GS450h inverter exchange
Is there a difference between LHD and RHD inverters in the plug setup. The plugs from the vehicle to the inverter can only fit in the 1 place as they all differ in shape. the 2 orange cables have a similar looking connector on the end but there is a tab on each in a different location making it impossible to mix up. The only place could be the input side from the traction battery. I have not reversed them. Is there a diagram showing where each wire goes to from the inverter in both RHD and LHD?
My car is still parked in the drive unusable.
Last edited by Kiwidoors; Jan 10, 2020 at 02:23 AM.
Similar case to yours - RHD in a LHD car but still:
https://priuschat.com/threads/invert...gs450h.197632/
I got my LHD inverter for ~250eur (a bit lucky), highest I'd seen was ~1000eur. RHD inverters are consistently cheaper and more plentiful. I don't think anybody's ever purchased a new inverter for any Toyota hybrid... doesn't matter if it's a prius, camry, gs, etc.
I also somehow doubt that previous inverter versions won't be compatible... has the hybrid ECU & the wiring harness changed? I'm pretty damn sure that the AC/"gearbox"/HV battery have not changed.
Whatever you decide to do, keep us posted. I don't know what the situation is in NZ with regards to shipping parts from overseas, but again... plenty of RHD inverters from UK cars. G9200-30030 was used before your part, maybe it'll work here as well. I can't find what G9200-30170 is supposed to be - I recall there being multiple numbers written on the inverter assembly, will check my old one to confirm.
The G9200-30051 was superceded by the G9200-30170 in the GS450H as the letter from Toyota New Zealand shows.
Has the power output of the GS450H changed since it first came out? Why so many Inverter variants? Is there a compatibility list somewhere? If not someone should start one. I did purchase one from the US and it was setup backwards, I just made it fit, plugged it in and it says everything is ready, put foot on gas and it shows power flow from the battery then from the engine but all that is a lie because I just feel a microscopic forward movement and nothing else.
G9200-0040 in RHD
Letter from Toyota.Dear Michael
Thank you for your further contact to Toyota New Zealand regarding inverters for your 2009 Lexus GS450H, registration EYG---.
Toyota New Zealand do not have the information relating to why the previous inverter was superseded. Superseded can mean many things included but exclusive to:
- Change of Supplier
- Change of Manufacturer
- Part may have had an issue
All genuine Lexus parts and accessories are distributed and sold through our Authorised Lexus Network, therefore we recommend you contact the Parts Department at your local Lexus Store who will be able to advise you on availability and pricing for an inverter.
Can you please be more specific in relation to what build information you are after?
Regarding your request for your service/repair history, the vehicle was regularly serviced between 2009 and 2013 having the 30k,45k,60k,75k,90k and 105,000km completed. In June 2015, the Fuel Pressure Sensor recall was completed, and in 2011, the Valve Spring recall was completed. Lexus New Zealand holds no further records on file for your Lexus since June 2015.
Once again, thank you for your enquiry. Please do not hesitate to contact us if we can be of any further assistance.
Kind regards
Kelsey Charles
Customer Services Representative, Customer Dialogue Centre | Toyota New Zealand Limited
T 0800 869 682 | customercare@toyota.co.nz | toyota.co.nz
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There have been no power output changes to the GS hybrids, to my knowledge. If you see different acceleration and top speed figures - the EU version comes with a 3.266 diff, the NA/JDM version comes with a 3.769 diff.
Check this:
https://priuschat.com/threads/invert...gs450h.197632/
RHD inverter in a LHD car... same symptoms as you.
Another thing of note - 30040 is the earliest LHD inverter, 30061 is the "equivalent" to 30051... might be related.
You might want to browse the russian lexus club (club-lexus.ru) and other russian sites (drom, etc) - I've seen plenty cases of inverter failures there, maybe something will pop up. Still surprised that you're having trouble getting a RHD inverter... I was looking for a LHD here for a week in Europe until one accidentally popped up, RHD is available everywhere
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I got a G9200-30030 inverter from Lithuania for 295Euro delivered to New Zealand. Plugged the sucker in and


.All is good in the world.
Know this now.
G9200-30030 comes before
G9200-30051 follows G9200-30030
G9200-30170 follows G9200-30051
All 3 will work for a RHD 2009 GS450h.
Total GS450h Project cost to date....
Car NZ$ 1500.00
Toyota attempt battery charge (fail) NZ$ 320.00
Buy 2 Chargers and Power supply NZ$ 500.00
Buy wrong LHD inverter NZ$ 950.00
Buy right inverter NZ$ 290.00
Total NZ$ 3560.00
Its running with no faults
Time will tell.
Thank you for your very helpful input.
Live long and prosper

Do make sure that you've bled the inverter properly. There's a bleed terminal at the inverter radiator (the one in front and at the top, terminal/outlet is at the front, left side) - you're supposed to attach a clear hose to the outlet (which is pointed downwards for whatever reason, and it's not on top of the radiator... weird as hell), loosen the plug with a hex key, remove radiator cap, fill until both are level (communicating vessels, on that note - make sure the car is parked at a level spot), close the radiator bleed plug, detatch hoses/etc, bleed system (techstream, running the electric water pump on(3min) and off(1min) and topping up... the pump also starts running about 20sec after the car enters "ready" mode). LHD cars also have a bleeder terminal near the inverter and the radiator is on the other side of the car (more accurately, the inverter has been moved over)... the relocation of components on LHD gs450h's must've been an afterthought :P
The 4th (well, 2nd hybrid) gen GS450h has a separate inverter reservoir which you don't really have to bleed (like all prius models, the LS, RX, camry, just about everything)... I'm wondering whether to attempt converting mine.

Do make sure that you've bled the inverter properly. There's a bleed terminal at the inverter radiator (the one in front and at the top, terminal/outlet is at the front, left side) - you're supposed to attach a clear hose to the outlet (which is pointed downwards for whatever reason, and it's not on top of the radiator... weird as hell), loosen the plug with a hex key, remove radiator cap, fill until both are level (communicating vessels, on that note - make sure the car is parked at a level spot), close the radiator bleed plug, detatch hoses/etc, bleed system (techstream, running the electric water pump on(3min) and off(1min) and topping up... the pump also starts running about 20sec after the car enters "ready" mode). LHD cars also have a bleeder terminal near the inverter and the radiator is on the other side of the car (more accurately, the inverter has been moved over)... the relocation of components on LHD gs450h's must've been an afterthought :P
The 4th (well, 2nd hybrid) gen GS450h has a separate inverter reservoir which you don't really have to bleed (like all prius models, the LS, RX, camry, just about everything)... I'm wondering whether to attempt converting mine.
I'm quite interested to convert to the 4GS reservoir, but I noticed the 4GS has a separate radiator for the inverter coolant circuit... I'll do some measurements
If I'm reading this right, if we convert to the 4GS method, it is completely separate coolant loop not shared with the main engine loop?
Did you manage to try the 600h inverter? I saw a few RHD ones for sale on Yahoo auctions Japan
I don't have time to attempt this now, but it's definitely on my list of things to do
btw what are you using to measure inverter temps? Hybrid Assistant?






