Two redesigns, opposite launches: one shipped into a recall storm, the other reused a sorted drivetrain and stayed quiet.

The 2020's most serious pattern is a set of driveline defects that can let the truck move when it shouldn't. A driveshaft can fracture along its weld seam on AWD ten-speed cars (recall 20V-693); a rear-axle horizontal mounting bolt can break and disconnect the driveshaft (23V-675, with software fixes 23V-069 and 23V-199); and an unintended powertrain-control-module reset can damage the park system so the truck won't actually hold 'Park.' Owners describe exactly that: 'the transmission shifts into park while driving,' and a 'loud dragging sound underneath' followed by loss of drive. Ford's bulletins (11009831/11006038) document the rear-axle-bolt fracture directly. All are free recall repairs — but on a used car they are only worth anything if they were done. Verify every one of these by VIN.

Sources: NHTSA complaint database, 2020 Ford Explorer · NHTSA recall database, 2020 Ford Explorer

The new ten-speed automatic is the gen-6 Explorer's frequent pain point. An independent mechanic describes valve-body and torque-converter glitches roughly between 40,000 and 80,000 miles, addressed by Ford software updates and recalls. The federal file backs it up: hard 7-to-6 downshift jerks, hesitation, and outright failures — one owner's transmission 'failed at 72,000 miles under normal driving,' another at 83,000 — past the powertrain warranty and on the owner's dime. On a test drive, feel for a jerk on deceleration or a shudder; get a diagnostic scan before buying, and price transmission risk into a high-mileage example.

Sources: NHTSA complaint database, 2020 Ford Explorer · Independent gen-6 Explorer mechanic transcript (ten-speed, 2.3L turbo/coolant costs) + NHTSA manufacturer communications (CSP 19B24; rear-axle-bolt TSBs)

On the base 2.3L EcoBoost four-cylinder, an independent mechanic reports turbocharger failures or coolant leaks on higher-mileage examples 'often costing $1,500 to $3,000 to repair.' Ford also ran a launch-year delivery-hold Customer Support Program (19B24) inspecting the 2.3L balance-shaft and oil-pump assembly on 2020 cars. And recall 19V-687 covers a wiring harness that can rub the A/C pulley and short against battery power — a fire risk on 2.3L/3.3L cars. Watch for coolant loss and confirm 19V-687 was completed.

Sources: NHTSA complaint database, 2020 Ford Explorer · Independent gen-6 Explorer mechanic transcript (ten-speed, 2.3L turbo/coolant costs) + NHTSA manufacturer communications (CSP 19B24; rear-axle-bolt TSBs)

The one gen-four problem the mechanic source calls 'an actual problem': a small servo motor that switches the climate system between fresh and recirculated air can separate and stop working, so the defroster won't clear the glass and you may hear noises behind the dash. The fix is a replacement servo and door; most are covered under warranty, and Toyota is described as good about goodwill coverage if you're just outside it. It can't be fixed preventively — you address it if it appears. On a test drive, run the defroster and toggle fresh/recirc to confirm both work.

Sources: Independent mechanic channel transcripts (Car Care Nut current-Highlander review)

Very-early-build 2020s (bought late 2019 / very start of 2020) can show an RPM flare on the 1-to-2 upshift — the revs jump as if slipping. It is a software calibration issue, not hardware, and a dealer software update resolves it; later 2020 builds and all 2021s are unaffected. The eight-speed itself is the sorted unit here (no 2017-style failures), though it is a busy, downshift-happy transmission by design — test-drive it so its shift behavior isn't a surprise.

Sources: Independent mechanic channel transcripts (Car Care Nut current-Highlander review)

A handful of mostly-2020 cars lost all A/C cooling because a fitting on the condenser wasn't fully clipped during assembly. It's a production item, generally covered under warranty; if the A/C quits entirely, the condenser lines are the first place to look. Low-frequency, but worth a cold-air check on the test drive.

Sources: Independent mechanic channel transcripts (Car Care Nut current-Highlander review)