2020 Bmw M340i Problems
Used BMW M340I shoppers should review this model-year complaint and recall record before making an offer. Based on 47 real NHTSA owner complaints, with Engine Problems the most reported area.
Before you buy
This 2020 Bmw M340i has 47 NHTSA complaints — top issue: Engine Problems.
A model-year pattern isn't the car in front of you. Check this exact VIN for accidents, open recalls, odometer rollback, and salvage titles.
Free preview · Full report from $12.95.
2020 Bmw M340i Fuel Economy
✓ EPA Official DataEPA-rated fuel economy across 2 2020 Bmw M340i trim configurations. The median figure is shown; range reflects all available trims.
Source: EPA FuelEconomy.gov. Figures reflect EPA lab testing; real-world results vary by driving style, load, and conditions. 2 trims analysed.
Based on NHTSA complaint data, the 2020 Bmw M340i has 47 owner complaints, 0 crash-related complaints, and 10 recall campaigns on record. The most frequently reported component is Engine Problems. NHTSA reliability signal: Good Record.
- Make
- Bmw
- Model
- M340i
- Model year
- 2020
- NHTSA owner complaints
- 47
- Crash-related complaints
- 0
- Safety recall campaigns
- 10
- Top reported component
- Engine Problems
- Reliability signal
- Good Record
- EPA MPG combined
- 25
- EPA MPG city / highway
- 22 / 30
- Fuel type
- Premium Gasoline
Common problems
Most common 2020 Bmw M340i problems
Top owner-reported complaint areas and where they often appear.
Engine Problems
Uncategorized Issues
Electrical Faults
Complaint patterns center on Engine Problems, Uncategorized Issues, Electrical Faults. Use these as a pre-purchase inspection guide, then verify recall and damage history on the specific VIN.
Buyer verdict
Should you buy a used 2020 Bmw M340i?
This BMW M340I year shows a meaningful number of reported issues, so buyers should only proceed after a careful records review and inspection.
Model-year complaint trends can reveal recurring trouble spots before you spend money on inspections, financing, or repairs.
May Suit
This year may suit buyers who prioritize complete maintenance records and pass a pre-purchase inspection.
May Want to Avoid
Buyers who want a lower-risk ownership profile may prefer comparing nearby model years before committing.
Pre-purchase
What to check before buying a used 2020 Bmw M340i
Inspection Focus
- Inspect the most frequently reported complaint components on this model year
- Confirm recall repairs were completed and documented
- Check for accident damage, title brands, and mileage inconsistencies on the exact VIN
Before You Close the Deal
- Run a VIN check on the specific vehicle you are considering
- Verify all open recalls are completed at nhtsa.gov/recalls
- Request service records for the most-reported complaint components
- Have a certified mechanic inspect the vehicle before purchase
Check the exact car
Shortlist with model-year data. Decide with the exact VIN.
Before buying a used 2020 Bmw M340i, run a VIN history report to verify accidents, title brands, odometer records, theft checks, and open recalls for the exact vehicle.
AI verdict
What the complaint data suggests
Editorial interpretation of NHTSA public complaint data. Source: nhtsa.gov. Complaints are owner-submitted and do not confirm a defect. Methodology
The BMW M340I has 47 NHTSA complaints and 10 recalls on record. This data reflects owner-reported issues submitted to the National Highway Traffic Safety Administration.
Recall context: 10 recall campaigns are on record, so recall completion status should be confirmed on the exact VIN before purchase.
