2016 HYUNDAI EQUUS

Typical onset: 60,000-120,000 mi

Symptoms: Metallic knocking or ticking from lower engine block, especially cold start, Check engine light with low oil pressure codes (P0520, P0521), Metal shavings or glitter in oil during changes, Sudden catastrophic failure with grinding noise and immediate loss of power

Fix: Complete engine replacement or full rebuild required. Connecting rod bearings and main bearings fail due to manufacturing debris left in engine block from factory. Some engines qualify for extended warranty or recall coverage if knock sensor software update was performed. Full rebuild: 30-40 hours labor. Long block replacement: 18-24 hours.

Estimated cost: $8,000-15,000

Typical onset: 70,000-110,000 mi

Symptoms: Transmission fluid dripping from front of vehicle near radiator, Pink or red fluid puddles in driveway, Transmission overheating warning or limp mode, Burnt transmission fluid smell, Harsh shifting or slipping if fluid level drops significantly

Fix: Replace transmission cooler lines and fittings where they connect to radiator. If leak went unnoticed and transmission ran low on fluid, internal damage likely occurred requiring transmission rebuild or replacement. Cooler line replacement alone: 2-3 hours. If transmission damaged: add 12-16 hours for R&R and rebuild.

Estimated cost: $400-800 (lines only), $4,500-7,000 (if transmission rebuild needed)

Typical onset: 80,000-120,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible engine/trans movement when accelerating or braking hard, Transmission shifter feels loose or notchy

Fix: Replace hydraulic transmission mount. This is a fluid-filled mount that deteriorates and leaks. Requires supporting transmission from below while replacing. 2-3 hours labor.

Estimated cost: $350-600

Typical onset: 90,000-140,000 mi

Symptoms: Hard starting after sitting overnight, Rough idle and stumbling under acceleration, Check engine light with fuel trim codes (P0171, P0174), Loss of power especially under load or highway speeds

Fix: Replace in-tank fuel filter and pump assembly, inspect fuel lines for contamination. Filter is not serviceable separately—entire pump module required. Tank must be dropped. 3-4 hours labor. If fuel injectors also contaminated, add injector cleaning or replacement.

Estimated cost: $800-1,400

Typical onset: 70,000-110,000 mi

Symptoms: Burning 1+ quart of oil per 1,000 miles, Blue smoke from exhaust on startup or acceleration, Fouled spark plugs causing misfires (P0300-P0308), Carbon buildup visible on tail pipes

Fix: Related to the same manufacturing defects as bearing failures. Requires cylinder head removal and piston/ring replacement on affected cylinders, or complete short block replacement if cylinder wall scoring present. Valve seals should be replaced simultaneously. 24-32 hours for top-end rebuild with pistons and rings.

Estimated cost: $6,000-10,000

Typical onset: 100,000-150,000 mi

Symptoms: External coolant leaks at head/block interface, White smoke from exhaust (coolant burning), Overheating especially under load, Milky oil on dipstick or oil cap, Bubbles in coolant reservoir when running

Fix: Remove both cylinder heads, resurface if warped, replace head gaskets and head bolts (TTY type). Check for cracks in heads or block. On V8, both banks typically done together. Resurface heads adds machine shop time. 20-26 hours labor for both sides including machining wait time.

Estimated cost: $4,500-7,500