BMW Knowledge Base

Technical articles, diagnostic guides and deep dives into problem BMW components.

951 articles in the base · updated regularly

All Cooling System 22 OBD-II Diagnostics 34 Transmission 16 Buying Guide 60 Engine Mechanical 377 Car Overview 327 Maintenance 47 Suspension 1 Electrical System 24

Model:

All 3-er G20 3-er F30 5-er G30 5-er F10 5-er E60 X3 G01 X3 F25 X4 G02 X5 G05 X5 F15 7-er G11/G12

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BMW 3 Series G20/G21 (2019–Present): Generation Overview

The BMW G20 is the seventh generation of the 3 Series and has been on the market since spring 2019; the Touring (G21) followed in fall 2019. With the G20, BMW moved entirely to the modular B47/B48/B57/B58 engine family. The line is technically more mature than the F30 predecessor, but new topics come to the fore.

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BMW G20 (2019–2022): Full Breakdown of Problems, Reliability, and Ownership Secrets

A full breakdown of the BMW G20 (2019–2022): common problems in the gasoline, diesel, and hybrid versions, maintenance advice, and a checklist for buying a used one.

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BMW G20 (3 Series): A Complete Breakdown of Reliability, Problems, and Maintenance for Owners

A full reliability breakdown of the BMW G20 (3 Series, 2018+): typical problems at 37,000–62,000 miles, the maintenance schedule, a pre-purchase checklist, and a comparison with the F30. Find out whether the G20 is worth buying in 2025.

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BMW G20 330i: Generation Overview, Specs, and Owner Experience

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BMW 3 Series G20 330i: Ownership Experience, Reviews, and B48 Engine Reliability

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BMW 3 Series G20 330i: Long-Term Reliability — The Full Breakdown

A component-by-component look at BMW G20 330i long-term reliability: B48 engine, ZF 8HP transmission, chassis, electronics, common problems, and the maintenance schedule that keeps it healthy.

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