The 3L Turbo diesel 4runner is the UN's workhorse of choice for the light duty vehicle category.
There are 2 types i've seen - one model with a mechanical fuel injection pump - 1KZ-T (mainly LHD),and one with an electronically controlled pump - 1KZ-TE (mainly RHD). Both are great vehicles.
I own the UN decommissioned mechanical pump base model which has not been sold in the European market in LHD. You can find it in South America under the alias Hilux SW4 with a small 3rd row seat even. Everywhere else it is known as the right-hand drive Hilux Surf model.
The UN 3rd Gen 4Runners incorporate the newer version of the 1KZ-T motor, which has all the great things about it - great on gas (28mpg), plenty of power, and practicality, to do just about anything you need, and has the major motor head issues of its older crackhead cousin fixed.
I have no issues aside from the regular and preventive maintenance necessities, which is great considering i am who knows which owner to drive it. Other than that it is very easy to work on this car.
I have no idea how many original miles on it (130K as of today), as there is no fool proof electronics that save mileage, especially in the mechanical pump model. The odometer is the only major controller based "computer" in this car. The car runs as long you dont cut-off the fuel to it.
The timing belt change is a procedure that can take about less than 20 minutes if you are good at it, Consumables - there is only oil and filter. Air filter is washable. Haven't found the need to replace it yet. Other parts are abundant as the it is the same platform as the TLC 90/Prado.
I've noticed that 1KZ-T is not picky to the fuel you feed it. I have seen that it can eat just about the worst quality of diesel there is available to it. Expect reduced MPG as the fuel quality degrades.
I did managed to heat up the motor a little bit, but I didnt damaged it. I was driving on the highway going 96mph

police: speed limit in Bulgaria is 140km) slightly uphill, loaded with around 400lbs of peaches in the trunk and with outside temp 38C/100F. with the AC on. It was going to blow but I saw my temp gauge arrow in time to ease on the gas a bit. :lookout:
Offroad I wont comment - no need.
As it is rare to find a LHD model of the 1KZT or 1KD(the newer motor...which practically makes the 4Runner double as a race car) of this car, take a look at the Land Cruiser 90 Prado. It is the same platform and with the 1KZ-TE. Plenty of them in the streets of Bulgaria and Europe in general... not as great as the 4Runners IMO, but the closest to them available. Dont know if they can pass Euro 2 tho.
Some pictures are in my garage link above.