The turbo 4 cylinder uses all the 617 turbo parts including oil cooled pistons, sodium filled exhaust valves, strengthened bottom end, turbo oil pump and bigger radiator with turbo oil cooler.

If mildly boosted, either with a turbo charger or blower, with careful EGT and engine temp monitoring, one can have good success with longevity.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT