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The 2015 4 Series has about average reliability compared to other cars from the same model year.
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.
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.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
"Failed thermostat unit was discovered during service after engine light was on for about 2 weeks. Took about 2-3 more weeks to get it repaired due to parts and maintenance availability. Also, replaced the rear brakes a the same time."
Anonymous, (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.
"Water into the top, didn't drain; weep holes plugged."
Anonymous, OR (2015 BMW 4 Series 435i 3.0-L 6 Cyl turbo)Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
""leaking coolant, replaced radiator""
Anonymous, (2015 BMW 4 Series 435i 3.0-L 6 Cyl turbo)Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
"The brakes squeak immediately after starting to drive and continue for the next couple of miles"
Anonymous, FL (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
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.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
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.
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
""The suspension seems somewhat fragile. Maybe because we have run-flat tires. We have run-flat tires because it's hardtop convertible and so we have no space for a spare tire. We had to replace the suspension components, which were expensive. It seems this car is prone to having suspension problems if there is the occasional pothole. Much more so than our other car, which is a Honda Accord.""
Anonymous, TN (2015 BMW 4 Series 428i 2.0-L 4 Cyl turbo)