BMW M340i and 340i: performance, engine and what owners say

BMW M340i / 340i G20 (2020–) in dark gray, AI illustration

340i F30 · 2016–2018

320horsepower

4.80–60 mph, sec

The first B58 car: the 340i replaced the 335i, and a manual was still offered.

M340i G20 · 2020–

382horsepower

3.80–60 mph, sec

130mph top speed

382 hp from the same B58 six, automatic only. The fastest 3 Series below the M3.

F30 340i · 2016–2018

How fast is the F30 340i?

Sedan, 2016–2018. 0–60 times are magazine tests where we have one, otherwise the maker's figure.

340i

2016–2018

320 hp

Torque: 330 lb-ft
0–60 mph: 4.8 sCar and Driver test · Maker: 4.8 s
Gearbox: 8-speed automatic or 6-speed manual, rear-wheel drive

Sources

340i xDrive

2016–2018

320 hp

Torque: 330 lb-ft
0–60 mph: 4.9 sCar and Driver test · Maker: 4.6 s
Gearbox: 8-speed automatic or 6-speed manual, all-wheel drive

Sources

The engine: BMW B58

3.0-liter inline-6, turbo

Output320 hp (340i) to 382 hp (M340i)

Redline7,000 rpm

BlockClosed-deck aluminum

Engine's YouTube owner tone 59/100 (videos about the BMW B58 in every car that uses it, so it differs from this car's own tone below)

BMW B58 engine page →

Known issues

Oil filter housing leaksParts seller
The plastic housing and its gaskets can warp with heat and leak oil or coolant, often around 60,000–100,000 miles.
Fix: Replace the housing and gaskets.
1 owner complaint to NHTSA mentions it (2016–2018)
Coolant lossOwner-reported
Owners report coolant leaks. A parts seller names the water pump seal and the heat management module as common sources.
Valve cover and PCVOwner-reported
Valve cover gasket leaks and PCV valve faults are the most-reported B58 problems on owner forums, per SlashGear.

Engine sources

What owners say on YouTube

53This car's YouTube owner tone, out of 100 · #2 of 2 generations · videos about this generation only (the engine's tone above covers every car with that engine)

Owners praise

Handling and steering29%

Power and acceleration25%

Everyday comfort23%

Looks22%

Owners complain about

Nothing stands out.

Share of the 163 most-watched F30 340i videos that praise or criticize each topic (a praise or trouble word near it in the title or transcript).

Most-watched videos

Surprising Our EMPLOYEE with His DREAM CAR BUILD! (Full Transformation) BMW M340ithrotl · 2.8M views

The Truth About Owning a BMW M340icarwow · 2.8M views

Should you buy a F30 340i?

YouTube likes the 2018 best (54/100).
Budget for oil filter housing leaks: 1 owner complaint mentions it. Replace the housing and gaskets.
Repair costs: we don't have owner-reported repair costs for the 340i yet.

G20 340i · 2020–

How fast is the G20 340i?

Sedan, 2020–. 0–60 times are magazine tests where we have one, otherwise the maker's figure.

M340i

2020–

382 hp

Torque: 369 lb-ft
0–60 mph: 3.8 sCar and Driver test · Maker: 4.4 s
Top speed: 130 mph155 mph with performance tires
Gearbox: 8-speed Sport Steptronic automatic, rear-wheel drive
Weight: 3,849 lb2020
Price new: $54,0002020, plus $995 destination

Sources

M340i xDrive

2020–

382 hp

0–60 tested on a 2023 M340i xDrive.

Torque: 369 lb-ft
0–60 mph: 3.7 sCar and Driver test · Maker: 4.2 s
Top speed: 130 mph155 mph with performance tires
Gearbox: 8-speed Sport Steptronic automatic, all-wheel drive
Weight: 3,968 lb2020
Price new: $56,0002020, plus $995 destination

Sources

The engine: BMW B58

3.0-liter inline-6, turbo

Output320 hp (340i) to 382 hp (M340i)

Redline7,000 rpm

BlockClosed-deck aluminum

Engine's YouTube owner tone 59/100 (videos about the BMW B58 in every car that uses it, so it differs from this car's own tone below)

