Ideally coolant should be replaced every 5 years or 50k miles, whichever is first.
Toyota Red coolant (LLC) is still available from the dealer, and is pretty reasonably priced (last time I bought some there). Or you can use Zerex Asian, which should be chemically the same.
I avoid so called, "Universal" options because there have been so many different kinds and some are not compatible that I remain skeptical.

Note that using the wrong type of coolant may seem to work, "just fine" for quite a long time, but the erosion of the head gasket, or the development of silicon silt in the coolant passages are the risk and neither gives symptoms until the engine fails (I've seen both, from those using wrong type of coolant in Toyota engines).

To drain the old, you can open the little petcock at the bottom of the radiator or you can remove the bottom coolant hose. I like using the hose because it allows it out much faster, and sometimes after having opened the little valve it won't seal afterwards, dripping.

You will need 2 gallons (7.3quarts).

 

Thanks for weighing in and adding suggestions. I find my owners manual says

"Ethylene-glycol type coolant for proper corrosion protection of aluminum components"

When I did google search it showed

"ethylene glycol coolant corrosion inhibitors for aluminum engines"

and Listed :

Valvoline 50/20 , Peak 50/50, Prestone all vehicles , Napa Asian Vehicles , Supper Tech 50/50

Antifreeze corrosion inhibitor composition for aluminum engines

Abstract

An antifreeze composition for use in aluminum internal combustion engines is disclosed. It is comprised of 0.07 percent to 0.35 percent nitrate, 0.04 percent to 0.08 percent silicate, 0.05 percent to 0.25 percent tolyltriazole, benzotriazole or a mixture thereof, 0.2 percent to 1.5 percent borate, and 0.2 percent to 0.75 percent phosphate.
Classifications

C09K5/20 Antifreeze additives therefor, e.g. for radiator liquids

What is the difference in Toyota Red coolant (LLC) & Zerex Asian compare to above list ?

What is it mean by "proper corrosion protection of aluminum components" ?

*** I am not able to see parts store in my area carry Zerex Asian coolant. Who do carry this coolant ?

Thanks for your guidance.

 

Your dealer sells Toyota LLC (red), and it is in my experience competitively priced.

 

Thanks for weiging in .

We know toyota is not making coolant . I am not sure, who makes coolant for their branding .

I find Super Tech OE Red Antifreeze Prediluted 50/50

and east get from store.

Any one from this forum use this in their Toyota ?

What is your opinion about this coolant ?

Thanks for your guidance.

 

I would buy Toyota "red" coolant as it is factory fill for older Toyota cars before 2002. You can get it on Amazon for around $35 for a gallon of concentrate that will make two gallons of 50/50 mix. You will need a gallon of distilled water to mix it with that most grocery stores have. Coolant needs to be changed by time as well as by mileage. AMD from the car care nut channel recommends 3 years or 36k miles for "red" coolant. Check him out, he is a Toyota master technician and has lots of great information on his channel. If left in the car too long the coolant becomes acidic and attacks the radiator, heater core and most importantly the head gaskets. You need to change it now. Also check out a no spill coolant funnel on Amazon as these make bleeding the air out of the system simple and mess free.
Also while I'm thinking about it you need to inspect your radiator, if it is a sort of brown color and if you look very closely at it and can see lots of very, almost micro cracks on the surface, it needs to be changed as well. Mine looked like this and while driving to work one day it split open on the top and puked all of the coolant out in a matter of seconds. Had to be towed home. rock auto has OEM Denso radiators for your car for around $100, less than half of a Toyota branded part. I would also replace the thermostat as well as I well bet you it is the original and easy to change while you have the coolant drained to change it.

 

Thanks again for weighing in.

I did search in this forum, where I found an old thread

OEM Coolant or.....

@24hourgmtchannl

Many folks weighed in there , but @24hourgmtchannl with chemical background rational caught my eye.

We know most of the items coming with Toyota or recommended by care care nut channel not manufactured by Toyota, but branded by Toyota.

We are paying premium or Toyota Tax for such purchases . What do all think about it ?

I see Super Tech OE Red Antifreeze Provides 150K miles or 5 years


Toyota OEM RED factory refill can last upto 10 Years or 100K, butneed to be changed every 5 years or 60K. Red coolant has shorter life than the pink color , which need to be changed every 2 years or 30K miles.

Thanks again.

 

Thanks again for weighing in.

I did search in this forum, where I found an old thread

OEM Coolant or.....



Many folks weighed in there , but @24hourgmtchannl with chemical background rational caught my eye.

We know most of the items coming with Toyota or recommended by care care nut channel not manufactured by Toyota, but branded by Toyota.

We are paying premium or Toyota Tax for such purchases . What do all think about it ?




Thanks again.

Don't overthink it. Just buy what you want.
You can buy the cheap "green stuff" knowing its not as good as the "Toyota" stuff but know that you don't get the same performance and longevity. So you'll likely have to change it sooner. With regular maintenance it'll be fine.


Or you can buy the "OE" fluid type which I believe is made by Zerex??? You can grab that at Some auto parts stores.

Or you can pay a little bit more and grab the "Toyota" branded stuff from the dealer. Around here I can't find the Zerex stuff since its not in stock so i just grab the Toyota stuff from the dealer for about $25-30


The Zerex / Toyota stuff will last longer than the green stuff so you can go longer between intervals.




Since you don't use your car much I'd go by age and not worry about mileage. I'd personally go with a 2 year for the cheap stuff and a 5 year interval change with the Toyota / Zerex stuff with your statistics. 5 years is pretty long but its an easy change interval to remember.




Brake fluid, i'd also go with a 5 year interval especially if you live in a high humidity area as I do.

 

When I buy coolant from my local dealer I was surprised to find it is about the same price as other coolants.

Regarding buying Toyota branded fluids. It is true they are not made by Toyota, but then neither are ANY of the parts you buy from the dealer. They are all made by suppliers. The important thing to note is that when you buy parts made by Toyota suppliers (either via dealer, or directly from Denso, Aisin, etc.) you know you are getting the original Toyota quality.

Aftermarket parts are cheap, and there is often a reason related to quality / consistency of quality performance.

 

You can test the coolant and brake fluid with test strips to see how its doing if you like.

Personally, I do brake flushes every two years and it's a one person job if you use a Motive products power bleeder with the adaptor for the Toyota MC, no need for a second person and pumping brake & open & close bleeder & check fluid in MC etc. Never have to worry about messing up the MC piston seals because you over travelled the seal in the MC bore to an area that the seals never travel to. Fwiw brake fluid is hydroscopic, and the MC cap is vented to atmosphere it is not a completely sealed system.

For the coolant take a look at the owner's manual seems Toyota really does not have much to say about it except use Ethylene-Glycol at 50/50% so pick your favorite and have at and I try to stick with the same brand. Fortunately, Toyota not only has a drain plug at the radiator but also 1 or 2 drain plugs at the engine block depending on the engine to drain the engine.

 

Note that Toyota does say to use a silicate free coolant.
I have personally seen the inside of a Toyota engine which had been using the classic green Prestone and all of its coolant passages had a fine sand (silica) in them.

That is the kind of thing that can go on for years, and everything will seem totally fine, until one day when the engine overheats.

 

Never had a problem with that. Thats why upkeep and maintenance with cheaper coolants is key / important to do.