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Hi, The DI casette went up in smoke (literally) during starting. No ignition at all after that....just smoke It is a simple procedure to replace a DI but the failure comes at 63,000 km, tot 80,000km was the benchmark? My 9000 aero's DI went 120,000 before losing one cylinder Nevermind, but this is an unexpected total failure without any warning whatesoever. Losing one cylinder still buys u time to limp home but what if you are on an expressway and have a total failure like mine? Thing is the car is religiously maintained at every 10,000 km. Only difference is that I use Denso Iridium plugs....the one with the 0.4mm tips. Selected the correct heat range from the menu at Autobacs (they do have a plug specified for the 95)....response is a little better than the NGKs. Would like to seek opinions from fellow Saab fans...is using Denso plugs okay and what is the general expectancy for a DI casette. Will running slightly more 'enthusiatic' ECU settings also accelerate the demise of DIs? The thing that worries me is that the DI literally smoke out....a typical failure normally loses one or two cylinders....not as catastrophic