NHTSA lists 10 safety recalls and 110 owner complaints for the 2020 BMW 3 Series. Most complaints involve engine (61) and electrical system (26). The EPA rates it 25–30 mpg combined.
BMW of North America, LLC is recalling certain 2019-2020 X5, X7, 2020 3 Series Sedan, X6, 2020-2021 7 Series Sedan, 2020 8 Series Convertible, 8 Series Coupe, and 2020 8 Series Gran Coupe vehicles. Please see the recall report for the complete list of models. In the event the starter motor fails, repeated attempts to start the vehicle can cause the starter motor to overheat from an electrical overload.
BMW of North America, LLC (BMW) is recalling certain 2019-2022 330i, 330i xDrive, M340i, 2022 430i Coupe, 2021-2022 430i, M440i Convertible, and 2020-2022 228i xDrive Gran Coupe vehicles. The receiver audio module control unit software may fail to properly generate audible seat belt warnings to the driver to fasten their seat belt. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
BMW of North America, LLC (BMW) is recalling certain 2019-2021 330i, 330i xDrive, M340i xDrive, 2020-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, 2021 X3 xDrive30e, X4 xDrive30i, and X4M vehicles. The seat frame may not have been welded properly to the seat rails.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“I am reporting a safety concern involving BMW vehicles equipped with the B58 Technical Update (B58TU) engine, commonly found in model years 2019–2021. These vehicles utilize a variable-displacement engine oil pump containing an internal thermoplastic adjusting component responsible for regulating oil pressure. Field failures are increasingly being reported in which this internal component fractures, resulting in sudden loss or instability of engine oil pressure. The failure frequently occurs during cold-start operation in low ambient temperatures. When the component fails, oil pressure regulation becomes erratic or is lost entirely. In many cases, drivers receive little or no actionable warning prior to engine damage or vehicle disablement. Reported precursor symptoms include inability to electronically measure engine oil level, abnormal oil pressure behavior, or sudden drivetrain malfunction warnings. Failures may rapidly progress to engine shutdown or severe mechanical damage caused by oil starvation. Loss of lubrication can cause the vehicle to become disabled without warning while driving or shortly after startup. This creates a safety hazard, particularly…”
“Several months ago, my digital cluster on my 2020 330i blacked out briefly and came back on. The other day, after temporarily disconnecting the batter and correctly reconnecting, the digital cluster and driver assist items all failed. Because of this failure, I no longer have access to my speedometer, engine temperature, or engine lights in the event that something needs immediate attention. Not having the speedometer requires me to check my speed using a GPS device would causes me to divert my attention from the road which is a hazard to pedestrians and drivers alike. I also do not have the driver assist items which can result in an accident which would injure both myself and other drivers. The cluster has not returned to being functional, which was confirmed by the dealership after completing a full ISTA troubleshooting tree. There were no warnings that this would happen, it just immediately died after a power cycle of the battery.”
“The contact owned a 2020 BMW 330i. The contact stated that while accelerating from a complete stop and making a left turn, another vehicle, trying to beat the light and driving 60 MPH, crashed into the driver's side of the vehicle. The contact was trapped because the front driver's side door failed to open. The air bags failed to deploy. The police officers delayed their arrival, and a police report was not filed. The contact was in shock. The contact drove to the residence and was able to exit the vehicle through the front passenger's side door. The contact sustained C8-T1 nerve injuries, spinal injuries, and underwent surgery, developed myelopathy, severe PTSD, severe whiplash, and the contact sustained right eye bruises after hitting her eye against the steering wheel. The T1 neck screw that was previously installed in the contact's neck had backed out due to the impact and was replaced. The contact was informed that she nearly sustained paralysis due to the crash impact. The vehicle was taken to an autobody repair shop, and the vehicle was totaled by the insurance company. The dealer was not contacted. The manufacturer was notified of the failure and sent…”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| 330i Auto (S8), 4 cyl, 2.0 L, Turbo · Rear-Wheel Drive | 26 | 36 | 30 | $2,650 | 299 |
| 330i xDrive Auto (S8), 4 cyl, 2.0 L, Turbo · All-Wheel Drive | 25 | 34 | 28 | $2,850 | 313 |
| M340i Auto (S8), 6 cyl, 3.0 L, Turbo · Rear-Wheel Drive | 22 | 30 | 25 | $3,200 | 353 |
| M340i xDrive Auto (S8), 6 cyl, 3.0 L, Turbo · All-Wheel Drive | 22 | 30 | 25 | $3,200 | 356 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
10 safety recalls as of Nov 3, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 110 complaints with NHTSA. The most-cited components are engine (61), electrical system (26), air bags (5). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2020 BMW 3 Series at 25–30 mpg combined, depending on engine and drivetrain (4 versions rated).