The 2018 3 Series is less reliable than other cars from the same model year.
The Reliability score is based on our latest subscriber survey of 2018 BMW 3 Series owners. The owner comments describe problems respondents experienced with this vehicle.
Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
"Back up battery for the emergency contact system failed"
Anonymous, VA (2018 BMW 3 Series 320i 2.0-L 4 Cyl turbo)AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
"Failure; replaced AC compressor $700"
Anonymous, IN (2018 BMW 3 Series 340i xDrive 3.0-L 6 Cyl turbo)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.
"#6 cylinder leaked fuel and fouled out"
Anonymous, CA (2018 BMW 3 Series 340i 3.0-L 6 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.
""Leaking suspension, need to replace the shocks""
Anonymous, QC (2018 BMW 3 Series 330i xDrive 2.0-L 4 Cyl turbo)Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
"Shift cable caught in under carriage causing gear change issues"
Anonymous, CA (2018 BMW 3 Series 340i 3.0-L 6 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.
"The fuel injector seal had to be replaced due to surging. Took a while to find the culprit."
Anonymous, CA (2018 BMW 3 Series 340i 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.
"Breaks make squeaking / grinding sound. Probably because of some rust and need to be maintained / cleaned / buffed"
Anonymous, QC (2018 BMW 3 Series 330i xDrive 2.0-L 4 Cyl turbo)Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
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.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
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.
"GPS worked as described for three years of ownership. BMW notified me due to the model year (2018) GPS was not supported. My selling BMW dealer was no help so that function is dead."
Anonymous, CA (2018 BMW 3 Series 330i 2.0-L 4 Cyl turbo)