10.0

really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
0 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2020 BMW M340i engine problems

engine problem

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2020 BMW M340i Owner Comments

problem #13

Nov 222024

M340i

  • miles

A D V E R T I S E M E N T S

The starter malfunctioned causing electrical damage to the motor and related components. Although there is literature that exists that this is a potential problem for this vehichle, BMW refuses to fix the problem and is asking me to pay. My warranty is expired by 4 months, but I have only 37,800 miles. The fact that there are 105K vehicles with this potential problem is evidence that this problem exists. They should be paying for what is an obvious manufacturer defect.

- Los Angeles, CA, USA

problem #12

Sep 072024

M340i

  • miles
Oil level won-??t read. Can cause engine issues. Car has no dipstick to check for oil

- New Britain , CT, USA

problem #11

Mar 222024

M340i

  • miles
Oil doesn-??t read correctly Might be issue with oil pump

- Santa Ana , CA, USA

problem #10

Aug 192024

M340i

  • miles

A D V E R T I S E M E N T S

Brought my car in for a starter recall picked it up next day and drove home then came out to turn my vehicle on again and it wouldn-??t start. Burning smell from engine bay as well. Returned the car they inspected it and told me a faulty starter. When I brought the car in it was in perfect working condition I only brought it for the recall. I was then held accountable for 25% of repair costs.

- La Puente, CA, USA

problem #9

Jul 232024

M340i

  • miles
Oil pump failure, causing inability to read oil level. Also flickering oil light on and off. After some research noticed it was happening to a lot of others as well due to oil pump being made with plastic internals. BMW has since updated to a new pump with metal internal the next year however never recalled old pumps.

- Hurricane , UT, USA

problem #8

Mar 072024

M340i

  • miles
Car was driving fine after a dealer oil change, then on a long road trip I get the error message "low oil pressure" stop car and take back to a service center. BMW dealership in San Rafael CA says that BMW NA told them to remove the oil pump and inspect it, but that it may not solve the issue. My car has a [XXX] production date according to the VIN. There are many other BMW M340 owners that have had to get their oil pumps replaced for the 2020 model year, same as mine. The new oil pump has a different design, metal impeller vs. plastic on the old one. The repair cost is quoted by the dealer as $6k + the parts, and they still wont know if it fixes the issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- San Rafael, CA, USA

problem #7

Dec 062023

M340i

  • miles

A D V E R T I S E M E N T S

Unable to read oil measurements Above 18% many 2020-??s have a had a oil pump replacement

- Fairfax, VA, USA

problem #6

Apr 132023

M340i

  • miles
Oil measurement fails at 20%, unable to tell how much oil is in engine, can lead to severe engine damage where the engine seizes and you loose power brakes and steering. Dealer says only fix is oil pump replacement.

- Mcdonough , GA, USA

problem #5

Sep 222022

M340i

  • miles
Oil level wouldn't read over 20 percent... the deals know it's an issue and it is related to the Oil pump

- Rahway , NJ, USA

problem #4

Oct 102022

M340i

  • miles
Unable to read oil level, high or unusually alarming oil pressure. High oil pressure codes

- Hanover Park, IL, USA

problem #3

Nov 012022

M340i

  • miles

A D V E R T I S E M E N T S

Electronic oil level sensor can-??t read oil level. Vehicle is currently at the mechanic shop getting the oil pump replaced. It-??s costing me around $2,500 out of pocket since I don-??t have a active warranty anymore.

- Skokie , IL, USA

problem #2

Apr 192023

M340i

  • miles
Oil pump in earlier models are known to fail prematurely due to plastic internals. There is a revised oil pump that has all metal internals but those have early model vehicles with same engine have received oil pumps that fail and can be catastrophic while driving and causing injury if vehicle fails and causes accident.

- Richmond, CA, USA

problem #1

Jan 102023

M340i

  • miles
The engine oil pump has failed. The part is available for inspection. The failed oil pump causes the engine to blow up, leaving oil and coolant behind on the road as hazards and causing our vehicle violently spin out on the road. The problem has been reproduced multiple times and claimed by bmw dealerships to be faulty on multiple occasions. Upon further research, it has affected 80% of the 2019 and 2020 g series chassis vehicles with the B58tu engine. BMW has a known problem of failed oil pump. As has my own 2020 bmw m340i. The only warnings we had were the oil not measuring through the interior display, the only way to check it no dip stick, not completing or stopping at 21% with failed measurement. It has first appeared for me at 20k miles, for others as early as 5k miles. The vehicle has not been inspected by police or insurance other than the dealer and local independent shop.

- Westminster , MD, USA

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