X6 E71 vs FX / QX70 S51 (FX / QX70): which is better?
BMW X6 E71 (2008–2014) vs Infiniti FX / QX70 S51 (FX / QX70) (2008–2017): specs, fuel economy, tax and common problems.
BMW X6 E71
Infiniti FX / QX70 S51 (FX / QX70)Specifications
| BMW X6 E71 | Infiniti FX / QX70 S51 (FX / QX70) | |
|---|---|---|
| Production years | 2008–2014 | 2008–2017 |
| Body | crossover SUV | crossover SUV |
| Fuel | petrol | petrol |
| Engines | 3.0 Turbo (35i) | 3.5 V6 (FX35 / QX70) |
| Power, up to | 306 hp | 307 hp |
| Torque, up to | 400 Nm | 355 Nm |
| Gearbox | automatic | automatic |
| Drive | all-wheel drive | all-wheel drive |
| Length | 4 877 mm | 4 865 mm |
| Width | 1 983 mm | 1 925 mm |
| Height | 1 690 mm | 1 680 mm |
| Wheelbase | 2 933 mm | 2 885 mm |
| Fuel tank | 85 L | 90 L |
| KZ tax 2026 (car under 10 years) | ≈ 42 425 ₸ | ≈ 68 375 ₸ |
The better value is highlighted in green.
Pros, cons and common problems
BMW X6 E71
Pros
- Powerful versions: up to 306 hp
- All-wheel-drive versions available
- Conventional automatic, no robotized gearbox or CVT
- Large fuel tank: 85 L
Cons
- Engine BMW N54/N55 (3.0 Turbo): oil leaks from the filter housing and oil cooler
- Gearbox ZF 5HP/6HP: bushing and mechatronics wear
Engine (BMW N54/N55 (3.0 Turbo)): oil leaks from the filter housing and heat exchanger; wastegate rattle; electric water pump failure; on the N54 — injectors and high-pressure fuel pump.
Gearbox (ZF 5HP/6HP): bushing and mechatronic wear; shift shocks.
Infiniti FX / QX70 S51 (FX / QX70)
Pros
- Gearbox Jatco RE (Nissan/Infiniti automatic): generally reliable
- Powerful versions: up to 307 hp
- All-wheel-drive versions available
- Large fuel tank: 90 L
Cons
- Engine Nissan VQ (V6): oil consumption on some engines
- Gearbox Jatco RE (Nissan/Infiniti automatic): at high mileage, shift shocks and valve body wear
Engine (Nissan VQ (V6)): oil consumption on some engines; catalytic converter breakdown and cylinder scoring; valve cover leaks.
Gearbox (Jatco RE (Nissan/Infiniti automatic)): generally reliable; at high mileage — shocks and valve body wear.
Which one to choose
- X6 E71 — if you care more about: torque, wheelbase, kz tax 2026.
- FX / QX70 S51 (FX / QX70) — if you care more about: power, fuel tank.
The condition of a specific car matters more than the model: check the service history and get the engine and gearbox inspected before buying.
FAQ
Which is more powerful: X6 E71 or FX / QX70 S51 (FX / QX70)?
X6 E71: up to 306 hp, FX / QX70 S51 (FX / QX70): up to 307 hp.
What is the vehicle tax in Kazakhstan?
For 2026, for a car under 10 years old: X6 E71 — about 42 425 ₸, FX / QX70 S51 (FX / QX70) — about 68 375 ₸ (base engine). A 0.7 factor applies to cars aged 10–20 years and 0.5 to cars over 20.