Herbie

All very good points Len. The ceramic coating is a very good idea and one that I may well use myself

I know what you're saying Len but with the greatest of respect, you're overthinking it. A hard-wired installation with parking mode needs, at most, three wires - an ignition-switched supply, a permanent supply and an earth. If something goes wrong, using a multimeter you would check the voltages at the camera end and if something was wrong then it's the installers problem (unless there's something wrong upstream of where the camera's tapped in and then it's a Lexus problem). If they check out alright then anything else has to be an equipment problem so you go back to the camera supplier. I do agree that if something were to go wrong then it would be easier for one place to deal with it all. The only point I'm trying to make is that some people seem to think that because it's a Lexus car then the only camera they can fit will have to be the Lexus one and that's just plain wrong. For a start, it's not made by Lexus and it's not even the best camera out there. I'm not saying that the one I have is the best but it is equally as good as the Lexus offering and at half the price too.

Sorry, as the 'merkins would say, "My bad." I was getting my shafts mixed up

Just for kicks I decided to try WBAC. We paid £32,995 for our 2018 RX450h Luxury in March (currently 26,525 on the clock) and they reckon £31,280 now.

The camera itself is overpriced, as is the Lexus fitting charge. I got this Viofo A129 Duo front/rear camera set from Amazon for £154.70 Just need to buy a hard-wire kit for an extra £10-£12 and it does everything the Lexus-supplied one does for half the price and equally good. It's a very easy DIY job for the front camera and a bit more involved for the rear one but still very DIY-able. If you don't want to DIY then a good auto-electrician will have both done in an hour, again for much less than Lexus would charge.

Because it's electric and driven by motors so they don't have driveshafts.

If you're hoping to get some sort of warranty from Lexus then you'll need to stick to the Lexus servicing schedule of 10k miles or 12 months, whichever comes sooner and you'll have to have done whatever it says you should have done.

Give us a link to it and we'll see what's what. I've heard bad reports of the "Tesla-type" screens, so I'm wondering if you're looking at one of those?

I very much doubt it, to be honest. Trying to find a parasitic drain can be time-consuming and frustrating but the video below is the best method I've ever seen:

You can download the owners manual from https://www.lexus.co.uk/owners/about-my-lexus/manuals/#manuals-form

I'm afraid that five minutes a week is nowhere near enough. At the beginning of the first lockdown, the advice on Toyota's website was to put the car in Park and READY mode for about 60 minutes per week minimum (but don't leave it unattended as someone could drive away in it) to keep the battery charged up. The petrol engine will start up as and when needed during that time to keep it charged.

No, but I did fit switchback LEDs that serve a dual purpose of turn indicator and DRLs:

I don't know anyone who has the type you linked to so I can't answer your question but I do have one of these in the car for emergencies However, I also have one similar to this in the garage I got mine from Aldi for about £89.99 but it was a few years ago. It comes in handy for lots of things and I think they're great value.

Probably just the 12V battery going to battery heaven. Using a multimeter check against the chart below for 'standing' voltage at the battery terminals. Then put the car into READY mode and check again, you should find about 14.5V this time - if so, the charging circuit is working but the battery isn't able to hold charge.

Good points Rob. Your second and third points are related in that when set to auto, the Climate Control will automatically vent at high level first for that very reason. Also works the other way too; on cold days the system will vent air from low level first so that the hot air rises and warms the cabin quickly.

No idea, but if batteries are needed now then why wait for a service? Either look in the manual or take the cover off the fob to see what's in there now and buy a strip of five for about £3.50 at https://cpc.farnell.com/ To be honest, no dealer has ever offered to change my key batteries and I've never asked for them to do it either.

No, that's normal and as it says, it's telling you that the passenger airbag is on and ready to save a passenger's life. If you ever put a baby seat on the passenger seat then the airbag should automatically switch off, thereby preventing harm to the baby.

Yes, very normal and very welcome. This is the regenerative braking, where the motor spin direction is reversed and it becomes a generator, so that the kinetic energy that would usually be lost as heat due to the friction caused by braking, is instead used to generate electricity to charge up the high voltage traction battery.

Thanks Steve

Because it's a Lexus main dealer and they all charge astronomical fees, just because they can Because it's a Lexus main dealer and instead of replacing the seat rail they'll probably replace the whole seat I think I'd probably take it to a local independent garage and see what they say, maybe look for a used seat (or rail) at a breakers?

You don't need to copy it Dave. Just click on the 'Choose File' link as if you were posting a photo to the group and select the PDF file instead of a photo.

No, you're not losing it Brian. The info was in the Owners Manual for each generation before it but for some reason, they don't include it for the 4RX, ie, 2016 onwards. I can't come up with anything after 2015 via Google either, so I think the only way you/we can find out is to pay for an hour or two access to the official workshop manual. I don't know how much it costs but on the upside, you can print out as much as you want while you have access. Have a look here, probably the 'Electrical Wiring Diagrams' you need - https://www.lexus-tech.eu/Menu/Repair

Aha, fair enough

So, they just randomly decide to run a cable in your car without asking your permission or even asking if you want it???

I never, ever, turn off the aircon, especially these cars where they have Climate Control rather than standard aircon. Simply set the cabin temperature to what you want and the car does what it has to to keep it there for you. As Paul says above, almost certain that the seals have dried out and let the gas escape. I will say though, that under normal circumstances unless there is a fault, there is no need whatsoever to have the AC system "serviced". It's a sealed system, the gas and/or lubricating oil do not wear out and as long as they don't escape through a fault, the AC will be just fine. All my cars over the last 30 years or more have had aircon and not a single one of them has ever needed an aircon service. They've all been just as icy cold on the day I sold/scrapped them as when I bought them 5 or 10 years earlier.