BMW B58 engine page →

Known issues

Brake-assist recall (engine software, 2020)Recall
On some 2020 M340i and M340i xDrive cars, the engine software could cut brake assist during engine start. Full mechanical braking stays available.
Fix: Dealer updates the engine software for free (NHTSA 21V-598).
1 owner complaint to NHTSA mentions it (2020–)
Oil filter housing leaksParts seller
The plastic housing and its gaskets can warp with heat and leak oil or coolant, often around 60,000–100,000 miles.
Fix: Replace the housing and gaskets.
Coolant lossOwner-reported
Owners report coolant leaks. A parts seller names the water pump seal and the heat management module as common sources.
2 owner complaints to NHTSA mention it (2020–)
Valve cover and PCVOwner-reported
Valve cover gasket leaks and PCV valve faults are the most-reported B58 problems on owner forums, per SlashGear.
3 owner complaints to NHTSA mention it (2020–)

Engine sources

What owners say on YouTube

63This car's YouTube owner tone, out of 100 · #1 of 2 generations · videos about this generation only (the engine's tone above covers every car with that engine)

Owners praise

Handling and steering29%

Power and acceleration25%

Everyday comfort23%

Looks22%

Owners complain about

Nothing stands out.

Share of the 163 most-watched G20 340i videos that praise or criticize each topic (a praise or trouble word near it in the title or transcript).

Most-watched videos

2020 BMW M340i vs Audi S4 vs Mercedes C43 AMG // Performance Sedan Face-OffThrottle House · 3.5M views

Surprising Our EMPLOYEE with His DREAM CAR BUILD! (Full Transformation) BMW M340ithrotl · 2.8M views

The Truth About Owning a BMW M340icarwow · 2.8M views

Should you buy a G20 340i?

New, the M340i cost $54,000 (2020, plus $995 destination).
YouTube likes the 2024 best (64/100).
Most owner complaints: the 2020 (57). Fewest: the 2024 (2). Raw counts, not per car sold, for every version NHTSA files under this name.
Budget for brake-assist recall (engine software, 2020): 1 owner complaint mentions it. Dealer updates the engine software for free (NHTSA 21V-598).
Budget for coolant loss: 2 owner complaints mention it.
14 recall campaigns across 2020–2025 (all M340I versions). Check a VIN before you buy.
Repair costs: we don't have owner-reported repair costs for the 340i yet.

Sources

BMW of North America: The all-new 2020 BMW M340i and M340i xDrive sedans (Nov 2018)

Compare the 340i

340i vs BMW M3See it →

340i vs Toyota GR SupraSee it →

340i vs Kia Stinger GTSee it →

340i vs Genesis G70 3.3TComing soon

All sources (8)

Motor Authority: 2016 BMW 3-Series benefits from significant updates under the skin (May 2015) outlet
0-60specs.com: BMW 340i 0-60 runs by magazine (Car and Driver, MotorTrend, Road & Track) magazine tests, aggregated
BMW of North America: The all-new 2020 BMW M340i and M340i xDrive sedans (Nov 2018) BMW
Wikipedia: BMW B58 Wikipedia (fallback)
FCP Euro: BMW B58 engine parts and common problems parts seller
SlashGear: Common problems with BMW's B58 engines, according to owners (Oct 2024) outlet
0-60specs.com: BMW M340i 0-60 runs by magazine (Car and Driver, MotorTrend) magazine tests, aggregated
NHTSA recall 21V-598: 2020 M340i / M340i xDrive and other B58 cars, loss of brake assist at engine start (Sep 2021) Recall

Showing the years only ().Showing every year.

Owner complaints to NHTSA

Counted from the complaints owners filed under M340i or 340i (most 3 Series complaints just say "3 Series" and can’t be split by engine, so these counts are low). NHTSA’s recall lookup has no separate 340i listing for 2016–2018; check a VIN for those cars.

No Lemon Index for the 340i: the index is complaints per car sold, and sales by trim aren't published. These are raw counts.

F30: 14 complaints for 2016–2018.

G20: 80 complaints for 2020–.

