We had that a few years back.

Have you now replaced it with a bolt and nylon lock nut? If so it's no worse than factory, the nut is welded on for quick assembly. Tight will do it, maybe your torque wrench is no good?

We have a Foxwell and it seems to read live data well on the TD5, not that I understand half of it. Used it to diagnose MAF sensor and 3 Amigos. It's also usable for codes on other OBD2 vehicles. Like you say a Nanocom is more in depth but also a lot more expensive.

Probably

Usually alternator which loosens off, we don't have an issue with the pump pulley.

200tdi?

Gearbox/engine lower stabiliser mount if it has one?

Solution would be to replace it. Take the belt off and inspect, physically.

I don't have a Freelander but that looks like radiator hose and possibly intercooler hose beneath it.. Radiator hose would leak coolant, intercooler hose would be noisy and down on power.

We are glad you didn't steal it, alot get stolen over here. Hopefully you get it fixed and reply with the outcome.

Well done. What junction box are you talking about? Maybe post some pictures to help others in the future.

Leak appeared first 🤣

Land Rovers are in a league of their own for breaking down without even moving. Son's 200tdi has decided it wants a fuel pipe leak now for no reason whatsoever.

Can you cut the nut off and replace with a lock nut? You need proper rated bolts not Chinese rubbish made from margarine, 10.9 or whatever they are.

I watched a video on that not so long ago. There is some sort of mod you can do also if you feel inclined to do so. https://www.ebay.co.uk/itm/183965760614 Think that is the kit, what it does I can't remember but apart from that it looks like it's just an o-ring you need.

How is it £800 to change the oil?

Used them on a Defender. They send a new remote and dongle you plug into the obd socket, it codes the new remote to the car. You didn't need the original fob when you coded it.

I could be wrong but I don't believe the high level brake light is relevant. It's very strange that you have 12v into the bulb holder and a good earth and it still doesn't work.

That is where my son's 200tdi temp gauge sits. The important thing is to know is the hot temp position and it doesn't get any hotter. Capillary gauges are good.

Steam cleaner?