 engines and air conditioning (AC).
- Remedy
- Fit modified part
- Parts
- 2 parts
Cause
Failure of AC condenser.
Repair
- Carry out electrical, mechanical and component tests (as applicable) to eliminate any other possible cause(s).
- If no fault(s) found: Fit modified AC condenser Recharge AC system with correct quantity of refrigerant.
Parts2 parts
| Part | Part number | Qty |
|---|---|---|
| AC condenser (petrol models with non-turbocharged engines) | 50526514 | 1 |
| AC condenser (except petrol models with non-turbocharged engines) | 50526515 | 1 |
Data: Motorwise Workshop. Bulletin 12.
Glossary
Technical terms used in this guide.
- VIN
- Vehicle identification number — 17 characters, found at the base of the windscreen and on the V5C logbook
- AC
- Air conditioning — the system that cools the cabin
- ABS/ESP
- Anti-lock braking and electronic stability programme — the system that stops the wheels locking and keeps the vehicle stable
- LHD
- Left-hand drive — steering wheel on the left
- RHD
- Right-hand drive — steering wheel on the right
- Control Module
- A control unit for one of the vehicle's systems (engine, gearbox, brakes, body, and so on)
- Instrument Panel
- The dashboard display that shows warning lights and messages
- Multifunction Control Module
- The control module that runs shared electrical functions (lights, wipers, locking, and so on)
- Parking Aid
- The reversing/parking sensors and their control module
- Refrigerant
- The gas/liquid that carries heat in the air-conditioning system
- Re-Program
- Update the software on a control module using the manufacturer's diagnostic tool
- Stop-Start
- The system that cuts the engine at idle and restarts it when you pull away
- Wiring Harness
- The bundled cables that carry power and signals around the vehicle
Frequently asked questions
What are the common faults with the Alfa Romeo MiTo 1.4 MultiAir 170 Turbo?
This guide contains 12 workshop bulletins for the Alfa Romeo MiTo 1.4 MultiAir 170 Turbo. Of these, three concern the engine and fuel system and two the brakes. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Alfa Romeo MiTo 1.4 MultiAir 170 Turbo 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 Alfa Romeo MiTo 1.4 MultiAir 170 Turbo faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.