BMW S55 vs S58 comparison covering M3 and M4 applications, reliability, cooling, tuning, performance, maintenance and which BMW M engine is the better used buy.

BMW N57 engine reliability guide covering common problems, turbochargers, DPF, EGR, intake, emissions systems, models and what to inspect before buying.

BMW B47 reliability guide covering DPF regeneration, EGR, AdBlue and SCR systems, turbocharger, common diesel problems and a used-car buying checklist.

BMW N47 engine reliability guide covering timing-chain concerns, symptoms, diesel ownership, DPF and EGR issues, maintenance and what to inspect before buying.

BMW N55 vs B58 comparison covering reliability, common problems, turbo technology, tuning potential, models, ownership costs and which engine makes the smarter used buy.

BMW B48 engine reliability guide covering common problems, cooling leaks, oil leaks, ignition, tuning, BMW models using B48 and used-car inspection tips.

BMW B58 reliability guide covering common problems, cooling, oil leaks, tuning, models using the B58 and what to check before buying a used B58 BMW.

Complete BMW engine guide explaining B48, B58, N47, B47, N55, N57, S55 and S58 engines, BMW engine codes, reliability, applications and what used-car buyers should know.

BMW model numbers explained: what badges such as 320i, 330i, 40i, 20d, 30d, xDrive, sDrive, e, M Sport and M Performance mean.

BMW chassis codes explained with popular E, F, G and U examples including E46, E90, F30, G20, G80, G01, G05 and U11.

BMW M models explained, including M2, M3, M4 and M5 plus the important differences between full M, M Performance and M Sport.

BMW SUV models explained from X1 to X7 and XM, including size, purpose, coupe-style models and which BMW X model suits different buyers.