Brilliance BM15L (BM family, 1.5 and 1.6)

Brilliance's 1.5 four — in the H230 and H330.

It is derived from Mitsubishi's 4A91, and the catalogue's own rows record it. That is the useful route into it: mitsubishi-4a9 in this catalogue describes the architecture, the chain and the variable valve timing, and its material applies where searching BM15L returns nothing at all.

Derived is not identical, and the difference matters for parts rather than for diagnosis — engine management, ancillaries and emissions equipment are Brilliance's.

Its complaints are the small-engine set: a carboned throttle body giving a hunting idle, ignition coils that fail one at a time, and a coolant temperature sensor that ruins economy quietly. Documentation outside China is essentially nonexistent.