1 Series F40

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F40 • 2019–2025 • Hatchback, Sedan

Engines: 3 Issues: 6 Reliability: 80%

Engine Options

Known Issues

Critical Issues

80%

Reliability Score

Facelift (LCI) – 2022

Revised headlights and tail lights
Updated iDrive with larger touchscreen
New front bumper design
Refreshed interior trim

80% – Excellent

Engines

B38B15 – 1.5L 3-Cylinder Petrol

118i • 140 hp • 220 Nm

Displacement 1.5L

Layout I3

Fuel Petrol

Transmission 8-Speed Automatic (ZF 8HP), 7-Speed DCT (DKG/M-DCT)

Modular engine architectureTwinPower TurboValvetronic IVDouble-VANOSDirect injection

Known Issues1 issue

medium Coolant Loss Moderate (~20%)

Minor coolant leaks from thermostat housing or water pump area.

Typical Mileage

60,000–100,000 km

Est. Repair Cost

€200–€500

DIY Friendly

✓ Yes

Low coolant warningSweet smell from engine bay

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B48B20 – 2.0L Turbo Petrol

128ti, M135i xDrive • 265–306 hp • 400–450 Nm

Displacement 2.0L

Layout I4

Fuel Petrol

Transmission 8-Speed Automatic (ZF 8HP)

Modular engine architectureTwinPower Turbo (twin-scroll)Valvetronic IVDirect injectionDouble-VANOS

Known Issues1 issue

medium Coolant System Weakness Occasional (~15%)

Electric water pump or thermostat may fail prematurely, particularly on early production units.

Typical Mileage

60,000–100,000 km

Est. Repair Cost

€400–€800

DIY Friendly

✗ Specialist

Overheating warningCoolant lossReduced power

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B47D20 – 2.0L Diesel

116d, 118d, 120d • 116–190 hp • 270–400 Nm

Displacement 2.0L

Layout I4

Fuel Diesel

Transmission 8-Speed Automatic (ZF 8HP)

Modular engine architectureCommon-rail solenoid injectionVariable geometry turboAluminium blockFront-mounted timing chain

Known Issues3 issues

high EGR Cooler Leak Moderate (~20%)

EGR cooler can develop internal leaks, mixing coolant into the exhaust system.

Typical Mileage

80,000–150,000 km

Est. Repair Cost

€500–€1,000

DIY Friendly

✗ Specialist

Coolant lossWhite exhaust smokeOverheating

medium Injector Seal Leak Moderate (~25%)

Copper injector seals deteriorate, causing a black tar-like residue around injectors and diesel smell.

Typical Mileage

80,000–130,000 km

Est. Repair Cost

€200–€400

DIY Friendly

✓ Yes

Diesel smellBlack residue around injectorsRough idle

medium EGR Valve Clogging Common (~30%)

EGR valve clogs with carbon, especially on cars doing mostly short trips.

Typical Mileage

80,000–130,000 km

Est. Repair Cost

€300–€600

DIY Friendly

✓ Yes

Reduced powerRough idleEML light

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Common Issues (F40-specific)

Chassis 1

low Front-Wheel-Drive Torque Steer (M135i) Common (>40%)

Being FWD-based, the M135i can exhibit torque steer under hard acceleration despite xDrive.

Typical Mileage

N/A – by design

Est. Repair Cost

N/A

Wear Items

B38B15 – Wear Items

118i

Spark Plugs Every 60,000 km

NewReplace

Replacement Cost€60–€100

Wear Factor55%

B48B20 – Wear Items

128ti, M135i xDrive

Spark Plugs Every 60,000 km

NewReplace

Replacement Cost€80–€150

Wear Factor50%

Brake Pads (Front) 30,000–50,000 km

NewReplace

Replacement Cost€150–€400

Wear Factor55%

B47D20 – Wear Items

116d, 118d, 120d

DPF (Diesel Particulate Filter) 150,000–250,000 km

NewReplace

Replacement Cost€800–€2,000

Wear Factor40%

Glow Plugs 80,000–120,000 km

NewReplace

Replacement Cost€100–€250

Wear Factor45%

All Variants

Complete list of model variants for F40

Model	Engine	Displacement	Layout	Power	Torque	Transmission
118i	B38B15	1.5L	I3	140 hp	220 Nm	Automatic, Dct
128ti	B48B20	2.0L	I4	265–306 hp	400–450 Nm	Automatic
M135i xDrive	B48B20	2.0L	I4	265–306 hp	400–450 Nm	Automatic
116d	B47D20	2.0L	I4	116–190 hp	270–400 Nm	Automatic
118d	B47D20	2.0L	I4	116–190 hp	270–400 Nm	Automatic
120d	B47D20	2.0L	I4	116–190 hp	270–400 Nm	Automatic