- 47 total complaints filed with NHTSA
- 10 federal recall campaigns
- No crash-related complaints on record
- Review NHTSA complaint history for the most-reported components
- Check recall completion status at nhtsa.gov/recalls
- Verify service records for frequently complained components
Full breakdown
All 2020 Bmw M340i complaints by category
Every owner-reported complaint category filed with NHTSA for the 2020 Bmw M340i. Use this as a pre-purchase inspection checklist.
| Component | Complaints | Crashes | Fires | Avg Mileage | Volume |
|---|---|---|---|---|---|
| Engine Problems | 36 | — | — | — | |
| Uncategorized Issues | 9 | — | — | — | |
| Electrical Faults | 6 | — | — | — | |
| Fuel/Propulsion System | 3 | — | — | — | |
| Transmission / Drivetrain | 2 | — | — | — | |
| Tire Issues | 2 | — | — | — | |
| Wheel Issues | 1 | — | — | — | |
| Brake System | 1 | — | — | — |
Source: NHTSA Complaints Database. Complaint counts may exceed total complaints because one report can span multiple categories.
In their words
Real owner complaints
Read what owners actually reported to NHTSA for the 2020 Bmw M340i. Type a keyword (e.g. “transmission”, “stalling”, “brakes”) to filter.
Engine oil pump is failing. Early production 2019-2020 model years are made of plastic which can crack and break resulting in engine failure while driving. This is a well documented issue regarding the BMW B58 Engine (2nd Generation) They have since updated the engine oil pump pa…
Component: Front differential / xDrive drivetrain system. Vehicle is available for inspection upon request. Description: My 2020 BMW M340i xDrive has exhibited a persistent whining noise from the front drivetrain since approximately 38,000 miles. The noise varies with speed and …
Safety Hazard: Oil Pump Failure Leading to Sudden Engine Stall (BMW B58TU engines) Description of Defect: The oil pump module in the 2020 BMW M340i (G20) contains internal plastic components that are prone to thermal degradation and premature failure. These plastic parts can cra…
I’ve been doing research for this particular issue on the 2020 bmw m340i (B58 engine). There is a plastic housing on the oil pump that seems to completely collapse due to consistent heat cycles (starting the vehicle). As far as I know that common symptoms include not being able t…
Oil pump failure
Engine failed suddenly while driving on a highway. While driving at highway speed, warning lights and messages appeared indicating oil pressure is low and to turn off the engine immediately. The vehicle was towed to the shop where it was discovered that the oil pump, which was ma…
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 responsi…
EXHIBITING SIGNS OF NOT BEING ABLE TO READ OIL LEVELS WHICH IS A POTENTIAL SIGN OF OIL PUMP FAILURE DUE TO PLASTIC INTERNAL COMPONENTS THAT HAS OCCURED IN 2020 MODELS.
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 responsi…
Oil pump in B58 BMW engines 2019-2022 has been a major safety concern that results in catastrophic failure while driving the vehicle. All because of BMW using a plastic component and quietly changed it, meanwhile hundreds of people had a major oil leak and engine seizures on hwy …
Oil pump is made of plastic causing it to fail after a certain time and can lead to a total engine loss if not swapped out with BMW’s updated oil pump. They are aware of the issue but neglecting to handle the problem.
Oil Pump Failed its common issue on them but no recall
The ignition start is not clean and delayed. There is already a recall 25V-644. There is "No remedy available" for this model per inquiry with local BMW dealer in Buffalo NY 14221 made 3 weeks ago. I am fearful of an electrical fire from overheating. I do smell an intermittent…
The contact owns a 2020 BMW M340I. The contact stated that after an oil change was performed by an independent mechanic, there was a large amount of gray smoke coming from the exhaust pipe while accelerating from a complete stop. There was no warning light illuminated during the …
The contact owns a 2020 BMW M340I. The contact stated that upon starting the vehicle, the contact noticed a thick white smoke coming out of the exhaust pipes. In addition, the contact stated that there was an abnormal ticking sound coming from the engine while idling. There was n…
My oil pump went out causing Low pressure codes and resulting in me paying over 2 grand to get it repaired, They super seeded the oil pump they used to use with a new one and theirs many other reports online etc of the 2020 bmw m340 oil pump going out due to plastic internals whi…
Oil pump common issue of made out plastic cause miss interpretation of oil pressure. Developing engine issues under 50k miles
Hi. I’d like to point out I have not had an incident YET thankfully. However, I want to highlight that the early M340i production releases (2019 and 2020) are HIGHLY likely to experience catastrophic engine failure due to an oil pump being made of plastic on some models. Of the 2…
The contact owns a 2020 BMW M340I. The contact stated that while merging onto the highway and accelerating, there was an abnormally loud banging sound coming from the vehicle before the vehicle stalled. The contact was able to coast forward. There were no warning lights illuminat…
Electronic parking brake malfunction, disengage ineffective. Ongoing 2020 BMW mechanical issue, multiple dealer submissions, BMW refuses to open active recall. BMW requires $3,000 center panel replacement, out-of-pocket.
