dezufo

Nice one, it would be easier than stripping down and refitting a disc, thanks for the link I have put it in my wish list in case mine packs up

Yes it alerts you when you drift out of the lane

Is it the lower plastic trims that you are referring to?

Check out Autodoc and eBay or Amayama.com. Gates are a good quality belt then there is also Blueprint or Febibilstein

ebay will most likely have some 2nd hand boxes, for the price of a box from Toyota you could get a cat back stainless steel system

Could be a dirty throttle body or MAF sensor, you can get MAF spray cleaner on eBay or Amazon. If you have recently changed ethanol rating fuel the ECU has to relearn the idle mix so will take a while to settle

You could try a reset as per the pic. Look on eBay or Amazon for an owners manual, it has loads of useful info

The 2.4 does have issues with the bolts at the rear of the head working loose so if you are lucky that could be the problem. A replacement engine would be expensive, upwards of £1500. If your engine did not seize up then it would be far easier and thus cheaper to have a new gasket and the head skimmed especially if your mileage is fairly low for the year, and you know the service history

Dirty sensor does not read the true air flow. It is in the air intake of the manifold you can get spray cleaner off eBay or Amazon do not try wiping it as you might break it

Try cleaning the MAF sensor, see if that improves it

The cigarette fuse is a 15amp so if it is blowing then it is obviously being overloaded. To access the fuses you have to remove the glove box and lower kick panel, then you have to lie in the foot well and look up and to your left, you will need a torch and a pair of long nose angled pliers

Check how tight the pop top seals fit onto the roof. The only drainage system is when a front sunroof and a rear moon are fitted, they are removed when a pop top is fitted

There are 2 types of clips, the clips at the top slide into a channel and the lower clips attach to the trim then push fit into the bodywork, both available on eBay, lower clips = https://www.ebay.co.uk/itm/291731628038 top clips = https://www.ebay.co.uk/itm/316552651067

Lane control is standard and just monitors and warns that you are drifting, it can be switched off on the dash. Cruise control does not come as standard, but it is easy to add to any post 2005 as the wiring & ecu etc are already fitted, and you just fit the control stalk, costs about £20. Radar cruise has a sensor behind a clear cover built into the front bumper so that is a giveaway. The TEMS suspension has 3 settings, sport/normal/comfort and is good but if the shocks start to leak then it works out expensive to replace them, I had a fail on the mot due to both rear shocks leaking, I fitted standard shocks and left the fronts set on normal, have not noticed any difference when driving, but I tend not to race it anyway. Nearly all owners remove the original head unit as it is all in Japanese and the radio frequencies are different as well as the satnav. Steer clear of the pearl white as they have a peeling problem

As said by James, the drain holes in the sunroof channels get blocked and the water then overflows,

The outer plastic covering of the drive cable cracks, due to age, then jams in the mechanism inside the door. If you cut the cable it will release the tension then you can operate the door manually. Replacement cable/pulley system is available on eBay https://www.ebay.co.uk/itm/354878093116

As it is not being felt via the steering, then the problem has to be at the rear, so the most obvious would be wheel balance or worn rear axle bushes or wheel bearing or buckled wheel

Genuine Toyota oil from eBay https://www.ebay.co.uk/itm/383571542591

You can change the LEDs for white ones, look on eBay

My odometer 2003 is in KM, to ensure the tester does not enter it as miles either tell him or do what I did and put a sticker on the speedo saying "Odometer registers in Kilometres". Check the certificate when you collect it to make sure it has been entered as KM as some testers have been known to enter the reading as miles or convert the reading into miles, both are wrong, they then tell you that it has to be in miles but all they have to do is write km where it says Mileage

Cat part number is; 25051-28170, see link; but you could try some catalytic cleaner first to see if that improves the emissions https://www.amayama.com/en/genuine-catalogs/epc/toyota-japan/alphard/ANH10W/35720/engine/1701

Ingenious idea for the front seat, How old is the GSD?

If you are losing a lot of water via the pump, then you must have quite a big leak which would be obvious as there would be a puddle under the offside of the engine. There are 2 possible areas of major leaks. 1) Some radiators have plastic sides, these are prone to cracking due to age & heat. 2)There are 2 hoses, flow & return, that connect to the heater matrix these have plastic T piece connectors that are prone to cracking due to age and heat, they can be replaced with brass barbed 19mm equal Ts. See link for the pump part number, plus other parts, then use as a cross-reference on eBay https://www.amayama.com/en/genuine-catalogs/epc/toyota-japan/alphard/ATH10W/43189/engine/1601

the cable is not available separately, but the assembly is available on eBay, https://www.ebay.co.uk/itm/354878093116 there are videos on youtube showing how to do it

I have seen people getting Dryrobe seat covers for their Alphards. I use a large cotton dust sheet, on the floor, as it soaks up wet/dirty paw prints but then my dogs have separate cages where the 3rd row of seat used to be, they are too big to sit on the seats