Car Model History

Seventh generation · G20/G21 · 2019–present

2020BMW 3 Series

The current 3 Series — sedan (G20) and Touring (G21) — on the CLAR platform, with plug-in-hybrid 330e options and the twin-turbo G80 M3, the first M3 offered as a Touring wagon (not US-sold).

Seventh generation · G20/G21

2020 BMW 330e G20 sedan, front three-quarter view

Photo: “BMW 3-Series (G20) 330 e (2020) (53334030393).jpg” by Charles from Port Chester, New York / Wikimedia Commons, licensed under CC BY 2.0. Cropped to 16:9.

Quick facts

Engines
2offered2.0L B46 turbocharged inline-four (330i) → 3.0L B58 turbocharged inline-six (M340i)
Top output
382hp3.0L B58 turbocharged inline-six (M340i)

Body stylesFour-door sedan

Start here

What do you need to know?

This page covers the whole 2020 BMW 3 Series model year. Choose your task first; exact trims and engines are separated where the factory offered different versions.

Complete, source-verified lineup

Find your exact 2020 3 Series

Start with a family, body style, or engine. Every card opens the facts and maintenance information for that factory version.

4factory configurations
Verified complete for the U.S.-marketHow this lineup was verified

We checked this U.S.-market lineup against period sources for the rear- and all-wheel-drive 330i and M340i sedans in BMW of North America's model-year update. Every version shown below has its own detail page.

Verified 2026-09-01 from BMW of North America — model year 2020 update information.

4versions shown
Four-door sedan

BMW 330i Sedan

Body
Four-door sedan
Engine
2.0L B46 turbocharged inline-four (255 hp / 295 lb-ft)
Gearbox
8-speed Steptronic automatic
Built
Regular production
Open exact version
Four-door sedan

BMW 330i xDrive Sedan

Body
Four-door sedan
Engine
2.0L B46 turbocharged inline-four (255 hp / 295 lb-ft)
Gearbox
8-speed Steptronic automatic
Built
Regular production
Open exact version
Four-door sedan

BMW M340i Sedan

Body
Four-door sedan
Engine
3.0L B58 turbocharged inline-six (382 hp / 369 lb-ft)
Gearbox
8-speed Steptronic automatic
Built
Regular production
Open exact version
Four-door sedan

BMW M340i xDrive Sedan

Body
Four-door sedan
Engine
3.0L B58 turbocharged inline-six (382 hp / 369 lb-ft)
Gearbox
8-speed Steptronic automatic
Built
Regular production
Open exact version

The 2020 model year

Overview

For 2020 BMW expanded the US G20 sedan range beyond the 330i and 330i xDrive with the M340i and M340i xDrive. The M340i pair used a 382-hp turbocharged inline-six, while all four configurations retained the eight-speed automatic and a choice of rear- or all-wheel drive.

Specifications

Engines
  • 2.0L B46 turbocharged inline-four (330i)255 hp
  • 3.0L B58 turbocharged inline-six (M340i)382 hp
Body styles
Four-door sedan

Year over year

What changed

  • M340i and M340i xDrive joined as the six-cylinder G20 performance models.
  • The 330i/330i xDrive four-cylinder pair continued below them.

Worth knowing

Notable

  • First US model year for the G20 M340i and M340i xDrive.
  • The plug-in-hybrid 330e and G80 M3 arrived for 2021.

Living with it

Reliability & ownership notes

  • Match service and replacement parts to B46 four-cylinder versus B58 six-cylinder powertrains.
  • xDrive models add front driveline hardware absent from the rear-wheel-drive cars.

Maintenance & service parts

Keep your 2020 3 Series on the road

Start with the service interval, then match the engine or exact version you own. Order links appear only when a catalog-backed part number is available, and every listing still needs a fitment check.

Service desk

What this car needs & when

Use this as a service-planning checklist for 2020 BMW 3 Series. Start with the interval, confirm which engine or configuration you have, then use an exact ordering reference when one is verified.

Service topics
5
Factory intervals
0
Fitment-scoped
5
Exact references
1

Before orderingIdentify your engine, options and build date.Part numbers and sizes can change within one model year. Shopping links appear only for catalog-backed references; still verify the listing against your vehicle before ordering.

  • Engine oil and filter

    Fitment must be confirmed

    BMW publishes this as a Condition Based Service task: follow the vehicle's displayed date/mileage forecast rather than a fixed generic interval.

