This Complete Manual Gearbox Opel Insignia Sedan MR6 6-Speed Manual A20DTH Diesel 1956cc (2008–2017). The gearbox is a 6-speed manual transmission coded MR6, and it is designed to work seamlessly with the A20DTH diesel engine, which has a displacement of 1956 cc. The unit listed here was manufactured in 2009, and is a used original equipment (OE) part, providing an authentic replacement solution for worn or damaged gearboxes in compatible vehicles. The A20DTH engine is part of Opel’s efficient diesel lineup, commonly found in mid-size sedans such as the Insignia, known for combining performance with economy. The 6-speed MR6 manual gearbox enhances driving dynamics and fuel efficiency, offering smooth shifting and reliability over long-term use.