X4 M40i G02
2019 to 2025 · reliability 87 to 94- Oil pump failure (B58, 2020 to 2021 cars)High$2,600
- Oil filter housing and valve cover gasket leaks (B58)Medium$1,500
- Coolant loss (B58)Medium$500
Problems by generation
BMW X4 M40i problems by generation
The known problems on all 2 X4 M40i generations in our guide (F26 and G02): what a fix costs, how each one scores on reliability, and which model years to skip.
Every X4 M40i generation at a glance
| Generation | Reliability | Costliest known repair | Best year |
|---|---|---|---|
| X4 M40i G022019 to 2025 | 87 to 94Excellent | Oil pump failure$2,600 | 2025Score 63 |
| X4 M40i F262016 to 2018 | 80 to 81Strong | Water pump and thermostat failure$1,000 | 2018Score 55 |
Reliability is out of 100, for the range of a generation's model years: its engine, its own known problems and their bills, parts and service costs, and age. Repair figures are the guides' estimates for an independent shop, not quotes. How the scores work
The worst known problems on each X4 M40i
X4 M40i F26
2016 to 2018 · reliability 80 to 81- Water pump and thermostat failure (N55)Medium$1,000
- Oil leaks at the valve cover and oil filter housing (N55)Medium$750
- VANOS solenoid faults (N55)Low$680
Worst first: severity, then the repair estimate. Recalls are left out, since a BMW dealer fixes them free.
Which X4 M40i years to skip
| Generation | Best year | Weaker years, and why |
|---|---|---|
| X4 M40i G022019 to 2025 | 2025 (63) | 2019 (Guide Score 63) score close to the best, but check for pCV diaphragm wear. 2020 and 2021 (Guide Score 62) score close to the best, but check for oil pump failure. |
| X4 M40i F262016 to 2018 | 2018 (55) | None: no year is held back by a specific problem. |
Most of the gap between years is age. A year is listed when the score charges it for something specific: a different engine, a problem that hit only some years, or a gearbox that came later. The same list for every car is on the best and worst years.
Before you choose
Tip
A well-kept car from a weaker generation can be a better buy than a neglected one from the best. Each guide has the full problem list with how to check for each, and Score a listing rates one car for sale.