Hi, why are the timing belt intervals so different? I am talking about two Volvos and their timing belt intervals in the family. I would be very interested in the technical background. – V70 I with 140 hp B5244S2 with electronic throttle flap from year 2001 and – V70 II with 185 hp D5 Diesel engine: D5244T4 with 2.4 L (2007). The V70 I differs in mileage and annual distances with the recommended timing belt change very much to the V70 II D5 with the D5244T4 from 2007 V70 I m it the B5244S2 engine: Timing belts and auxiliary aggregate belts Exchange every 120,000 km?? V70 II with the D5244T4 engine: Timing belts and auxiliary aggregate belts incl. water pump every 150 to 180,000 km or 10 years? The questions arise, because in particular my D5 Diesel has 267,000 km on it, Timing belts since 2017 came new at a mileage of 160,700 km. Wanted to change now (already) at the D5, several workshops, also that says to my trust, I could easily go further with it Thank you! 🙂