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It's all very confusing! Mine is certainly the newer D3 136bhp which appears to be eligible for the Polestar map.

To be honest, I've been surprised just how decent it is given the power output, but it would certainly benefit from some gains. This is by far the lowest power unit I have owned for at least 10 years, having come from a 220bhp petrol VAG engine, and prior to that a 5 series, but the car itself was in really nice condition so I decided to go for it.