BMW's 3 Series Touring PHEV pairs a 2.0‑litre turbo petrol with an electric motor and an 8‑speed automatic; it gives good electric-only running for short commutes but relies on the petrol engine for longer journeys. The high‑voltage battery and charging hardware are the difference-makers here — boot space is usually a bit reduced compared with non‑PHEV Tourings because of packaging, and the car benefits from regular charging and keeping hybrid software up to date. Check whether the manufacturer's battery warranty is still valid and ask for any hybrid-system service history.

• High‑voltage battery state‑of‑health report (usable capacity or percentage and recent diagnostic results) — PHEV range depends on it.
• Charging cable(s) and charge inlet condition; confirm it charges from a domestic socket and, if offered, from a wallbox.
• Hybrid system fault/history logs and evidence the car has been regularly charged rather than run always on petrol.
• Automatic gearbox behaviour: ensure smooth shifts and check for software/service history for the 8‑speed Steptronic.
• Boot floor and underfloor area for corrosion or damp (PHEV packaging can alter the load floor and introduce water traps); check luggage space is acceptable for your needs.