Subaru Timing Belt Intervals, Everything You Need To Know For better results when looking up the timing belt service intervals for your Subaru, you will need to know your vehicle’s engine size to use this table. Once you know, you can determine your Subaru timing belt service interval by using the first table and the reference key. Be sure to look at the second table to see whether or not the engine is interference-fit. Subaru Timing Belt Service Interval Chart Engine Reference Key, Remarks 1.2L Every 60,000 Miles 1.8L (Except Impreza) Every 52,000 Miles 1.8L (Impreza) {35} 2.0L Inspect Every 30,000 Miles: Replace Every 105,000 Miles 2.2L {54} 2.5L {54} 2.7L Every 60,000 Miles 3.3L Every 60,000 Miles Reference key...