2006 HYUNDAI AZERA

Typical onset: 80,000-150,000 mi

Symptoms: Metallic knocking or ticking from engine that worsens with RPM, Metal shavings in oil during changes, Sudden loss of oil pressure, Check engine light with low oil pressure codes, Complete engine seizure without warning in severe cases

Fix: This is the notorious bearing defect that affects multiple Hyundai/Kia V6 engines from this era. Connecting rod bearings wear prematurely due to manufacturing debris in crankshaft oil passages. Once knocking starts, you're looking at complete engine replacement or rebuild. Short block replacement is 18-24 labor hours; full rebuild adds another 8-12 hours if heads need work. Many shops won't rebuild these due to liability—replacement with used/reman engine is more common.

Estimated cost: $4,500-8,000

Typical onset: 90,000-140,000 mi

Symptoms: Transmission fluid appears milky or strawberry-colored (coolant contamination), Harsh or delayed shifts, Slipping between gears, Transmission overheating, Complete transmission failure after coolant mixes with ATF

Fix: The internal transmission cooler inside the radiator fails, allowing coolant to mix with ATF. Once contaminated, the transmission is usually destroyed within days to weeks. Requires radiator replacement, complete transmission flush or replacement, and all cooler lines flushed. If caught early (milky fluid, no shifting issues yet), flush and radiator replacement is 4-6 hours. If transmission is damaged, add 12-16 hours for R&R and rebuild.

Estimated cost: $800-1,200 (early catch) / $3,500-5,500 (with transmission replacement)

Typical onset: 70,000-110,000 mi

Symptoms: Clunking noise from rear over bumps, Rear end feels loose or unstable in corners, Uneven rear tire wear on inside edges, Visible cracking or separation of rubber bushings during inspection

Fix: The rear lower control arm bushings deteriorate and separate, causing alignment issues and poor handling. This was serious enough to trigger a recall on some model years. Both sides should be replaced together even if only one is visibly failed. Requires 3-4 hours for both sides including alignment. OEM or quality aftermarket parts recommended—cheap bushings fail quickly.

Estimated cost: $600-900

Typical onset: 100,000-150,000 mi

Symptoms: High-pitched whining or grinding noise from front of engine, Battery warning light illuminates, Electrical system voltage drops below 13V while running, Dimming headlights at idle, Dead battery after short periods

Fix: The alternator bearings fail prematurely, often making noise for weeks before complete failure. Some units fail the voltage regulator instead with no warning noise. Replacement is straightforward at 1.5-2 hours labor. Always load-test the battery afterward—many fail shortly after alternator dies due to deep discharge cycles.

Estimated cost: $400-650

Typical onset: 80,000-120,000 mi

Symptoms: Excessive vibration at idle, especially in Drive, Clunking when shifting from Park to Drive or Reverse, Engine rocks noticeably during acceleration, Visible oil leaking from mount (hydraulic fluid)

Fix: The front hydraulic engine mount fails, allowing excessive engine movement. Creates uncomfortable vibration but won't strand you. Replacement is 2-3 hours—the mount is accessible but requires supporting the engine. Replace the front mount at minimum; if one has failed, inspect all three mounts as they age similarly.

Estimated cost: $350-550

Typical onset: 60,000-90,000 mi intervals

Symptoms: No symptoms until catastrophic failure, Coolant weeping from water pump weep hole (advance warning), Squealing from timing belt area (rare, usually fails silently), Engine won't start after belt breaks, Bent valves after interference engine failure

Fix: Both V6 engines are interference designs—if the timing belt breaks, valves meet pistons and you're rebuilding the top end minimum. Service interval is 60k miles but many owners skip it due to cost. Proper service includes belt, tensioner, idler pulleys, and water pump, requiring 5-7 hours labor. If the belt breaks, add 12-18 hours for valve job on both heads plus whatever else got damaged.

Estimated cost: $800-1,200 (preventive service) / $3,000-5,500 (after failure)