Source: NHTSA Complaints Database. Real owner reports for the 2020 Bmw M340i.
Safety recalls
2020 Bmw M340i recalls
10 campaignsNHTSA recall campaigns for the 2020 Bmw M340i. 10 recall campaigns are on record, so recall completion status should be confirmed on the exact VIN before purchase. Recalls are free to fix at authorized dealers, but completion status must be verified on the exact VIN.
SEATS
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
STRUCTURE:BODY:TRUNK LID
SEAT BELTS:FRONT:BUCKLE ASSEMBLY
STEERING:LINKAGES:TIE ROD ASSEMBLY
ENGINE
SEATS
SEAT BELTS
ELECTRICAL SYSTEM:STARTER ASSEMBLY
Research more
Keep researching before you buy
Compare brands and categories, then check the exact car's history by VIN.
Questions
2020 Bmw M340i buying FAQ
Buyer-focused answers based on real NHTSA complaint and recall data for this model year.
Is the 2020 Bmw M340i reliable?▾
Good Record. NHTSA currently shows 47 owner complaints, 0 crash-related complaints, and 10 recall campaigns for this model year. This BMW M340I year shows a meaningful number of reported issues, so buyers should only proceed after a careful records review and inspection. Treat this as a model-year signal, then verify the exact vehicle's condition and history before purchase.
What are the most common problems with the 2020 Bmw M340i?▾
#1: Engine Problems (36 complaints). #2: Uncategorized Issues (9 complaints). #3: Electrical Faults (6 complaints)
At what mileage do problems start on the 2020 Bmw M340i?▾
Mileage data is not available or insufficient for this model year.
How safe is the 2020 Bmw M340i?▾
Complaint data is not the same as crash-test scoring, but it does highlight possible risk patterns. For the 2020 Bmw M340i, NHTSA complaints include 0 crash-related reports and 0 fire reports out of 47 total complaints. For controlled crash-test ratings, check nhtsa.gov/ratings.
Does the 2020 Bmw M340i have any recalls?▾
Yes. 10 NHTSA recall campaigns affect the 2020 Bmw M340i. A major recall area is SEATS. 10 recall campaigns are on record, so recall completion status should be confirmed on the exact VIN before purchase. Always verify open recalls by VIN because completion status varies by vehicle.
Should I buy a 2020 Bmw M340i?▾
This BMW M340I year shows a meaningful number of reported issues, so buyers should only proceed after a careful records review and inspection. Model-year complaint trends can reveal recurring trouble spots before you spend money on inspections, financing, or repairs. Pay extra attention to Engine Problems during inspection. Before committing, run a VIN history report to verify accidents, title brands, odometer records, and recall completion for the exact car.
Source: NHTSA (National Highway Traffic Safety Administration) complaint and recall databases, aggregated by VinSpectorAI.
Wider context: See the full Bmw M340i reliability report with year-by-year comparison.
Owner Reliability Rating
Rate the 2020 Bmw M340i based on your ownership experience.
Add your rating:
Ratings are based on owner experience and are separate from NHTSA data shown above.
Before you buy
Check the exact vehicle history before you buy
Model-year complaints and recalls reveal patterns. A VIN report confirms whether the exact car has accident history, title brands, mileage issues, or open recalls.