ExhaustHigh
Exhaust fumes/carbon monoxide entering the cabin (subject to investigation and TSBs).
- Typically appears
- Any
- What to inspect
- Smell for exhaust odor under acceleration with the AC on recirculate; confirm any sealing TSB.
2016–2019 Ford Explorer — common problems & known faults
The fifth-gen Explorer is a roomy family SUV, but exhaust-odor concerns and the PTU/transmission are important checks.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed July 2026
Known faults to check
DrivetrainHigh
Power transfer unit (PTU) overheating/failure on AWD models.
- Typically appears
- 70,000+ miles
- What to inspect
- Ask about PTU fluid service; listen for whine and check for leaks.
TransmissionMedium
Harsh or delayed shifts.
- Typically appears
- Any
- What to inspect
- Test-drive for smooth engagement.
CoolingHigh
Internal water pump on the 3.5L NA V6 (behind the timing cover).
- Typically appears
- 90,000+ miles
- What to inspect
- Check coolant loss history — replacement is labor-intensive.
Inspecting a Ford Explorer?
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Generate a free checklistFrequently asked questions
Is the Ford Explorer safe from the exhaust issue?
Many were addressed by TSBs — smell-test on a drive and confirm the fix history before buying.
What is the PTU problem?
The AWD power transfer unit can overheat and fail if its fluid isn't serviced; ask about maintenance.
Which engine to choose?
The 2.3L EcoBoost and 3.5L are common; note the NA 3.5L's internal water pump when high-mileage.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.