Isuzu Problems

No, yours doesn’t have a DPF filter. The D-Max is generally reliable with no major issues to be concerned about.

It’s good insurance, particularly if you are going to be towing, as you plan to do.

It could a sensor in the ABS/TCS system; it could perhaps be the computer controlling the electronics. You need to have a diagnostic check done on the car to properly identify the cause of the problem.

I doubt that there will be a recall any time soon; it’s not the sort of safety issue that might trigger a recall. I wouldn’t be overly concerned about driving your D-Max from Perth to Brisbane, providing it has been serviced, the oil changed regularly, and it is in sound overall condition.

It could be some form of wind noise, either from the door seal, the rear view mirror, windscreen trim, or anything else that might be in the wind stream. To check the door seal, try running a strip of tape around it to block off the door gap and see what that does. It’s going to be a process of elimination.

It could be a fuel supply problem, so I would suggest checking the fuel pump.

The MU-X is solidly built and reliable, and I can’t see any reason why you should be unsure of it. If you want a seven–seat SUV it’s worth considering.

I wouldn’t go on a trip without fixing the issue. I'm surprised to hear that there is no stock in Australia, but I would reach out to Isuzu Ute Australia head office if you've only tried dealers so far.

UPDATE 12/2/19: Greg advises that this part was replaced under warranty shortly after this response was published. 

There are no issues of concern with the 2010 D-Max, just the regular issues of wear and tear on a vehicle that is almost 10 years old. It’s a good idea to have a mechanic check it for you before you buy it so that any issues that might need attention can be identified.

What they were referring to is the automatic burn of the Diesel Particulate Filter (DPF), which collects carbon in the exhaust while you are driving along, and then periodically goes through a cleaning process in which the accumulated carbon is burnt off. The burn-off happens automatically without you knowing it’s happening, but it needs regular freeway type driving for it to happen. If your travels don’t involve any freeway travel then the burn-off might not happen and you have to take it to a dealer to have it done manually. From what you tell us about your driving I would say it doesn’t suit a diesel, and you would be better off buying a car with a small petrol engine.