IsItAGoodCar
Reliability Guide

Common Problems with the
2013–2016 BMW i3 (I01)

We've identified 4 known issues that can affect the 2013–2016 BMW i3 (I01). 2 of these are serious faults that could be expensive to repair.

4
Known Issues
2
Serious
1
Moderate
1
Minor

All Known Issues

Motor Mount & Bolt Failure

SeriousEngine

Early models had plastic motor mounts or weak mounting bolts that could snap under the high torque of the electric motor, potentially damaging the drivetrain.

Est. Repair Cost: £1,000–£2,000
Warning Signs:

Loud "thump" or bang under hard acceleration or regenerative braking, Vibration through the cabin

What to Inspect:
  • Check if the upgraded aluminium mounts or stronger bolts have been fitted
  • Inspect the motor area for any signs of movement or loose hardware
Verified by IsItAGoodCar Research Team

KLE (Onboard Charger) Failure

SeriousElectrics & Electronics

The Convenience Charging Electronics (KLE) module can fail, leading to reduced AC charging speeds or a total inability to charge from a wallbox.

Est. Repair Cost: £1,000–£2,500
Warning Signs:

AC charging restricted to 3.7kW (half speed), Car refusing to start an AC charge, Fault message on iDrive

What to Inspect:
  • Test the car on a 7kW or 11kW AC charger and check the draw
  • Check if the updated KLE unit was fitted under warranty
Verified by IsItAGoodCar Research Team

REx Engine Corrosion & Misfires

ModerateEngine

The Range Extender (a 650cc scooter engine) can suffer from internal corrosion or stale fuel if not used regularly. It is sensitive to spark plug and oil condition.

Est. Repair Cost: £500–£1,500
Warning Signs:

REx engine refusing to start, Rough running or "Drivetrain" error when the REx is active, Strong smell of petrol or oil

What to Inspect:
  • Request a manual start of the REx (Maintenance Mode) during the test drive
  • Check the oil and spark plug service history
  • Look for fuel pressure sensor recall completion
Verified by IsItAGoodCar Research Team

12V Auxiliary Battery Failure

MinorElectrics & Electronics

The small 12v battery powers the car's computers. When it fails, the car throws dozens of unrelated error codes and may refuse to engage the high-voltage system.

Est. Repair Cost: £150–£250
Warning Signs:

Random "High Voltage System" errors, Car won't "Ready" or unlock, Screen glitches

What to Inspect:
  • Check the date code on the 12v battery (should be replaced every 4-5 years)
  • If original, budget for immediate replacement
Verified by IsItAGoodCar Research Team

Buying Tips for 2013–2016 BMW i3 (I01)

  • ✓On REx models, ensure the petrol engine starts and runs smoothly; many are never used and can seize or corrode internally
  • ✓Check the custom narrow Bridgestone Ecopia tyres for wear; they are expensive and can wear quickly on the rear
  • ✓Inspect the CFRP door sills and the plastic body panels for any cracks or structural damage
  • ✓Verify the high-voltage battery capacity via the hidden service menu to ensure it hasn't degraded excessively
2017
Check a 2013–2016 BMW i3 (I01) by Registration