20166

20175

20183

202057

202111

20227

20233

20242

What they're about

F30 · 2016–2018

Engine4

Electrical system3

Wheels2

Service brakes1

Air bags1

G20 · 2020–

Engine51

Electrical system10

Power train6

Fuel/propulsion system4

Engine and engine cooling4

Recalls

19V600000 Seats2020
BMW of North America, LLC (BMW) is recalling one 2020 M340i and one M340i xDrive vehicle.
21V096000 Back Over Prevention2020–2021
BMW of North America, LLC (BMW) is recalling certain 2019-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, X4 xDrive30i, X4 M40i, M550i, X4M, X5 sDrive40i, X5 xDrive40i, X5 xDrive50i, X5M, X5 M50i, X7 xDrive40i, X7 xDrive50i, X7 M50i, Alpina XB7, 330i, 330i xDri
19V684000 Back Over Prevention2020
BMW of North America, LLC (BMW) is recalling certain 2018 540d, 2018-2020 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 530e, 530e xDrive, X3 sDrive, X3 xDrive, X3 M40i, X3 M, and 2019-2020 X4 xDrive, X4 M40i, X4 M, X7 xDrive, X7 M50i, 740Li, 740Li x
19V755000 Structure2020
BMW of North America, LLC (BMW) is recalling certain 2020 330i, 330i xDrive and M340i vehicles.
20V164000 Seat Belts2020
BMW of North America, LLC (BMW) is recalling certain 2020 X3 xDrive30e, X4 xDrive30i, X4 M40i, X4M, 330i, 330i xDrive, M340i, 840i Gran Coupe, 840i xDrive Gran Coupe, M850i xDrive Gran Coupe, M8 Gran Coupe, X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, and 840i xD
20V355000 Steering2020
BMW of North America, LLC (BMW) is recalling certain 2019 Z4 sDrive30i, 2019-2020 330i xDrive, M340i and M340i xDrive, 2020 X3M and X4M, and Toyota Supra vehicles.
21V598000 Engine2020
BMW of North America, LLC (BMW) is recalling certain 2020 M340i, M340i xDrive, 540i, 540i xDrive, X3 M40i, 2020-2021 X4 M40i, 745Le xDrive, 2019-2021 Z4 M40i, and 2020-2021 Toyota Supra vehicles.
23V211000 Seats2020–2021
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.
23V584000 Seat Belts2020–2022
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.
24V576000 Electrical System2020
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.
21V554000 Seat Belts2021
BMW of North America, LLC (BMW) is recalling certain 2021 2 Series (230i, 230i xDrive, M240i, M240i xDrive), 330e, 330e Xdrive, 4 Series Coupe (430i, 430i xDrive, M440i xDrive) M4 Coupe, M4 Competition Coupe, BMW 4 Series Convertible (430i, M440i), BMW X1 sDri
20V761000 Electrical System2021
BMW of North America, LLC (BMW) is recalling certain 2021 M340i xDrive, M440i xDrive Coupe, 530i, 530i xDrive, 540i, 540i xDrive, 740Li, 740Li xDrive, 840i Gran Coupe, 840i xDrive Gran Coupe, X5 sDrive40i, X5 xDrive40i, X6 sDrive40i, X6 xDrive40i, and X7 xDriv
21V298000 Seat Belts2021
BMW of North America, LLC (BMW) is recalling certain 2021 330i, 330i xDrive, M340i, M3, and 330e xDrive vehicles.
23V118000 Electrical System2023
BMW of North America, LLC (BMW) is recalling certain 2023 330i, 330i xDrive, M340i, M340i xDrive, M3, 330e, 330e xDrive, 430i Convertible, 430i xDrive, M440i, 2022-2023 430i, 430i xDrive, M440i xDrive, i4 eDrive40, and i4 M50 vehicles.

Source: NHTSA (api.nhtsa.gov). Check a VIN for open recalls on one car.

Quick answers

How fast is the BMW M340i?

The G20 M340i makes 382 hp and 369 lb-ft. Car and Driver measured 0–60 mph in 3.8 seconds. Top speed: 130 mph (155 mph with performance tires).

What engine does the BMW M340i / 340i have?

The G20 340i (2020–) uses the BMW B58, a 3.0-liter inline-6, turbo. Older generations: F30: BMW B58.

Updated Nov 13, 2026 · Free to use with credit: Source: The Lemon Index (lemonindex.com). Get the data

Spot a mistake or have an idea? Tell us

BMW M340i and 340i: performance, engine and what owners say

How fast is the F30 340i?

The engine: BMW B58

Known issues

What owners say on YouTube

Owners praise

Owners complain about

Most-watched videos

Should you buy a F30 340i?

How fast is the G20 340i?

The engine: BMW B58

Known issues

What owners say on YouTube

Owners praise

Owners complain about

Most-watched videos

Should you buy a G20 340i?

Compare the 340i

Owner complaints to NHTSA

What they're about

Recalls

Quick answers

How fast is the BMW M340i?

What engine does the BMW M340i / 340i have?

How can we make Lemon Index better?