BMW 3 Series

The BMW 3 Series is one of the most enduring nameplates in the automotive world. Introduced in May 1975 as the successor to the 02 Series, it has been in continuous production across seven generations and consistently accounts for around 30% of BMW's annual global car sales. Few models in any segment can match that commercial record, and fewer still have maintained the same reputation for driver engagement across five decades.

What is the history of the BMW 3 Series?

BMW launched the first-generation 3 Series (internal code E21) in 1975 as a two-door saloon — a direct evolution of the 2002 that had earned BMW its driver's car reputation through the early 1970s. Over subsequent generations the range expanded considerably, adding a four-door saloon, a two-door coupé, a two-door convertible, a five-door estate (Touring), a five-door liftback known as the Gran Turismo, and a three-door hatchback.

A significant structural change came in 2013 when BMW separated the coupé and convertible body styles into a distinct 4 Series lineup. Since then, the 3 Series has focused on saloon, Touring, and Gran Turismo variants — a cleaner portfolio that has helped sharpen the model's identity.

How many generations of the BMW 3 Series have there been?

Seven generations have been produced to date, each carrying an internal BMW chassis code:

• E21 (1975–1983) — the original; two-door saloon only, four-cylinder and six-cylinder engines.
• E30 (1982–1994) — range expanded to include a four-door saloon, estate, convertible, and the legendary M3.
• E36 (1990–2000) — first generation to offer a true five-door Touring and a compact three-door hatchback.
• E46 (1997–2006) — widely regarded as a high point for driving dynamics; introduced the first inline-six common-rail diesel.
• E90/E91/E92/E93 (2004–2013) — final generation to include coupé and convertible before the 4 Series split.
• F30/F31/F34 (2011–2019) — first 3 Series with a plug-in hybrid option (330e); Gran Turismo introduced.
• G20/G21 (2018–present) — current generation; longer wheelbase, 48-volt mild-hybrid systems on most variants, and a fully electric drivetrain offered through the related i3 platform in certain markets.

What is the BMW M3 and when did it debut?

The M3 is the high-performance variant of the 3 Series, developed by BMW M GmbH. It debuted in 1986 as the E30 M3, a homologation special built to satisfy touring car racing regulations. That original model used a high-revving four-cylinder engine and a stripped-out body — a formula that won the Deutsche Tourenwagen Meisterschaft and launched a performance dynasty.

Subsequent M3 generations moved to inline-six and V8 engines before returning to an inline-six with a twin-scroll turbocharger in the current G80 generation, which also introduced all-wheel drive as an option for the first time in M3 history. The M3 Competition xDrive is currently among the fastest production saloons available in its class.

What body styles are available in the current BMW 3 Series?

The current G20/G21 generation is offered in three body styles:

• Saloon (G20) — four-door, traditional three-box layout; the most common variant globally.
• Touring (G21) — five-door estate; the practical choice, with a larger boot and standard air suspension on higher trims in some markets.
• M3 / M3 Competition (G80/G81) — performance saloon and Touring; a first for the M3 nameplate with an estate body option.

The Gran Turismo (F34) liftback was discontinued after the F-series generation and has not carried over to the G20 platform.

Why has the BMW 3 Series been so commercially successful?

Several factors have sustained the 3 Series at the top of the compact executive segment for nearly 50 years. The rear-wheel-drive platform (standard on most variants) gives it handling characteristics that front-wheel-drive rivals find difficult to match. BMW's longitudinally mounted inline-six engines are widely praised for their refinement and linearity. And the model has consistently positioned itself at a price point that feels aspirational without being inaccessible — a balance that competitors have tried to replicate with varying success.

The 3 Series has also accumulated a substantial awards record, including multiple European Car of the Year nominations, repeated victories in long-term reliability surveys, and consistent recognition in driving enthusiast publications across multiple generations.

How does the 3 Series compare with its main competitors?

What electrified options does the BMW 3 Series offer?

BMW has progressively electrified the 3 Series range. The 330e plug-in hybrid, first introduced on the F30 platform, continues on the G20 with an electric-only range of around 50–60 km under WLTP testing conditions, depending on specification. Many G20 petrol and diesel variants also feature a 48-volt mild-hybrid system that enables coasting with the engine off and provides a torque boost under acceleration. A fully battery-electric saloon in this segment is covered by the BMW i3 (sedan) offered in certain markets, though it shares only a conceptual lineage with the 3 Series rather than its platform.

Is the BMW 3 Series a good long-term ownership proposition?

The 3 Series has a strong residual value record relative to the broader compact executive segment, though ownership costs vary significantly by engine type and service history. Diesel variants — particularly the 320d — tend to offer the most favourable running costs for higher-mileage drivers, while the petrol inline-six models (330i, 340i) are preferred by those who prioritise driving feel. As with any premium European vehicle, maintenance at authorised service centres is recommended to protect both reliability and resale value.