"After experience of Shark Performance when I needed diagnostic work on my 2006 Passat 2.0 TDI 140bhp, I had no hesitation in getting them to remap the engine. Having checked the engine was in good health, the mapping process was carried out and the results were instantly noticeable. The car is far more responsive, with a wider power band, and the picks up in the mid range making it a lot more driveable. As a bonus, fuel economy is easily 3-4mpg better after the map if driven sensibly, and I have yet to see any less mpg than before even when driven hard. So far I have covered around 10,000 miles since the map with no issues whatsoever - important on a vehicle that covers 30K per year and will need to last until 200K miles. Highly recommended."
Many thanks Chris!