2021 FORD F-150 RAPTOR

Typical onset: 30,000-80,000 mi

Symptoms: Sudden knocking or rattling from engine bay, Metal shavings in oil during changes, Loss of oil pressure warning, Complete engine seizure in worst cases

Fix: Rod bearing failure typically destroys the crank, block, and pistons. Requires complete engine rebuild or short block replacement. 25-35 hours labor depending on ancillary damage. Ford has issued TSB 21-2381 addressing this but many owners still experience failures outside warranty coverage.

Estimated cost: $12,000-18,000

Typical onset: 40,000-90,000 mi

Symptoms: Excessive oil consumption (1 quart per 1,000 miles or worse), Blue smoke on cold start or under load, Loss of compression in one or more cylinders, Misfires and rough idle

Fix: The high-output twin-turbo setup runs aggressive boost and timing. Detonation or poor-quality fuel can crack piston ring lands. Requires full teardown, new pistons, rings, and typically machine work on cylinder walls. 30-40 hours labor for proper rebuild with updated pistons.

Estimated cost: $10,000-16,000

Typical onset: 50,000-100,000 mi

Symptoms: Transmission fluid leaking near radiator or front of truck, Burnt transmission fluid smell, Transmission overheating warnings on dash, Erratic shifting when fluid runs low

Fix: The 10R80 transmission cooler lines and cooler itself develop leaks from vibration and heat cycling. Lines crack at crimp points or cooler develops pinhole leaks. Replace cooler and both hard lines as a set, flush system. 4-6 hours labor.

Estimated cost: $800-1,400

Typical onset: 60,000-120,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive driveline vibration at idle in gear, Visible sagging or tearing of rubber mount, Harsh engagement during shifts

Fix: The Raptor's power output and off-road abuse accelerates transmission mount deterioration. The 10-speed's quick shifts also stress mounts. Replace transmission mount and inspect transfer case mount at same time. 2-3 hours labor.

Estimated cost: $400-700

Symptoms: Hard starting or extended cranking, Hesitation or stumbling under acceleration, Check engine light with fuel trim codes, Low fuel pressure readings

Fix: The high-pressure direct injection system is sensitive to fuel quality. Contaminated fuel or degraded in-tank pump strainer causes pressure drops. Fuel filter is integrated into pump module in tank. Requires tank drop, pump module replacement. 3-4 hours labor. Often see this after getting bad fuel or using contaminated jerry cans for overlanding.

Estimated cost: $600-1,200

Typical onset: 50,000-100,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Overheating under load, Rough idle and misfires, Oil contaminated with coolant or vice versa

Fix: Usually follows unresolved detonation issues, aftermarket tunes, or boost control problems. Both heads come off, machine work to verify flatness, new gaskets and head bolts. Address root cause (carbon buildup, wastegate issues, bad fuel). 18-24 hours labor plus machine shop time.

Estimated cost: $4,500-7,500