Hangie

That is strange that your water pump failed so early. Did you put any strange coolant ?

For me he just hit the limiter and ignition cut off cause it.

I got similar problem few year good years ago with Honda Accord. All the tests were fine but then after night it can go flat. I've done some tests by disconnecting it for the night and measuring the current when car is in standby mode - as far I remember I've seen like 150mA which was reasonably OK. After all I've bought new. battery and are problems have disappeared. Lesson from that story - you can really reliable test battery with the load test. Buy the meter and check the current if low just buy new battery. Additionally don't forget it is getting colder now. My battery was fine up until it dropped below 5C at night.

I've found very good video: It got battery meter and power displayed so we know what is happening. We can see car is accelerate with the battery assistance at 250KW. Then he brakes and accelerate again with battery deplated at 220KW - you can compare the difference if you want. Then at 155mph it hit the limiter - observer that speedo is showing 260kmh which is 161mph. So limiter is set to the real 155mph. At that time power output is dropping to 190KW (255bhp) and is stable engine only output. That means if limiter weren't there engine still got like 40bhp to get extra 10-20kmh.

You missed the main point: This of course makes the assumption that the engine has sufficient power which it does not. Britprius is not saying it will do 200mph but if you will put 5L engine with 500bhp and leave the gearbox it should go up to 200mph without reaching crazy rev like 15k rpm. Of course don't try to do that as gearbox also got limits on the max torque not just rpm :) As for sustained max speed it just mean limit is not on the gearbox side but on the engine and battery.

As far I remember while I was doing max speed which I assumed was 155mph speedometer was showing almost 160. There is also one more benefit of showing you that you are going faster - consumption. If car thinks it is going faster then it assume too that it travel further which then influence fuel consumption indications. It is always better to burn 10L of petrol and do 150km rather than 140km :)

Do 155mph in Surrey and you will finish on the first page next morning as bloody maniac :) In my case it was between Leipzig and Dresden which was perfectly fine with everyone and acceptable.

My estimate would also be in 170mph (indicated) area. But then we need to remember max speed is not going to be sustainable as when (very quick) battery will get depleted we will lose 50bph. For my needs 155mph is enough but I got one stubborn A8 (also limited I guess) on my tail and this few extra mph would be nice :)

That is also an option :)

Honda got the same approach. My previous Accord with adaptive cruise control was showing me the speed and indicating the presence of the car in front. Versions with standard cruise control were showing anything extra. Lexus got it on the same way so maybe it is some Japanese custom :)

I can add some personal experience. When you are maxing car out (155mph) there is no usage from the battery and you can drive it at that speed as long as you got petrol in tank :) Some energy will be taken from the batteries during the acceleration but car will accelerate without it too - just a little bit slower I assume. Additionally at that speed any braking is charging batteries really quick. In my case driving at 155mph in normal DE traffic keep batteries topped up for whole time.

In my previous Accord maintenance system was dynamic. It means the car was telling you when you need to change the oil based on many parameters. So sometimes it was every 8k and sometimes every 12k. That system was also covering different parts too - like filters, gearbox oil, plugs etc. It was very convenient and clever. I was surprised that Toyota/Lexus don't have it.

Are they occurring even while you are cruising at the same speed ? If so it must be something with wheels. Check tyres/rims conditions, do balancing, if possible swap wheels with someone and check.

Original post was about 2010 model. For those models only option is a dealer with the "special tool". aditionally I got mixed feeling about legality of updates from that site.

I've just found on eBay that there is roof rack by lexus for £200. that might be good approach as it can work with both bike and boxes. anyone know what load roof is capable of ?

I've checked the roof and there is no provisioning for any type of rails. If one do exist they must be mounted via door cut out which is no the best option.

I don't remember to see them there but I can double check.

Hi everyone, As I can only squeeze one bike on the rear seats I'm looking for other option to transport bikes on the car. I don't have tow bar or roof rails so option are getting pretty limited. I've found the following product: http://www.carbicyclerack.co.uk/saloon-car-bike-racks/lexus-gs-bike-rack/ It does look pretty solid and pricy :) does anyone seen that on the car or even better used ? im looking to transport 2 adults bike plus in year or 2 extra kid bike. it should fit both my current 2010 model and ideally 2015 when I'll change in a year or 2 oh there is even more expensive version: https://www.evanscycles.com/saris-super-bones-3-bike-rack-EV275983?esvt=55104-GOUKE2266114&esvq=&esvadt=999999-0-1217580-1&esvcrea=189744656548&esvplace=&esvd=t&esvtg=pla-298604901548&esvo=EV275983-NA-BLK&esvaid=50080&gclid=EAIaIQobChMI-6-fnv2t1QIVzbvtCh1pvQi-EAQYAyABEgLeFPD_BwE

Filter is probably inside like in the ZF transmission. if so you would need to remove the oil pan which more work and parts. ive changed my transmission oil at 90k miles and schedule next for 150 if I'll still own the car. My was done by Lexus dealer. They are happy to do it even it is lifetime / warranty time :)

There is a thread here about the pump. Pump was the weak point of the system and was dying quite recently. When Lexus noticed it, new version was introduced - 2008 if I remember correctly - and since then it was alright. They changed it once again in 2010 for some reason but my version is also holding strong. another general rule: I know it is tempting to buy early version of a new model but it is much wiser to stick to a last years model of a previous one with all the bugs fixed :)

Recently I was servicing my car at Lexus dealership. During conversation they told me one of theirs customer got GS450h with 300k miles on the clock and then batteries gave up. Important point is though that for batteries miles doesn't really maters but number of cycles. So if you are doing a lot of motorways miles you can do 300 miles without even going through one charging cycle, while driving in the city you can do few cycles just while doing few miles. In general I would prefer a car with high motorways miles rather than daily commuter/school run car as everything is getting used quicker - miles is not the ultimate live counter of the car. Cars should have hours counter for the engine and cycles for batteries ;)

Don't forget that Gs450h got both direct and indirect injectors so whole system got extra complexity. i always though that hybrid system would be the bigger challenge for the lpg ecru to handle with the constant change of the engine state.

For the roughness. I wasn't very happy about my idle too. It wasn't shaking a lot but I could fill it on red light. also driving around 20mph wasn't 100% smooth. I blamed both for slowly dying spark plugs or air filter. case is I was right. I just done my 120k service with new plugs and filters - all the roughness is gone :) as you are also in my area mileage area you may want to look at spark plugs and filters. if plugs are really bad you may not burn all the fuel in cylinders and killing cat.

Yes I know techstream - that why a gave it to lexus garage :) it is still very rare maitanance so I can pay. in general I think it was just over £150 with oil.

There is no easy fill plug. ive asked lexus garage to change it in mine and they done it without problem but I don't know exactly how.