The 2004 I35 is essentially a rebadged Maxima with Nissan's VQ35DE V6—solid powertrain, but this generation suffers from front differential failures, subframe rust in salt states, and annoying interior rattles from the dashboard.
Front Differential Failure (AWD models)
Common · high severityTypical onset: 80,000-120,000 mi
Symptoms: grinding or humming noise from front axle during acceleration, vibration through steering wheel, binding sensation in tight turns, metallic shavings in differential fluid
Fix: Complete front differential rebuild or replacement; requires dropping subframe and removing axles. Aftermarket units available but OEM preferred. 8-12 labor hours depending on rust and fastener condition.
Estimated cost: $2,200-3,800
Subframe Rust and Structural Corrosion
Common · high severitySymptoms: visible rust perforation on front subframe, clunking over bumps from deteriorated mounting points, alignment won't hold, failed state safety inspection
Fix: In rust-belt states, the front subframe corrodes where it mounts to unibody. Repair shops attempt welding/plating but replacement is proper fix—requires full front suspension removal. 12-16 hours labor, plus subframe cost varies wildly (salvage vs. aftermarket).
Estimated cost: $1,800-4,500
Dashboard Rattle and Cracking
Common · low severityTypical onset: 60,000+ mi
Symptoms: persistent rattle from center stack or passenger side dash, cracks forming on dash top near windshield, squeaks over bumps, loose HVAC vents
Fix: Dash components become brittle and mounting clips break. Full dash removal (10-14 hours) needed for proper repair but most owners live with it. Aftermarket dash covers common band-aid.
Estimated cost: $800-1,500
AC Evaporator Core Leak
Occasional · medium severityTypical onset: 100,000-150,000 mi
Symptoms: loss of refrigerant with no visible external leaks, sweet smell from vents, AC works intermittently then stops, oily residue on passenger floor
Fix: Evaporator is behind the dash—requires full dashboard removal to access. Plan on replacing expansion valve at same time. 12-16 hours labor, parts are moderate.
Estimated cost: $1,200-2,000
Power Steering Rack Leaks
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: power steering fluid leaking at inner tie rod boots, groaning noise when turning at low speed, steering feels notchy or sticky, fluid level drops consistently
Fix: Rack seals fail, usually at the pinion input shaft or inner boots. Remanufactured racks readily available. Requires alignment after. 4-6 hours labor.
Estimated cost: $800-1,400
Brake Line Corrosion
Common · high severitySymptoms: spongy brake pedal, visible rust bubbling on hard lines near rear axle, brake fluid leaks at line junctions, failed brake inspection
Fix: Factory steel brake lines rust through in salt states, typically rear lines first. Full replacement with NiCopp or stainless highly recommended over patching. 6-10 hours for complete set.
Estimated cost: $800-1,600
Takata Airbag Inflator Recall
Common · high severitySymptoms: recall notice from Nissan, no symptoms until deployment—then catastrophic metal shrapnel risk
Fix: Passenger-side airbag inflator replacement under NHTSA recall. Free at Infiniti/Nissan dealers but parts availability has been spotty. Check VIN at NHTSA before purchase.
Estimated cost: $0
Solid drivetrain let down by rust-prone chassis and nuisance interior issues—buy only from warm climates or with documented undercoating history, and budget $2k for deferred maintenance.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.