    Applies to: 2020 · United States

    Source: BMW USA service-and-warranty library — select 2020 Maintenance booklet · Maintenance System — engine oil · checked

  • Brake fluid

    Fitment must be confirmed

    BMW publishes this as a Condition Based Service task: follow the vehicle's displayed date/mileage forecast rather than a fixed generic interval.

    Applies to: 2020 · United States

    Source: BMW USA service-and-warranty library — select 2020 Maintenance booklet · Maintenance System — brake fluid · checked

  • Cabin microfilter

    Fitment must be confirmed

    BMW combines this task with the engine-oil service occurrence identified by the vehicle.

    Applies to: 2020 · United States

    Source: BMW USA service-and-warranty library — select 2020 Maintenance booklet · Maintenance Intervals — "combine with Engine oil" tasks · checked

  • Engine air filter

    Exact reference available

    BMW combines this task with the engine-oil service occurrence identified by the vehicle.

    Applies to: 2020 · United States

    Source: BMW USA service-and-warranty library — select 2020 Maintenance booklet · Maintenance Intervals — "combine with Engine oil" tasks · checked

    2.0L B46 turbocharged inline-four (255 hp / 295 lb-ft) — K&N 33-3136

    K&N 33-3136

    Manufacturer-catalog replacement-part fitment only; it does not establish a BMW service interval. Confirm the VIN, production date, engine, and installed filter dimensions before ordering.

    Applies to: 2020 · 2.0L B46 turbocharged inline-four (255 hp / 295 lb-ft) · 330i · United States · Exact model-year and engine-family catalog scope; verify VIN and production date before ordering.

    Source: K&N — current BMW 330i/M340i replacement air-filter catalog · 2020 BMW 330i/330e/M340i 2.0L/3.0L gasoline or plug-in hybrid — 33-3136 · checked

    Verified ordering references

    2.0L B46 turbocharged inline-four (255 hp / 295 lb-ft) — K&N 33-3136

    K&N 33-3136

    Manufacturer-catalog replacement-part fitment only; it does not establish a BMW service interval. Confirm the VIN, production date, engine, and installed filter dimensions before ordering.

    Applies to: 2020 · 2.0L B46 turbocharged inline-four (255 hp / 295 lb-ft) · 330i xDrive · United States · Exact model-year and engine-family catalog scope; verify VIN and production date before ordering.

    Source: K&N — current BMW 330i/M340i replacement air-filter catalog · 2020 BMW 330i/330e/M340i 2.0L/3.0L gasoline or plug-in hybrid — 33-3136 · checked

    Verified ordering references

    3.0L B58 turbocharged inline-six (382 hp / 369 lb-ft) — K&N 33-3136

    K&N 33-3136

    Manufacturer-catalog replacement-part fitment only; it does not establish a BMW service interval. Confirm the VIN, production date, engine, and installed filter dimensions before ordering.

    Applies to: 2020 · 3.0L B58 turbocharged inline-six (382 hp / 369 lb-ft) · M340i · United States · Exact model-year and engine-family catalog scope; verify VIN and production date before ordering.

    Source: K&N — current BMW 330i/M340i replacement air-filter catalog · 2020 BMW 330i/330e/M340i 2.0L/3.0L gasoline or plug-in hybrid — 33-3136 · checked

    Verified ordering references

    3.0L B58 turbocharged inline-six (382 hp / 369 lb-ft) — K&N 33-3136

    K&N 33-3136

    Manufacturer-catalog replacement-part fitment only; it does not establish a BMW service interval. Confirm the VIN, production date, engine, and installed filter dimensions before ordering.

    Applies to: 2020 · 3.0L B58 turbocharged inline-six (382 hp / 369 lb-ft) · M340i xDrive · United States · Exact model-year and engine-family catalog scope; verify VIN and production date before ordering.

    Source: K&N — current BMW 330i/M340i replacement air-filter catalog · 2020 BMW 330i/330e/M340i 2.0L/3.0L gasoline or plug-in hybrid — 33-3136 · checked

    Verified ordering references

  • Spark plugs

    Fitment must be confirmed

    BMW combines this task with the engine-oil service occurrence identified by the vehicle.

    Applies to: 2020 · United States

    Source: BMW USA service-and-warranty library — select 2020 Maintenance booklet · Maintenance Intervals — "combine with Engine oil" tasks · checked

Collect

Bring this model year home

Find a scale model using the exact year, make, and model—not a generic generation search.

Famous variants this year

Sources

  1. BMW of North America — model year 2020 update information

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All Seventh generation · G20/G21 years →

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