The engine is probably very reliable, but my Clio 1.5 dCi with 85 hp lacks punch when overtaking and staying in the left-hand lane on the motorway. Adding the P-Tronic tuning box has made it more responsive and easier to handle. Fitted after 70,000 km, it now totals nearly 400,000 km and I am more than satisfied with my investment.

Tom U, Baden (Austria)