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We expect the 2025 4 Series will have about average reliability when compared to the average new car. This prediction is based on data from 2024 model and the BMW brand score.
The Reliability score is based on our latest subscriber survey of 2015 BMW 4 Series owners. The owner comments describe problems respondents experienced with this vehicle.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
"A brake cable clip broke and it was $800 to replace."
Anonymous, SC (2015 BMW 4 Series 435i 3.0-L 6 Cyl turbo)"New Ss new front rotors."
Anonymous A., NY (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)"lack of brake pad sensors on all 4 tires led to rotor damage"
Anonymous, CA (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
"The battery died two years ago and it hasn't been driven since then"
Anonymous, WA (2015 BMW 4 Series 435i Unsure)"Blowouts (2 times) due to runflat low-profile tires over potholes requiring towing and replacement of tires"
Anonymous A., NY (2015 BMW 4 Series 435i 3.0-L 6 Cyl turbo)"Trunk release failed and all new mechanism installed."
Anonymous, AB (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Windows, locks and latches, doors or sliding doors, tailgate, trunk or hatch, mirrors, seat controls (power or manual), seat belts, sunroof, convertible top, glass defect.
"The trim piece on top of the hard top buckled on driver side and finally broke."
Anonymous, SC (2015 BMW 4 Series 435i 3.0-L 6 Cyl turbo)Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
"The oils sensors failed and continued to ask me to add more oil (I wass on a trip away from home) when I took it to the dealer, I was charged $1500 to replace the sensors and "clean" the extra oil I had added!"
Anonymous A., IL (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
"Turbo hose broke. Noticed poor acceleration at lower speeds. Car is currently in the shop awaiting parts and mechanic availability."
Anonymous A., SC (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, USB ports, alarm or security system, remote engine start, heated or cooled seats, heated steering wheel, headlights, automatic headlights, automatic wipers, wireless charging pad.
"The P indicator light on top of gear shift stop lighting. Virginia safety inspection failed the car for further driving. BMW service stated the ENTIRE gear shift mechanism has to be replaced ( cannot just fix the light). BMW estimate was $1400 part and $1200 labor. Had work done at independent shop for the same part cost but labor was $600. Independent shop asked BMW for an electric card that would fix the indicator light problem without having to replace the entire gear shift mechanism. BMW would not sell/ provide this part. The car could not be driven on public roads with a failed VA safety inspection due to this one little indicator light on top of gear shifter. There is a duplicate light on the dashboard that was functional. I fault Commonwealth of Virginia for failing a car based on this minor issue AND for BMW for a car design that requires replacement of the ENTIRE gear shift mechanism for a indicator light on top of the gear shifter. What a waste of resources. The independent repair shop identified a part with the shift mechanism (electric card) that would again power this indicator light without having to replace the entire gear shift mechanism. BMW would not just sell this part. Are newer and current vehicle models have similar design flaws??"
Anonymous A., VA (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.
"inside tread of right front wheel was seriously worn. Some part of the suspension was way out of spec and had to be replaced in order to get alignment to work correctly. It was fixed, but at a high cost."
Anonymous, CA (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
Alternator, starter, hybrid battery replacement, hybrid battery related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, spark plugs and wires failure, auto stop/start.
AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
"Rear wheel sensor needed to be replaced. This sensor failure resulted in Brake, ABS, and. ABS Chassis Stabilization warnings. Car was drivable."
Anonymous, NC (2015 BMW 4 Series 435i 3.0-L 6 Cyl turbo)