M Buyers Guide
Inspection checklist
M850i G14 facelift, 2023 to 2026
Before you go
- Open recalls. Run the VIN through NHTSA or a BMW dealer and ask for proof every recall was done.
- History report. Check the title, accidents, owners and mileage record.
- Service records. Ask for them in advance, ideally from a BMW dealer or specialist.
- Certified or not. BMW can still certify 2023 to 2026 cars. If this one is certified, ask for the paperwork showing when its cover ends.
- Independent inspection. Book a pre-purchase inspection with a shop that knows this engine.
Known problems on this car
- Oil and coolant leaks about $1,500 to fix
Inspect for leaks at valve covers, turbo oil lines, and the cooling system.
- Cooling system load about $1,500 to fix
Verify cooling parts have been refreshed past 80k mi, ask if owner has run 5k to 7.5k oil intervals.
- Valve stem seals about $4,000 to fix
Look for blue startup smoke, request a leakdown on high mileage cars.
- Oil consumption about $1,500 to fix
Ask owner about oil top-ups between changes, review service records.
At the viewing
Same checks as the pre-LCI convertible plus the latest iDrive software. Check that the illuminated grille works and that the top cycles fully. On 2023 cars, check that recalls 23V-099 and 23V-821 are done.
Notes
From the M850i G14 facelift guide at M Buyers Guide. Repair costs are the guide's estimates, not quotes; the guide says where each comes from. Problems and costs as of the date printed.