Kia Sportage Mk3 1.7 CRDi — Alternator / Smart Charge System Failure
Modern vehicles use smart charging systems to reduce engine load, but the complex regulators on the alternators frequently fail.
Severity
SevereDIY Difficulty
Moderate
Est. Cost
£250–£450
OBD Codes
P0620P0622Electrics
Typical layout and location for the Electrics assembly.
Symptoms
- Red battery warning light on dashboard
- 'Charging System Fault' message
- Systems shutting down (radio, power steering) as battery depletes
- Car fails to start
Root Cause
The internal voltage regulator or diode pack on the alternator burns out due to heat and age. Occasionally, a slipping auxiliary belt causes the issue.
How To Fix
- Test battery voltage with engine running (should be 13.8V - 14.7V).
- If below 12.5V, replace the alternator.
- Always replace the auxiliary drive belt at the same time.
- Cost: £250-450
Estimated Repair Costs
| Repair Option | Est. Cost (GBP) |
|---|---|
| DIY (parts only) | £100–£180 |
| Independent Garage | £250–£450 |
| Main Dealership | £400–£720 |
Other Faults on This Variant
Turbo Lag and Sticking VNT Actuator
ModerateOwners often complain of dangerous flat spots or severe turbo lag when pulling out of junctions. This is usually caused by a sticking turbo actuator.
Fuel Filter Housing Air Leak (Starting Issues)
ModerateA very common starting issue on the 1.7 CRDi in cold weather. The engine turns over endlessly but refuses to fire due to air entering the fuel system.
Air Conditioning Condenser Leak (Stone Damage)
MinorThe air conditioning condenser is mounted at the very front of the cooling pack, making it highly susceptible to stone damage from the road, leading to refrigerant loss.
Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.