Power transfer unit (PTU) overheating/failure on AWD models.
Inspect · Ask about PTU fluid service; listen for whine and check for leaks.

What the known faults on this Ford Explorer typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
The single priciest documented job on the 2016–2019 Ford Explorer is head gasket / cooling system repair at £900–£2,600. Few cars need every repair listed here · treat £2,180–£6,850 as the full exposure if one arrived with all of them.
Power transfer unit (PTU) overheating/failure on AWD models.
Inspect · Ask about PTU fluid service; listen for whine and check for leaks.
Internal water pump on the 3.5L NA V6 (behind the timing cover).
Inspect · Check coolant loss history — replacement is labor-intensive.
Exhaust fumes/carbon monoxide entering the cabin (subject to investigation and TSBs).
Inspect · Smell for exhaust odor under acceleration with the AC on recirculate; confirm any sealing TSB.
Harsh or delayed shifts.
Inspect · Test-drive for smooth engagement.
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.