The second generation of the BMW 1 Series consists of the BMW F20 (5-door hatchback) and BMW F21 (3-door hatchback) subcompact cars. The F20/F21 generation was produced by BMW from 2011 to 2019 and is often collectively referred to as the F20.

For the second generation of 1 Series, the coupé and convertible models marketed separately using the new BMW 2 Series nameplate.

The F20/F21 was initially powered by inline-four petrol, inline-four diesel and inline-six petrol engines. In 2015, inline-three petrol and diesel engines were added to the model range. All engines are turbocharged.

Unlike most hatchback competitors, the F20/F21 uses a rear-wheel drive (rather than front-wheel drive) for most models. The F20/F21 is the first 1 Series to offer an optional all-wheel drive (called "xDrive" by BMW).

In July 2019, the BMW 1 Series (F40) began production as the successor to the F20.

v1.1
- New HRE rims with HRE or BMW badge (Opperslang)
- Reworked Physics! (TGN)
- Decreased file size (Opperslang)
- Carbon BMW badges (Opperslang)
- Added maps (Opperslang)
- Shader tweaks (Opperslang)
- New paints (Opperslang x TGN)
- Navigation (Opperslang)
- Interior AO mapped (Opperslang)
- Ext plastic AO mapped (Opperslang)
- Akrapovic exhaust (Opperslang)
- Tinted rear glass (Opperslang)
- Exhaust smoke (Opperslang)
- Exhaust Flames (TGN)
- Self-Lighting (TGN)
- Turn Signals (TGN)
- Cluster (TGN)
- Updated Materials (TGN)
- Content Manager Paintshop (TGN)
- PBR Materials (TGN)
- PBR Glass (TGN)