2005 GX470 with 107k miles - preventive maintenance? Where to start?

[danmm7]

I recently bought a 2005 Lexus GX470. Truck has 107k miles and it's in excellent shape.
Previous owner was very regular when it came to maintenance and he gave me records of everything that was done. Truck was serviced at very reputable and $$$ Japanese car shop, not dealer.
Here is a short list of what was done:

New radiator and thermostat @ 67k miles
New Timing Belt, Water Pump and number of tensioners @ 93k miles
AT fluid flushed @ 68k miles
Differential fluids and transfer case fluid replaced @ 93k miles and twice before that.
PS and Brake fluid replaced @ 80k miles
Rear shocks replaced @ 39k miles due to leak
Front shocks replaced @ 62k miles
New Michelin M/S2 Tires @ 96k miles

Based on all the paperwork i have, i can conclude that my truck still has the following, never replaced:
- Original starter
- Original alternator
- Original serpentine belt
- Original radiator hoses
- Original Fuel filter & fuel pump
- Original spark plugs & coils
- Most of the original coolant

In addition, on the repair receipts, under the transfer case service, i see that the repair shop was using "ATF" and no other details are given about the fluid. Should i be concerned?


Like i said, the truck currently drives fine and does not appear to have any issues, except one torn inner CV boot. I am replacing the boots this weekend.

I am planning to drive this SUV mostly on long trips to our mountain cabin. It's a 4 hour drive, half of it is in the hills/mountains. During the winter, it gets cold, slippery, and traffic can get slow and brutal. You do not want to have a major car breakdown there, especially when you have your family and gear in the car.

So, based on the list i provided above, what would you suggest i replace/inspect soon, before i start driving the car to the mountains? I am perfectly OK with spending some $$$ on preventive stuff, but if these cars are rock solid and most of the stock components usually last 150k+ miles, maybe i am OK for another year or two. On the other hand, if there are well known "Weak" components that can leave me stranded on the road - i don't want to risk it.

What is your take on this?


Thanks in advance!

 

[bamachem]

I would do some Amsoil Low-Viscosity ATF and some new spark plugs. Clean the MAF.

That's it.

So, am I reading it right that it's had THREE timing belt changes by 93k???

 

[danmm7]

I would do some Amsoil Low-Viscosity ATF and some new spark plugs. Clean the MAF.

That's it.

So, am I reading it right that it's had THREE timing belt changes by 93k???

Any concern around the Starter, fuel pump or alternator suddenly going out at this mileage...or they are not a weakness on these cars?

The Timing belt ... sorry, i meant to say that the diff fluid was changed @93k and twice before that. T-belt was changed only once at 93k.

 

[SouthernSS]

I havent heard of those things being particularly troublesome. Hows fuel economy? If its bad you may consider new 02 sensors. I'd just change the plugs and call it a day otherwise.

 

[GXO]

I havent heard of those things being particularly troublesome. Hows fuel economy? If its bad you may consider new 02 sensors. I'd just change the plugs and call it a day otherwise.

x2 on that one.

 

[danmm7]

I replaced the spark plugs last week.

I also replaced the drive belt, just in case. The original belt had zero cracks or wear signs on it, but since it was of unknown age, i decided that it was worth spending $35 for new belt.

In addition...

- New differential and transfer case synthetic fluid.
- New front brakes - both rotors & pads
- New filters
- Greased both drive shafts with RedLine synthetic grease.
- Replaced front sway bar end links, due to clunk when turning right.

Took the SUV on a 600 mile trip to our mountain home. Mix of 70-80mph freeway and 25% mountain driving - it gave me average gas mileage of 18.7mpg. I hope this is good for a 2005 GX with 108k miles and 3 people in the car. Not sure if i need to replace the oxy sensors yet, given the MPG.