Does Toyota Genuine Tranmission Fluid/Coolant Expire?

should be ok

 

I've got a ~3 year old bottle of the coolant, never even occurred to me it could get old. It's good for 10 years in the car.

 

Coolant starts to "degrade" the moment it's made, according to my friend who used to make it at Dow. I suspect it will last longer in the bottle than in the car, and it's good for a long time in the car, as Mendel says. So a year or two shouldn't be a problem.

 

if it did, i would think there would be a warning on the bottle.

 

Yeah, and expiration date.

Transmission fluid might be a little more prone to getting old, but who knows.

Why not just buy stuff as you need it, in particular with the transaxle fluid? At most you'll have a 1/2 quart kicking around for a few years.

 

Using it in 1.5 years is still good, not sure about the expiration date