What is the average cost of a timing belt replacement?

The average cost of replacing a timing belt is about $500. Your actual cost will vary depending on the make and model of the car, as well as where you live. As far as labor costs go, it'll take between 2 and 6 hours to do the replacement. Labor can go at $40/hour on the low end, all the way up to $120/hr at BMW or Mercedes shops. See more here http://www.costhelper.com/cost/cars/timing-belt.html