This 2003 BMW 540i (E39) left the factory with 4.3 L M62TÜB44 V8 and ZF five-speed automatic transmission. It is now powered by a 4.9 L S62 V8 from a 2002 BMW M5. The rest of the factory drivetrain was swapped for the M5’s six-speed manual transmission and limited-slip differential. The wagon rides on Dinan front springs, Koni Yellow Sport shocks, M5 steering box, and M5 brakes. A set of Style 65 18-inch wheels hold Firestone Firehawk Indy 500 tires (245/40, 275/35). The interior features M5 front seats and door panels, microsuede headliner, and M-branded gauges. The wagon is for sale on Bring a Trailer located in Montpelier, Maryland.
Photos showing the car before and during the conversion process are provided in the gallery below