BMW 125i (F52)
BMW 1 series 2017 2.0 petrol description
Sedan BMW 125i has been produced from 2017 to 2019. It has four-cylinder petrol engine with displacement of 2.0 litres, which produces power of 231 horsepower on 4750 rpm - this is the most powerfull BMW 1 sērija 2017 version and torque 350 Nm (Newton metres) on 1250 revolutions per minute.
This 4-cylinder 16-valve engine camshaft is driven by chain (What is an engine chain and belt? ). Engine has fuel injection system and MHI TD04LR6W turbine. The engine meets the Euro 6 emissions standard. Engine lifespan (mileage before major repairs or overhaul) can last from 200 up to 340 thousand kilometres. Note that engine life can be longer or shorter depending on maintenance.
More engine specs
Compared to their predecessors, B48 engines are more robust and less prone to major failures. They are well-suited for chip tuning, which can noticeably enhance ...
This BMW 1 series 2.0 engine oil type is 0W-30, 5W-30, 0W-20 and oil capacity is 5.3 litres.
BMW 125i has front wheel drive (FWD) and automatic gearbox with 8 gears.
BMW 125i accelerates to speed 100 kilometres per hour in 6.8 seconds. The maximum speed of this car is 250 km/h.
BMW 125i fuel consumption is 6.4 litres per 100km in combined city/highway mode (15.6 km/l). Fuel tank capacity is 50 litres or 13.21 gallons, which gives a mileage up to 780 kilometers without refueling in urban cycle.
BMW 1 series safety
During safety testing BMW 1 series has obtained 5 stars from five, which means very high safety level.
Adults (driver and passenger) safety of BMW 1 series is evaluated with very good rate 83 from 100, children safety: very good mark - 87 from 100, for pedestrian protection BMW 1 series got 76 points from 100.
BMW 1 series safety equipment has been rated as good - 72 percents from 100.
BMW 125i technical data
| Model: | BMW 125i | ||
|---|---|---|---|
| Body style: | Sedan | ||
| Production period: | 2017. January ... 2019. December | ||
| Engine: | 1998 cm3 Petrol, 4 cylinders | CO2 emissions: | no data |
| Power: | 231 HP ON 4750 RPM | Torque: | 350 NM ON 1250 RPM |
| Gearbox: | Automatic gearbox (8 gears) | Drive type: | Front wheel drive (FWD) |
| Top speed: | 250 km/h | Acceleration 0-100 km/h: | 6.8 seconds |
| Fuel consumption (l/100km): | 6.4 (combined) | ||
| Fuel tank capacity: | 50 litres (13.2 gallons) | ||
| Car dimensions: | 4.46m (length) 1.80m (width) 1.45m (height) | ||
BMW 125i engine B48A20O0
Engine reliability and common problems:
Compared to their predecessors, B48 engines are more robust and less prone to major failures. They are well-suited for chip tuning, which can noticeably enhance performance and responsiveness without compromising reliability.Oil consumption, while significantly improved over earlier engines, may still appear closer to 100,000 km, often due to hardened valve stem seals. Another common issue is unstable idle or fault codes related to a lean mixture, typically caused by a faulty fuel tank ventilation valve — a relatively inexpensive part.
The cooling system is a known weak point. Coolant leaks may result from seal failures, cracks, thermostat or pump malfunctions, or general contamination. Symptoms include engine overheating, white smoke from the exhaust, poor coolant quality, visible leaks, warnings on the dashboard, and elevated temperature readings.
These engines are sensitive to fuel quality and oil change intervals. Cutting corners on maintenance often leads to costly repairs or even engine replacement.
At higher mileage, weaknesses may also include chain tensioners, the VANOS and Valvetronic systems, high-pressure fuel pumps, throttle actuators, and the turbocharger.
Overall, the B48 is a reliable and practical engine without inherent flaws. The mentioned issues tend to appear only under certain conditions and are not universal across all units.
Overall, this engine can last around 200,000 to 340,000 km if properly maintained, using the correct quality oil and fuel, and carrying out regular checks and maintenance.
The engine has hydraulic valve tappets (lifters), which provide quieter operation and do not require periodic adjustment, but are more complex in design and can cause serious engine damage in the event of failure.
| Engine displacement | 1998 cm3 |
|---|---|
| Number of cylinders | 4 |
| Bore (cylinder diameter) | 82 mm |
| Stroke length (piston move) | 94.6 mm |
| Compression ratio | 10.2 : 1 |
| Camshaft drive | Timing chain Chain motors are considered more reliable, chain replacement usually is required less often than a timing belt, but they are often louder and vibrate more. More service info |
| Fuel system | Injection |
| BMW 125i oil type | 0W-30, 5W-30, 0W-20 |
| Oil capacity | 5.3 litres (5.6 quarts) More service info |
| Power | 231 HP ON 4750 RPM |
| Torque | 350 NM ON 1250 RPM |
| Start of production (year) | 2014 |
| Duration of production | 11 years |
| Engine also used on | BMW X1 BMW 2 sērija |
Generally, the use of an engine in several models and its long production run is an indication of the quality of the engine and the success of its design. |
Most often compared to
All BMW 1 series sedan [2017 modifications
| Modification | Engine | Power | Consumption |
|---|---|---|---|
| BMW 118i Jan 2017 — Dec 2019 | 1.5 Petrol | 136 HP | 5.9 l/100km |
|
BMW 120i
Most fuel efficient version |
1.5 Petrol | 140 HP | 5.4 l/100km |
| BMW 120i Jan 2017 — Dec 2019 | 2.0 Petrol | 192 HP | 6.4 l/100km |
| BMW 125i | 2.0 Petrol | 192 HP | 5.8 l/100km |
|
BMW 125i
Jan 2017 — Dec 2019 Most dynamic version - 100 km/h in 6.8 seconds |
2.0 Petrol | 231 HP | 6.4 l/100km |