2016 — 2018
94Ah Electric + 647cc Range Extender
Hybrid (Petrol/Electric)
Listen closely to the petrol Range Extender (REx) engine as it kicks in; ensure the transition is smooth and that there are no abnormal rattling or vibrating sounds at idle.
Check the condition of the skinny, unique-sized tires; ensure they have even tread wear, as uneven wear may indicate a need for a wheel alignment or suspension adjustment.
Operate the AC and heater during your drive; verify that both reach temperature quickly, as the heat pump system is vital for range efficiency in cooler New Zealand conditions.
Inspect the charge port door and locking mechanism for any signs of sticking or moisture ingress, as the electronic latch can occasionally be sensitive in coastal environments.
Consider a full drivetrain health check and potential 12-volt auxiliary battery replacement.
Monitor the range extender engine oil levels and check for any minor cooling system seepage around the hose junctions.
Evaluate the condition of the drive motor mounts and suspension bushings to maintain the car's characteristic handling.
Verify the Service History: Ensure the REx engine has received regular oil and filter changes regardless of low mileage.
Brake Maintenance: Because of regenerative braking, the physical friction brakes can see less use; have a mechanic check for surface corrosion or seized sliding pins.
Cabin Air Filter: Keep this fresh to ensure the climate control system operates efficiently and prevents windscreen fogging.
Software Updates: Ask the dealer or a specialist if the vehicle is running the latest firmware, as this can optimize battery management and range.
Cooling System Flush: Periodically check the state of the dedicated battery coolant to ensure the thermal management system remains clean and effective.
Estimated repair costs if issues arise
In many BMW i3s, if the 12V battery drops below optimal voltage, the car can display various 'ghost' warning lights. It is a standard consumable, so you might eventually need to budget for a replacement to keep the onboard electronics happy.
Since the REx is essentially a small motorcycle engine, it requires standard internal combustion maintenance. If this component needs attention in the future, it is wise to set aside funds for basic engine servicing and potential belt tensioner checks.
The i3 uses a specific, narrow-profile tyre size to improve aerodynamics. Depending on your driving style, you might eventually need to budget for these as they aren't always stocked on the shelf at standard tyre shops.
As with any vehicle with high-torque electric motors, the suspension components work hard. If you notice a slight knock over bumps, you might eventually need to budget for bushing replacements to restore the ride quality.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer