BMW xDrive40
Fifth generation of the BMW electric drivetrain with a single motor. High efficiency through an electrically excited synchronous motor without rare-earth magnets. Watch the 12V battery and control unit software.
Electric everyday
Solid electric drivetrain — comfortable and efficient, but not exciting.
Engine Weaknesses 6
A Vitesco switching valve (64119462114) in the cooling circuit fails, especially in frost. Coolant runs out before the warning light activates. BMW temporarily imposed a global delivery stop on new i4s.
Symptoms: Coolant puddle under the car; heater fails before warning light illuminates; coolant level warning appears too late.
A software bug in the HV system monitoring triggers a preventive drivetrain shutdown even when no actual hazard exists. Vehicle loses drive within 15–20 seconds. BMW recalled 70,852 vehicles (i4/iX/i5/i7, MY 2022–2025).
Symptoms: Warning 'High-voltage system fault' followed by loss of drive; steering and brake assist remain active; car coasts slowly to a stop.
HV battery cell modules were not manufactured to specification. Module frame can crack, shut down the high-voltage system, or cells can overheat to fire risk. Affected: i4, iX, i7 (production 07.2021–02.2024).
Symptoms: Loss of drive while moving; HV battery warning; in rare cases smoke or fire.
Production issue on Gen5 electric vehicles. Heat exchanger valve leaks; car can be in the workshop for weeks. BMW replaces under warranty.
Symptoms: Coolant loss, thermal management fault, reduced charging performance
Under sustained full load on the motorway the system throttles drive output to protect against overheating. Documented especially on the i4 eDrive40 and early iX models. Motor and battery temperatures reach 100°C+.
Symptoms: Noticeably reduced acceleration after 30+ minutes of motorway driving; charging performance drops on rapid back-to-back charges; warning 'Drive restricted'.
Heat pump produces loud droning and whirring inside the cabin, especially when heating. BMW issued a software update; problem not fully resolved.
Symptoms: Strong droning/whirring with heating on, vibrations felt
Vehicle Weaknesses 5
The BMW iX is affected by the major IBS recall (production from June 2022). Faulty brake electronics can deactivate ABS and DSC. Approximately 175,000 vehicles affected in Germany. Replacement is free of charge.
A software fault in the airbag control unit can prevent the airbag warning lamp from illuminating during an actual system failure. The driver receives no warning. BMW resolves via software update.
The front collision sensor triggers unexpected emergency stops on the motorway while cruise control is active, with no obstacle present. A software update from BMW is required.
At outside temperatures around 7–9°C, the climate system draws up to 5 kWh/h. Despite the heat pump, winter range loss is significant. Pre-conditioning at the charger is recommended.
The iDrive system freezes, drops smartphone connections or unexpectedly enters emergency mode. Navigation drops out. Many issues can be resolved by restarting the system.
Reports & Tests
104 owner complaints filed with NHTSA (2021–2026). Most reported: Electrical (29), Collision Avoidance (28), Other (16).