English
Lietuvių
Latviešu
Eesti
Polski
Русский
Українська
Deutsch
Nederlands
Čeština
Slovenčina
Svenska
Norsk
Dansk
Suomi
BMW X4: F26 and G02 generations, engines, and trims
The BMW X4 is a mid-size coupe-SUV built on the BMW X3 platform. We take a look at how the F26 and G02 generations differ, which engines are most common on the used market, how trim levels vary, and what you need to check before buying.
The X4 in brief
The X4 hit the market in 2014 as a sportier version of the X3 with a sloping, coupe-like rear end. Its engineering, engines, and most of the interior are shared with the X3, though the X4 sits lower and offers slightly less space in the rear seats and boot.
Almost all X4s sold in Europe feature xDrive all-wheel drive and an automatic transmission. In Lithuania, models powered by 2.0-litre and 3.0-litre diesel engines are by far the most common.
F26 vs. G02 — the differences
The first-generation F26 (2014–2018) is based on the X3 F25 platform. It is the cheapest way to get into an X4, but most examples now have relatively high mileage, making mechanical condition and service history paramount.
The second-generation G02 (from 2018 onwards) is built on the X3 G01 platform: it is larger and more spacious, with a more modern interior and a wider array of driver-assistance systems. Facelifted models from 2021 received revised lighting and bumpers, a larger infotainment screen, and 48V mild-hybrid technology for the diesel engines.
On the used market, the G02 generation is the most popular and generally recommended choice—particularly 2021 and later cars.
Engines and transmissions
The most common powerplants are the xDrive20d (around 190 hp) and xDrive30d (roughly 260–290 hp, depending on the model year) diesels. Petrol options include the 2.0-litre xDrive20i and xDrive30i, while the high-performance range is headed by the six-cylinder M40i and M40d.
The G02 generation also spawned the X4 M and X4 M Competition, packing a 3.0-litre engine with around 480–510 hp. All versions are paired with an 8-speed Steptronic automatic transmission, which is considered reliable provided the fluid has been changed on schedule.
What to look out for when buying a used X4
Early F26 xDrive20d models (roughly up to 2015) feature the N47 diesel engine, which belongs to a family notorious for timing chain issues—listen closely for any rattling on a cold start. On diesel variants, check the state of the DPF and EGR systems, and verify whether the manufacturer's EGR cooler recall has been carried out.
While driving slowly on full lock, listen out for any jerking or shuddering—this can indicate wear in the xDrive transfer case. Check the engine for oil leaks, particularly around the valve cover and oil filter housing.
Verify mileage against MOT and service records, and inspect the bodywork for signs of resprayed panels. On cars fitted with large alloy wheels, check for kerb damage or buckles, and ensure the tyres are wearing evenly.
Trim levels
Names and equipment vary depending on the market and model year; below are the trims most commonly found in Europe.
Bazinė
F26, G02The entry-level version with essential equipment.
- Typically 17–18-inch alloy wheels
- Automatic climate control
- Frequently includes parking sensors
xLine
F26, G02A more elegant look with SUV-style design touches.
- Matt aluminium exterior trim
- Unique bumpers and alloy wheels
- Frequently features leather upholstery
M Sport
F26, G02The most popular trim level on the used market.
- M Sport bumpers and 19–20-inch alloy wheels
- Sports seats and an M steering wheel
- Sport suspension
M40i / M40d
F26, G02High-performance six-cylinder M Performance models.
- 3.0-litre petrol (M40i) or diesel (M40d, G02 only) engine
- Sports suspension and upgraded brakes
- Frequently equipped with Adaptive M suspension
X4 M
G02The ultimate, sportiest X4 derivative.
- 3.0-litre engine with approx. 480–510 hp
- M-tuned chassis and brakes
- M sports seats
G02 generation trim comparison
| xLine | M Sport | M40i / M40d | X4 M | |
|---|---|---|---|---|
| Best suited for | Comfort and elegance | Sporty styling | High-speed driving | Driving pleasure |
| Alloy wheels (typical) | 18–19-inch | 19–20-inch | 20–21-inch | 21 in. |
| Interior | Standard or leather | Sport seats | Sport seats, M Performance trim | M sports seats |
| Engine | 20i, 30i, 20d, 30d | 20i, 30i, 20d, 30d | 3.0-litre, six-cylinder | 3.0-litre, around 480–510 hp |
| Used market price (relative) | € | €€ | €€€ | €€€ |
For most buyers, the best choice is the M Sport with the xDrive20d or xDrive30d engine. The M40i, M40d and X4 M are only worth considering if performance is a priority, as they are significantly more expensive to run.
Pros
- Sporty coupé-like styling
- All-wheel drive across all versions
- Powerful and efficient diesel engines
- Precise steering, as is typical for BMW
Cons
- Smaller boot and less rear headroom than the X3
- High maintenance and repair costs
- Commands a higher price on the used market than an X3 of the same age
Frequently asked questions
How does the BMW X4 differ from the X3?
The X4 shares the same engines and mechanicals as the X3, but features a more sloping, coupé-like rear end. This gives it a sportier look, though rear headroom and boot space suffer as a result. If practicality is your top priority, go for the X3.
Which X4 engine is the best buy on the used market?
For most buyers, the sweet spot is the xDrive20d or xDrive30d. The six-cylinder 30d runs more smoothly and handles towing with ease, while the 20d is the more fuel-efficient option.
Which X4 generation should you choose?
If your budget allows, opt for the G02 generation—ideally a facelifted model from 2021 onwards. The older F26 X4 is cheaper to buy, but it is older and usually comes with high mileage, making a thorough pre-purchase inspection essential.
Is the X4 suitable for a family?
There is enough room for two children, though taller passengers in the back might find headroom tight. For families who frequently travel with plenty of luggage, the X3 will prove much more practical.
Updated 2026-10-09 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
