Well, over the years (and miles) I’ve had several of the “low coolant warning” faults. I think I’ve been down the faulty sensor repair a couple of times - usually for small, for Land Rover, costs. In every case, the reservoir was visibly full - so the diagnosis aligned with the evidence. Recently, after racking up 127k miles, the light for low coolant came on and I assumed it was once again a faulty sensor. I figured at some point, I should just ignore the warning an “penny jumper over the breaker”. I’m glad I didn’t.

Turns out, all my coolant was missing. I refilled it and within 3 weeks, it all went missing again. So, after 127k miles of ownership, I had to have the coolant leak repair done for about $2k. That’s an expensive fix, but if I get another 127k miles out of it before it happens again, maybe not so bad.

I’ve read a lot about coolant leaks on this forum. I don’t know where the magic failure point is, but I guess you can add me to the list of folks who have had to make that repair. 2020 Defender SE, P400, 127k miles.

 

Where was the leak coming from?

Reservoir, turbo o-rings, cap, water pump?

 

I’ll check the paperwork tomorrow and post back.

 

At the cost of $2k in repairs, it appears that a water pump was replaced. Curious to see your paperwork.

 

One coolant leak over 127K miles isn't bad. I had 3 coolant leaks repaired on our 2023 in the first 5K miles. Turbo o-ring, lower radiator hose and somewhere on the upper engine block. Totally surprised by these as I thought coolant leaks were nearly extinct. At least they were on the vehicles in our family motor pool over the last 20 years.

 

I had a 2023 Defender P400 and it went to the dealership 4 times for low coolant messages, and they finally found a tiny leak in the water pump.