Nissan Navara 2010 Problems

In a word, no. The D22 is a hard riding old barge and you should have realized that before you bought it. You could try carrying some load in it, that should soften the ride somewhat, otherwise fit the Pedders suspension. Before you do check with them on the effect the changes might have on the load carrying capacity of the vehicle. The tyre life you're getting is pretty good; I wouldn't be too concerned about that.

If it were normal why would they clean the EGR valve and reset the fuel pump? Clearly there is a problem, either with the pump or the injectors, as it seems to be getting too much fuel. Take it back and demand a real fix.

Nissan's response isn't acceptable, and you're right, the EPA  would probably put your car off the road if they saw it. It isn't  normal, and sounds like it's getting too much fuel when accelerating.  I would have a diesel engine specialist check it; I'm sure they would  be able to find the cause of the problem for you.

No it's not normal for a modern diesel to blow a lot of smoke. It sounds like it's too rich, check the fuel pump.

I could imagine that you could get better fuel economy when the cruise is not engaged, but it would depend on the calibration of the cruise and how aggressive it is, the specific vehicle in question, and the way you drive normally when the cruise is not in use. I doubt you could draw a general conclusion that fuel economy is always better when you don't use cruise. Perhaps you should try it for yourself and see if it does work for you.

80 litres is the volume of the tank, but that’s allowing for expansion of the fuel as the temperature rises, so you will never get the full 80 litres into it. The 70 litres you’re able to get in is about right.

I would send Nissan a letter attaching the invoice for the repair and ask that they reimburse you for the cost of the repair. They need to be made aware of your dissatisfaction, but I doubt they will come to the party.

It sounds like the torque converter locking up, which is a normal function of the transmission to save fuel. When it does you should see the engine speed drop as the converter locks up and rises again when it unlocks. It’s likely that you’re driving on or around the lock-up speed so you’re getting it cycling in and out of lock-up. Taking it out of overdrive at that speed will get around the problem.

We phoned around and the price you were quoted was very close to the prices we were quoted, it was actually lower than one. Few of us look beyond the purchase price when we buy a new car, but it’s a good idea to check the ongoing costs we will face after we’ve bought it. You experience is a good example; by buying the Navara you face higher servicing costs.