BMW M135i explained: the four-cylinder all-wheel drive hot hatch
The BMW M135i is a compact hot hatch with a four-cylinder turbo and xDrive. The engine, all-wheel drive, limited-slip differential, how it differs from the M140i, driving feel and buying tips.
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The BMW M135i is the fastest version of the third-generation 1 Series. Launched in 2019, the F40 M135i xDrive replaced the six-cylinder, rear-wheel drive M140i with a different recipe: a turbocharged four-cylinder engine and all-wheel drive.
The change divided enthusiasts, but the M135i is quick, practical and very capable in all weather. In this article we explain the engine, the xDrive system and limited-slip differential, how it compares with the M140i, the driving experience and what to check when buying one.
A new platform
The third-generation 1 Series, known as the F40, moved to a front-wheel drive based platform shared with other compact BMW and MINI models. This allowed more interior space, especially in the rear seats and boot.
For the top model, BMW combined this platform with xDrive all-wheel drive. The result was the M135i xDrive, an M Performance model designed to compete with other fast compact hatchbacks. Our article on BMW M vs M Performance vs M Sport explains where M Performance models sit in the range.
The BMW M135i engine
The BMW M135i uses a 2.0-litre four-cylinder turbo engine from BMW's modular engine family, producing around 306 hp. It is BMW's most powerful four-cylinder of its time in a production model.
The engine delivers strong torque across a wide range of engine speeds, quick response and good efficiency for its performance. It is combined with an eight-speed Steptronic automatic gearbox with paddle shifters. Our article on BMW turbo problems explains how to look after a turbocharged engine.
xDrive and the limited-slip differential
The M135i uses xDrive all-wheel drive. Under normal conditions, most of the power goes to the front wheels, but the system can send a large share to the rear axle when needed for traction or agility.
A mechanical limited-slip differential on the front axle helps put the power down out of corners and reduces understeer. This combination makes the car very quick on wet or slippery roads. Our article on M xDrive explains the more advanced all-wheel drive used on full M cars.
M135i vs M140i
The comparison with the previous M140i is often discussed:
- Engine: the M140i used a 3.0-litre straight-six; the M135i uses a 2.0-litre four-cylinder.
- Drive: the M140i was mostly rear-wheel drive; the M135i is all-wheel drive.
- Character: the M140i is more playful and has a richer sound; the M135i is more secure and easier to drive fast in poor conditions.
- Practicality: the M135i has more interior space.
Our M140i buying guide explains the older car in detail. Many enthusiasts prefer the M140i for its engine and balance, while daily drivers often prefer the M135i for its traction and space.
Driving feel
The M135i is very fast in real-world conditions. It accelerates strongly, stays composed on bumpy roads and feels secure in rain and cold weather. The steering is quick, and the car changes direction eagerly.
It is less adjustable than a rear-wheel drive car, which some enthusiasts miss. But for many drivers, its predictable handling and grip make it easier to enjoy safely.
The engine sound is enhanced inside the cabin in sporty modes. Our article on BMW Active Sound Design explains how this works and why opinions about it differ.
Practicality and equipment
As a five-door hatchback, the M135i is easy to live with. It offers a usable rear seat, a practical boot and modern equipment, including digital displays and driver assistance systems.
Our article on BMW Apple CarPlay and Android Auto explains smartphone integration, which is available on most of these cars.
Buying tips
When buying a used M135i:
- Check the service history, including oil changes and gearbox fluid where applicable.
- Look at tyres and brakes, which wear faster on cars driven hard.
- Test the gearbox for smooth shifts.
- Ask about modifications, because the engine is often tuned.
- Check the equipment, such as adaptive suspension and the Head-Up Display. Our article on the BMW Head-Up Display explains this option.
Our complete checklist for buying a used BMW covers the other checks.
The next generation
A later generation of the 1 Series continued the idea of a fast all-wheel drive hatchback with a turbocharged four-cylinder, under a slightly changed name. The F40 M135i remains a strong used buy for drivers who want performance, traction and practicality in a compact car.
For buyers comparing it with other fast compact cars, the M135i stands out for its build quality, its interior and the confidence of all-wheel drive in winter. With suitable winter tyres, it is one of the most usable fast cars for cold climates. Our article on BMW winter tyres explains how to choose tyres for the cold season.
BMW M135i (F40) key facts
| Item | Details |
|---|---|
| Internal code | F40 |
| Launched | 2019 |
| Engine | 2.0-litre four-cylinder turbo |
| Power | Around 306 hp |
| Gearbox | 8-speed Steptronic automatic |
| Drive | xDrive with front limited-slip differential |
| Predecessor | M140i with straight-six and rear-wheel drive |
Frequently asked questions
Is the BMW M135i rear-wheel drive?
No. The F40 M135i uses xDrive all-wheel drive with a front-biased setup.
What engine is in the BMW M135i?
A 2.0-litre four-cylinder turbo engine with around 306 hp.
Is the M135i better than the M140i?
It is more practical and better in poor weather, but many enthusiasts prefer the M140i for its straight-six and rear-wheel drive.
Does the M135i have a manual gearbox?
No. It uses an eight-speed Steptronic automatic.
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