Why does my car shake when I'm stopped at the lights?
A car shaking at idle usually comes down to four causes. Here's how to read what your car is telling you and which ones can wait vs. which ones can't.
How many previous owners is too many for a used car?
"One previous owner" is one of the most common selling points in a used car listing, and one of the least informative. The number of previous owners tells you almost nothing about what the car has been through. What matters is what each of those owners actually did with it.
Why owner count became a shorthand
The instinct makes some sense. Fewer hands generally means fewer opportunities for damage, deferred maintenance, or sketchy modifications. A car that has only ever belonged to one person, the logic goes, has a simpler and more legible history.
The problem is that this logic breaks down quickly in practice. One owner who never opened a logbook, pushed the car hard for 150,000 kilometres, and used it to tow a boat every weekend has left a very different machine than three owners who each serviced it on schedule, drove it gently, and sold it in good condition. The owner count is the same type of surface-level signal as listing a car as "garaged" or "well-loved." It sounds reassuring and tells you almost nothing concrete.
What "one owner" can actually mean
Here is where it gets more complicated. In Australia, a car can be registered in one name while being driven regularly by several different people. Family cars are a common example: one registered owner, multiple drivers with very different habits. That single entry in the transfer papers covers a lot of ground.
Company and fleet vehicles are another case worth knowing about. A car registered to a business counts as one previous owner on paper. In reality, it may have been driven by a rotating roster of staff over three or four years, with maintenance handled by whoever was scheduled rather than someone invested in the car's long-term condition.
Lease vehicles work similarly. A car sold at the end of a lease will often show one or two owners on the title, but the actual usage pattern depends entirely on the lease agreement and whoever was behind the wheel. "One owner" can also describe a vehicle that was written off and repaired under the same registration, though a PPSR check (a search on the Personal Property Securities Register) will flag write-off history. Worth the $2 government fee before committing to any used car.
