2003 INFINITI I35

Typical onset: 80,000-140,000 mi

Symptoms: Grinding or whining noise during acceleration or turning, Vibration through steering wheel under load, Visible metal shavings in transaxle fluid, Loss of power transfer to one or both front wheels

Fix: Front differential bearings and gears wear prematurely in the transaxle case. Requires full transaxle removal, case splitting, and diff rebuild with new bearings, seals, and often ring/pinion set. 8-12 labor hours. Many shops won't touch it—easier to swap a used transaxle, but used units often have same wear.

Estimated cost: $2,200-3,800

Typical onset: 100,000-150,000 mi

Symptoms: Clunking over bumps from front end, Steering feels vague or 'floaty' on center, Visible cracking or tearing in rubber subframe bushings, Uneven tire wear on inside edges

Fix: Front subframe bushings deteriorate and the subframe itself can crack at stress points. Full subframe drop required to replace bushings (6-8 hours), crack repair may need welding. Alignment mandatory after. Polyurethane upgrades available but transmit more NVH.

Estimated cost: $1,200-2,400

Symptoms: Dashboard surface becomes sticky or melted texture, Peeling vinyl on door panels and center console, Headliner sagging in rear, especially near rear window, Carpet edges pulling away from sill trim

Fix: UV and heat degrade the soft-touch plastics Infiniti used. Dashboard requires full removal and re-cover or replacement (10-14 hours for dash), headliner re-glue is 4-6 hours. Many owners live with it. Aftermarket dash covers are $200-400 DIY option.

Estimated cost: $800-2,500

Typical onset: 120,000-180,000 mi

Symptoms: AC blows warm intermittently, then stops cooling entirely, Oily residue or wet carpet on passenger side, System won't hold refrigerant charge, Musty smell from vents even after cabin filter change

Fix: Evaporator core corrodes and leaks refrigerant. Entire dash must come out for access—this is a 12-16 hour job. Includes evacuate/recharge, new expansion valve recommended while you're in there. Labor kills you on this one.

Estimated cost: $1,800-3,200

Typical onset: 90,000-140,000 mi

Symptoms: Power steering fluid leak at inner tie rod boots, Groaning noise when turning at low speed, Intermittent heavy steering effort, Fluid level drops repeatedly despite top-ups

Fix: Rack seals fail, sometimes rack develops internal scoring. Replacement rack required (used units often no better). 4-6 hours labor, includes alignment. Aftermarket racks available but quality is hit-or-miss—OE remanufactured preferred.

Estimated cost: $900-1,600

Symptoms: Visible rust perforation on steel brake lines along subframe, Soft or spongy brake pedal that doesn't improve with bleeding, Brake fluid leak visible at line connections or mid-run, Brake warning light with confirmed fluid loss

Fix: Steel brake lines rust through in salt states, especially along rear axle and front subframe runs. Complete brake line replacement (all four corners) is safest approach. 6-8 hours with pre-bent line kit, longer if custom flaring required. Inspection-failure item.

Estimated cost: $800-1,400

Symptoms: NHTSA recall notices for passenger airbag inflator, No symptoms until deployment—then risk of metal shrapnel, Airbag light may or may not illuminate

Fix: Two recalls for passenger-side Takata inflators. Dealer replacement is FREE but parts shortages meant years-long waits. Verify recall completion before purchase—check VIN at NHTSA.gov. Non-negotiable safety issue.

Estimated cost: $0