This is the G02-generation BMW X4 introduced in 2018–19; diesel X4s are usually paired with BMW’s 8-speed automatic and often xDrive all‑wheel drive. Diesels of this era commonly have DPF/EGR and on some variants an AdBlue SCR system, so regular long runs help avoid DPF regeneration problems. The coupe roofline gives a sportier look but reduces rear headroom and slightly limits boot practicality compared with the X3.

• DPF and EGR condition — ask for evidence of regular motorway runs or a recent successful regeneration (clogged DPF is common if used only on short trips).
• Automatic gearbox behaviour and service history — check for smooth, consistent shifts and proof of fluid/gearbox service where possible.
• Turbo and smoke check — cold/hot start smoke or hesitation can indicate turbo, oil-control or injector issues on older diesels.
• Rear seat headroom and boot/luggage access — inspect rear passenger comfort and tailgate operation (coupe rooflines can scrape luggage clearance).
• Suspension and tyre wear — check for uneven wear or knocking from sport suspension bushings and test for firm/harsh ride from optional sports setup.