Both the BMW 4 SERIES and the MAZDA 6 are tracked here from official DVLA licensing data, and as of 2025 Q4 there are 116,703 BMW 4 SERIESs versus 63,250 MAZDA 6s still on UK roads. That makes the MAZDA 6 the rarer of the two — there are about 1.8× as many BMW 4 SERIESs left. Year on year their fortunes diverge: the BMW 4 SERIES is rising (+1.2%) while the MAZDA 6 is falling (-7.9%).
| BMW 4 SERIES | MAZDA 6 | |
|---|---|---|
| Left in the UK (2025 Q4) | 116,703 | 63,250 |
| Rarity tier | Common | Common |
| Licensed | 113,913 | 53,165 |
| SORN (off-road) | 2,790 | 10,085 |
| Peak | 116,703 (2025 Q4) | 114,643 (2016 Q1) |
| Year-on-year | ▲ 1,394 (+1.2%) yr/yr | ▼ 5,431 (-7.9%) yr/yr |
The MAZDA 6 is rarer: 63,250 are left in the UK as of 2025 Q4, compared with 116,703 of the BMW 4 SERIES.
As of 2025 Q4 there are 116,703 BMW 4 SERIES and 63,250 MAZDA 6 still registered (taxed or SORN) in the UK, according to DVLA data.