Hi Jim,
I lurked on Elgrand forum for 3 years before buying an Alphard instead....think I know your name from there?
Estima is similar to Serena as in smaller version of big brother.
There seems to be mixed reviews about 2nd hand hybrid reliability, though hopefully Hybrid owners will chip in and allay that.
I have 7 seater 3 litre v6 gen 1 facelift from 2005. If it was 2006 it would be ulez comp.
It should be anyway as the emissions are well under, but the cut off is 2006.
I get 24-28 miles to the gallon depending on foot down or not. 340 miles from brim to warning light on 60 litres leaving 10 in reserve every 10 days. I only use posh fuel.
I've done about 50k since buying, and it's been great.
No Cat issue to worry about.
Stereo will need replacing to get rid of Japanese, but buttons are marked in english apart from toll reader. New stereo means you lose front and side cameras but not rear with a specific cable. I believe you can keep front cameras too with a considerably pricey cable and head unit.
You can get a speedo chip behind binacle to convert both odo and speedo to mph.
Mine has many options already as it's the mz v spec including most of the things you mentioned in your other thread.
All the electrics are sound as are the bodywork and mechanicals. it's better than most cars I've ever been in and still puts a smile on my face after almost 4 years of ownership, though I'm starting to get a few creaks and rattles from the rear seats and doors over Very rough roads.
Hopefully this completely biased report helps