The 2021 3 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 2021 BMW 3 Series owners. The owner comments describe problems respondents experienced with this vehicle.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
""run flat tire blew out. they're extremely expensive, more so if you have front or all wheel drive and need to replace two of them when one goes.""
Anonymous, CT (2021 BMW 3 Series 330i xDrive 2.0-L 4 Cyl turbo)AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
"Unsure"
Anonymous, BC (2021 BMW 3 Series M340i 3.0-L 6 Cyl turbo)"from invoice: "Heat management module leaking coolant. Replaced heat management nodule with hardware and all seals on oil filter housing and intake manifold." Also noted "Replaced faulty AC line ...charge refrigerant into the system.""
Anonymous, NJ (2021 BMW 3 Series 330i 2.0-L 4 Cyl turbo)Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
"Only symptom I could see was that it couldn't update the mileage until the next service. There must have been more. They replaced it under the warranty."
Anonymous, FL (2021 BMW 3 Series 330i 2.0-L 4 Cyl turbo)Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
"Just after the warrantee was over, there's a $5000 repair to the coolant system. It's a cracked component that is part metal and part plastic."
Anonymous, CA (2021 BMW 3 Series 330i Unsure)Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
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.
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.
Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
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.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
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.
Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
"1. Unable to update software 2. Windshield washer system minimally functional"
Anonymous A., TX (2021 BMW 3 Series 330i 2.0-L 4 Cyl turbo)