For future reference, the timing belt is almost always covered so you'd never see it. The auxiliary belt (aka drivebelt, accessory belt, alternator belt, fan belt) is the one you can see that runs the alternator and air con pump. They only cost about £20 and are super easy to change so very different to a timing belt.
Let's say u replace ur timing belt at 121k. And by luck ur water pump fails at 123k. Its easier just swapping it out than worrying about it there about $60 for a ford non-aftermarket one. It cut down labor costs too if u are not the one working on it
The average price of a 2006 Ford Focus timing belt replacement can vary depending on location. Get a free detailed estimate for a timing belt replacement in your area from KBB.com Car Values Replaced my timing belt without touching the water pump. Took 10 hours, but probably could cut that down to 5 if not less now I know the knack (I meticulously cleaned and documented everything I took off and put back on the car).
Timing belt replacement cost The cost to replace a timing belt may vary from about $200 to $750 depending on a model. Often your mechanic may recommend replacing a water pump or some other parts, such as, tensioner, seals idlers, etc. along with the timing belt; this obviously will cost more.
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ford focus timing belt change cost