Holden Trax: 1.8 petrol runs a timing BELT — 150,000 km or 10 years, and owners miss it

This is the single most valuable thing to know about a naturally aspirated Trax and most owners do not know it. The 1.8 litre petrol uses a timing BELT with a factory interval of 150,000 km or ten years, whichever comes first — while the turbocharged 1.4 in the same car uses a chain that is intended to last the life of the vehicle. Because the two engines sit in identical-looking cars, a 1.8 owner who has heard "it's a chain" applies that to their own car and never books the job. The ten-year half of the interval is what catches people: a low-kilometre 2014 Trax is well past due on age alone regardless of how little it has been driven. Ask for the invoice, and read it, because a belt replaced without its tensioner and idlers is a job half done.

• Usually nothing — a timing belt gives very little warning before it fails
• Rattle or rumble from the front of the engine, most noticeable at idle
• Coolant weeping from the front of the engine if the water pump is going with it
• Engine turning over but not starting, after the fact
• Squeal or chirp from the belt area on a cold start

First work out which engine you are looking at, because the answer changes everything: check whether the car is badged or specified as the turbocharged 1.4 or the naturally aspirated 1.8, and confirm it against the paperwork rather than the badge alone. If it is the 1.8, the timing belt question is the most important one you will ask about this car. Ask when it was last replaced, at what mileage and on what date, and ask to see the invoice rather than accepting an answer — you want the tensioner and idlers listed alongside the belt, and ideally the water pump. Treat "I'm not sure" as meaning it is due now, and treat any date more than ten years old as due regardless of the kilometres since. Look for a service sticker under the bonnet or inside a door jamb. With the bonnet up and the engine idling, listen at the front for a rattle, rumble or squeal, and look for coolant weeping or dried crusty residue near the water pump area. If a workshop inspection is possible: ask for the belt condition to be assessed behind the cover before you agree a price.

Parts involved: Timing belt.

$700 to $2,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Is this the 1.4 turbo or the 1.8, and when was the timing belt last replaced?”
• “Can I see the invoice, and does it list the tensioner and water pump?”
• “How many years ago was it done, regardless of the kilometres since?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.