BMW i4 M50 G26

The CCU manages all charging functions. When it fails, the car typically loses AC (Level 2) charging ability while DC fast charging may still work. BMW issued a recall for 2022-2023 models where the CCU was not manufactured to specifications. Replacement cost is approximately €2,500-4,000 for parts and labor. Under warranty or recall, BMW replaces the unit free of charge, but wait times of 3-4 weeks for the part are common. For post-warranty cars, this is one of the most expensive potential repairs. A 2024 software update also caused some owners to lose Level 2 charging capability temporarily.

BMW recalled approximately 70,000 EVs (including 2022-2025 i4 models) in mid-2025 for a software error that may erroneously detect a double-isolation condition. As a fail-safe, the high-voltage system shuts down approximately 15-20 seconds after a warning message is displayed, causing loss of power. Power steering and braking remain functional. The fix is an over-the-air software update or dealer reflash at no cost. While the fix itself is free, a shutdown event while driving could result in consequential costs. Verify this recall has been completed before purchase.

Affects i4 models built between May 2023 and January 2024. The heat changeover valve can develop a leak when temperatures drop significantly below freezing. The first symptom is typically loss of cabin heating. BMW issued a service action (SIB 64 06 24) to replace all coolant changeover valves on affected vehicles. If the heater core was also damaged by running dry, both the valve and heater must be replaced together. The repair is covered under the service action for affected VINs, but post-warranty replacements cost €500-1,500 depending on whether only the valve or additional components need replacing.

A poll on i4talk.com showed approximately 19% of respondents experienced some form of charging port door issue, though self-selection bias likely inflates this figure. The actuator behind the charging flap can fail, preventing the door from unlocking or closing. The flap mechanism itself is relatively inexpensive, but the repair requires partial disassembly. If caught early, the fix is straightforward. In rare cases where the charging port contacts themselves degrade, the repair can be significantly more expensive.

The i4 M50 has rear air suspension as standard. While not widely reported within the first few years, air suspension components are known wear items that typically develop leaks after 5-8 years. Symptoms include the car sitting lower on one side after being parked overnight, or failure to maintain ride height. A single strut replacement costs approximately €1,000-1,500 for parts and labor. If the compressor is also damaged from overworking, the repair can reach €2,000-2,500. Early-model owners on forums report few issues so far, but this is a future risk as these cars age.

BMW has issued multiple recalls for improperly assembled high-voltage battery cell modules affecting 2022-2024 i4 models. Issues include insufficient weld seams, improperly secured electrical connections in cell monitoring circuits, and excessive force during assembly causing frame stress. Symptoms include drivetrain malfunction warnings followed by complete power loss. Most affected vehicles have been identified and repaired under recall. For a used car buyer, verifying all battery-related recalls have been completed is essential. Out-of-warranty module replacement is very expensive.

Multiple owners report a knocking or crunching sound from the front suspension, particularly over small undulations at low speeds. BMW dealers have attempted fixes including replacing stabilizer rod links (per a service bulletin) and front shock absorbers, with mixed results. The noise is often difficult to diagnose because it disappears after the suspension is unloaded on a lift. The heavy curb weight of the i4 (approximately 2,215 kg for the M50) puts additional stress on front suspension components. While primarily a nuisance issue, worn bushings or links should be replaced to prevent accelerated tire wear.

Like all modern EVs, the i4 relies on a small 12V auxiliary battery for comfort access, key detection, and system wake-up. When this battery fails, the car cannot be started or unlocked. Expected lifespan is 4-6 years depending on climate and usage patterns. Replacement costs approximately €200-400 including labor and battery management recalibration. Some owners have experienced premature failure linked to CCU-related charging issues keeping the 12V system from charging properly.

Early i4 models with iDrive 8 experienced frequent screen blackouts, frozen touchscreens, and CarPlay disconnections. The screen typically recovers within 1-2 minutes or after a manual reset (holding the volume knob). Subsequent software updates have significantly reduced the frequency of these glitches. For most owners this is a software-level annoyance with no repair cost, but persistent cases may require a head unit reflash at the dealer (€100-300). Rarely, hardware replacement of the head unit is needed.