Herbie

No idea but why sign out? I've been almost constantly signed in for years.

You may well be right, I honestly don't know - but there must be some reason why they don't include rear DRLs during the factory build of any car, be that Lexus, Ford, Jaguar or whatever.

I'm no mechanic but you have to weigh the risk against cost of repairs if anything goes wrong and, personally, I wouldn't risk it.

I'm not sure but would say no, simply because it would look like you're pressing the brakes.

I got a set of these switchback white/amber LEDs for my RX300 when I had it and they were great. All it needed was a single 12V relay wiring in and that was easy. Highly recommended if your car is suitable for these.

Not sure I agree with that Malc. Remember that Lexus/Toyota don't manufacture batteries, they just buy them in from people who do manufacture them. This means that they are consciously making a decision to buy low electrical capacity batteries. Higher capacities of, say, 75Ah, 100Ah and even 120Ah are being manufactured and are readily available but Lex/Toy just choose not to use them.

No, no and thrice no. You cannot do any damage by connecting to the negative battery post rather than an unpainted bolt/nut/screw/bracket etc., etc., apart from one caveat. Under certain conditions a battery can emit hydrogen gas and so create a risk of explosion if a spark were to ignite it. This is why the advice is to clip to an earth point away from the battery itself, so that any sparks generated will not be in close proximity to the gas cloud (if there is one*). However, from an electrical point of view, there is no difference whatsoever whether you connect to the battery terminal itself or to some unpainted nut/bolt etc., etc., at the front, back, top or bottom of the car. Not one jot of difference at all. *In more than 40 years of hobby spannering I have never personally seen or heard of an explosion being caused in this way, nor have any family or friends.

It's 'mission critical' because right at the start of the whole process there are a pair of 12V safety interlock relays that have to be operated before access to the hybrid system is allowed. Not enough power to operate the interlock means no car.

That's correct Len, yes. It will fail to start even a hybrid car long before it reaches full discharge.

The need is due to the laws of physics. A 50Ah battery means that it can supply 50A for one hour or 25A for two hours, or 12.5A for four hours and so on. If we assume a brand new and fully charged battery with 50Ah rated capacity and a parasitic drain of 50mA, the time from full charge to full discharge is 1,000 hours or 41.66 days, or 5.95 weeks depending on how you look at it and that's it.

No, but you can get your own back

Smart Tuning fitted it but who made 'it'? Is it a BeatSonic unit, or a Lexion, a Teyes, a RoadTop or a Grom Vline2, or something else altogether?

Lexus navigation is abysmal, which is why there's always lots of talk about Android Auto or Apple Car Play, because of the superior mapping and navigation available. If you really insist on torturing yourself by using the Lexus nav, you can use postcode search on Page 2 of the nav screen.

You need to read the OBD codes (if any are flagged) then tell us what they are. These codes are starting points for further diagnostics and help to point us in the right direction; without them all anyone can do is make random guesses.

Something that no one has mentioned is, what about when it's away from your home address? You can invest in any amount of lockable parking posts and/or other stuff to keep it safe at home but if it ever has to stay away somewhere overnight..... Life is not a rehersal. You get one chance and that's it, so if you want a Lexus go and get one and stop being so paranoid. Enjoy your money while you've got it and can spend it. In a couple of months my wife and I will be doing a road trip to Eastern Europe, something we've been doing annually for our holidays since 1991. We never have any specific destination in mind but we'll be driving and touring around Czechia, Slovakia and Poland. Some hotels will have their own car parks, some won't, and my pride and joy will just have to take its chances being parked on the road. Will I worry or fret about the possibility of it being stolen? Absolutely not.

The negative (-ve) battery post is connected directly to the car body, which means that the whole of the body, ie, panels; screws; nuts; bolts; brackets, etc., at the front, back, top or bottom of the car - as long as they are clean unpainted metal (paint acts as an insulator so you don't want that) - can be considered to be the -ve battery post and any of them will serve the purpose. The only reason why they discourage connection directly to the actual battery post itself is that the battery could give off hydrogen gas and there could be a risk of explosion. Having said that, after more than 40 years of hobby-spannering, neither myself nor anyone I know has ever heard of an explosion actually happening. The main thing to remember is - from an electrical point of view it matters not one iota where you connect the -ve lead to the car and I tell you this as a time-served, fully qualified electrician. When the factory closed down I became a telephone engineer on Post Office Telephones for the majority of my working life. Later on, after a back injury, I became a computer technician and hobby-wise I'm also a licenced radio ham. I'm not trying to be obnoxious, big-headed, or blowing my own trumpet; rather just saying that I've been in the electrical and electronics fields for 50 years and I do have a bit of knowledge on the subject.

That's not the way to use a trickle charger - the clue is in the name. Just as an example let's say that you have a charger that's capable of supplying 5A output. If you connect a flat battery to it, the battery will initially pull all 5A or close to it. As the battery takes charge and returns back to normal values, the charging current reduces, e.g.,when flat it sucks up 5A but by the time it's 90% charged it may only be pulling 0.5A (completely ficticious made-up figures for illustration only). That's how a 'standard' charger works. A trickle charger may only be capable of supplying a maximum of, say, 0.5A anyway. It's meant to be connected and used all the time that the battery is stood idle in order to maintain it in a fully-charged state, so you wouldn't just use it overnight to charge the battery. You would connect it to the battery every time you got home and only disconnect it when you want to use the car. If the car wasn't going to move for two weeks, the trickle charger would be on and connected for all that time.

I fitted a Grom Vline2 unit in my 2018 and it's been good. Other units to look out for are Teyes, Lexion and Beatsonic. Stay away from Carlinkit - in my experience, these are terrible things.

That only turns off the internal ultrasonic sensor. The only way (as far as I'm aware but happy to be corrected) is to use the key and lock the car manually.

It's very easy to install Ronnie, takes about 5 minutes tops. It doesn't drain the 12V battery and one of the sensors even shows current battery voltage. I initially took out the 24 month subscription but I think I'll go for 36 months next time as it means you avoid any price increases. Highly recommended my friend.

If it's got six removable plugs on the top it's wet - you take those plugs out to top up with deionised water. No plugs means it's AGM.

With the greatest of respect George, I'm afraid that most of that is incorrect. For instance, the car needs a good hour or two to go fully to sleep, not just 10 minutes. Also, pulling fuses can cause other (sometimes seemingly random and unrelated) ECUs/modules to wake up and give false readings. The following video shows the best way of doing a parasitic current draw test:

Just sent a PM to you Rob.

A very slight inconvenience but hardly a deal-breaker. I rang my insurance company from the Lexus showroom before driving off in my new pride and joy when we bought this car. All done and dusted in minutes.

Cheers, I didn't know that. Everyday's a school day eh