[RonZimmerman]

I am trying to drain and replace my coolant in a 4 wheel drive Highlander V6. I can't see the rear drain plug?

 

[phoenix2301]

Subbed as I'm about to do the same and my manual doesn't show the rear one - just the front one.

 

[RonZimmerman]

I guess no one has ever found the rear coolant drain plug.

 

[diver dave]

How about for the 2.5L? I can't seem to find any block drain plug for coolant.

 

[mytmouse]

1st time Highlander owner, 2004 V6 AWD, just bought, 1st post. At 198,950 miles on the clock I decided to change all fluids. Found the rear coolant drain plug....I don't see anyway to get to it without removing right front wheel. Once wheel is removed it is approximately 6" directly in line with lower drive belt. You can see it before removing wheel if your view is from behind the rear of the front tire/wheel, it is visible from floor with wheel on. Both take a 5/16" ID vinyl hose for draining, and a 10mm for plug. Both loosened with ease. I got almost 2.5 gallons out (rear heat). Thanks for the site!