B205R HOT engine with 205 hp (153 kW). The first generation 9-3 was also the first Saab available with a diesel engine, a unit also found in the Opel Vectra, Astra G, Signum, Zafira A. Unlike the Saab 900 (NG), the 9-3 is fitted with a CAN bus like the Saab 9-5.
A high-powered version of the Saab 9-3, the "Viggen" (English: Thunderbolt), was marketed from 1999 to 2002. It was named after the Saab 37 Viggen aircraft. The Viggen included a turbocharged 2.3 L engine (B235R). Initially, it was rated at 225 bhp (168 kW; 228 PS) and later at 230 bhp (172 kW; 233 PS) on 1.0 bar (15 psi) of a boost from its Mitsubishi TD04-HL15-5 turbocharger. The cars were equipped with a higher capacity intercooler, performance-tuned ECU, flow-through muffler and tip, heavy-duty clutch and pressure plate, stiffened and lowered springs, firmer dampers, as well as stronger CV joints and driveshafts.