Replacement 2.5L M20 inline-six and five-speed manual, with the engine and gearbox reportedly sourced from a 1989 325is. The drivetrain received a timing belt, tensioner, oil pump, exhaust system, oxygen sensor, fuel injectors, alternator, fuel pump, clutch, flywheel, driveshaft hardware, and a 3.91:1 limited-slip differential between 2019 and 2021. It was acquired from the seller’s brother in 2019, with approximately 3,000 miles added under current ownership.