Cheap BMW i4 Battery

The BMW i4 launched in 2022 and received a facelift for the 2024 model year, so a battery from a 2022–2023 car and one from a 2024 car may differ in spec or physical configuration. The key fitment factors are the battery's physical size, voltage, capacity, and BMS compatibility rather than the year alone. Because this boundary is a real consideration, confirm with the breaker that the part number and spec match your exact registration before buying. Never assume year-to-year compatibility without checking.

Trim level alone does not determine battery fitment on the i4 — what matters is the battery's physical size, capacity (kWh), and electrical spec. The eDrive35 and eDrive40 do use different capacity battery packs, so they are not straightforward swaps. Confirm the exact spec and part number against your registration with the breaker before proceeding.

The M50 is BMW's performance twin-motor variant and may share the same 83.9 kWh gross pack as the eDrive40, but differences in battery management software, cooling configuration, or mounting can affect interchangeability. Trim does not drive fitment in principle, but the performance variant's spec differences mean you should not assume a direct swap. Ask the breaker to check the part number and spec against your specific registration.

Focus on the gross capacity in kWh, the voltage, the physical dimensions, and whether the battery management system is compatible with your car's software. The i4 range includes different pack sizes across variants, so matching the spec to your exact model is more reliable than matching by year or trim name alone. Ask the breaker to confirm all of these details against your registration number.

The i4 facelift arrived for the 2024 model year, and while the battery pack architecture may be similar across that boundary, changes in BMS calibration or connector configuration could affect a direct swap. Naming the boundary is straightforward, but whether a specific pre-facelift battery crosses it successfully is something you must confirm with the breaker against your registration. Do not rely on year alone as a guarantee of fitment.

On an EV like the i4, the exact part number matters considerably — capacity, voltage, cell configuration, and BMS compatibility all need to align with your car's specification. A battery that is physically similar but of a different spec can cause charging faults, reduced range, or software errors. Always give the breaker your full registration and ask them to match the part number precisely before agreeing a purchase.