Inverter Assembly Maintenance

[IndyDoug]

I recently passed 90k miles on my '05 Prius and was urged by a tech advisor to have my inverter assembly serviced and spark plugs replaced. Is this normal preventative maintenance for a Prius? Any other owners had this done at 90k?

[bwilson4web]

Originally Posted by IndyDoug

I recently passed 90k miles on my '05 Prius and was urged by a tech advisor to have my inverter assembly serviced and spark plugs replaced. Is this normal preventative maintenance for a Prius? Any other owners had this done at 90k?

Yes on the inverter coolant although a little early.

A little early, but OK on the spark plugs too.

If the transaxle oil has not been replaced, have it done too.

GOOD LUCK!
Bob Wilson

[richard schumacher]

Have you read the Scheduled maintenance Guide that came with the Prius?

[FireEngineer]

If your handy around a car do the plugs and transaxle yourself. Inverter let the dealer do it.

Wayne

[Bear68]

Keep in mind, the transaxle/drive unit uses WS type ATF. DO NOT USE ANYTHING ELSE!! You will need to remove the drain plug and let the old fluid drain. Then reinstall the plug and remove the fill plug located halfway up the drive unit on the front side. You will need a pump of some sort to get the WS ATF into the unit.

Changing the coolant in the invertor is best left to the dealer since air bubbles in te system can quickly cause over heating and damage.

BIG $$$$!!!

[tochatihu]

For the ATF, it has previously been suggested - wise to confirm you can remove the fill plug before letting the fluid out through the drain hole.

[Bear68]

Little reminder here.... Toyota does not recommend a service interval for WS ATF. Unless it is contaminated somehow, or work is being done on the drive unit, the fluid should never require changing.

[dwreed3rd]

Originally Posted by Bear68

Little reminder here.... Toyota does not recommend a service interval for WS ATF. Unless it is contaminated somehow, or work is being done on the drive unit, the fluid should never require changing.

Just curious, what having it tested, costs, compared to having it changed. If you've already put 100K on it and intend to put another 100k on, Would it be just as practical to go ahead and have it changed in case there's some metallic particulates from the first 100K of metal on metal wear?

[snijd]

If you've never had the transaxle fluid changed, I suggest you take a look at this thread:

http://priuschat.com/forums/care-mai...nalysis-9.html

I changed mine at 20K, and was glad I did.

[dwreed3rd]

Re: my earlier post #8. I wonder, since there are cases of contaminates as early as 20K, if it would be a good idea to go ahead and the transaxle fliud changed along with the first oil change. This may help eliminate the possibility of any factory contaminates or particles from any extraordinary wear during the break-in period. I don't know the cost so the benefit may not be worth it, but we are planing to keep ours indefinately, and tend to err on the side of longevity. I used to do my first oil change @ 700 miles, to get rid of the break-in contaminates, but that was before the new metals, factory break-ins, and testing.