1995 NISSAN 240SX

Typical onset: 100,000-150,000 mi

Symptoms: Overheating under load or in traffic, White smoke from exhaust or milky oil, Coolant loss with no visible leaks, Rough idle and misfires after warm-up

Fix: KA24DE runs hot and plastic radiators crack, thermostat housings leak, and water pumps fail—often unnoticed until head gasket blows. Full job includes radiator, thermostat, water pump, hoses, and head gasket. 10-14 hours labor for head gasket alone if caught early; full cooling refresh adds 3-4 hours.

Estimated cost: $1,200-2,800

Typical onset: 80,000-120,000 mi

Symptoms: Clunking on acceleration or deceleration, Excessive shifter vibration at idle, Difficulty engaging gears smoothly, Visible transmission sag when inspected from below

Fix: Rubber transmission mount deteriorates and allows excessive drivetrain movement, causing clunky shifts and stress on driveshaft. Replace mount and inspect cross-member bushings. 1.5-2 hours labor.

Estimated cost: $180-350

Typical onset: 90,000-140,000 mi

Symptoms: Sputtering or cutting out under hard acceleration, Hesitation at highway speeds, Difficulty starting when hot, Check engine light with lean codes

Fix: Fuel filter clogs (often overlooked maintenance), fuel pump sock screens up, or injectors gum up from sitting. Replace in-line fuel filter, drop tank to clean pump screen or replace pump assembly, and service injectors. 2-4 hours labor depending on scope.

Estimated cost: $300-850

Typical onset: 120,000-180,000 mi

Symptoms: Rod knock or bottom-end rattle on cold start, Excessive oil consumption (quart every 500-1000 miles), Blue smoke on startup or deceleration, Low compression across multiple cylinders

Fix: KA24DE is robust but these cars see hard lives—drifting, money-shifts, deferred oil changes. Requires short block rebuild or replacement with new bearings, rings, pistons if scored. 18-24 hours labor for in-car rebuild; often cheaper to swap in low-mile JDM engine.

Estimated cost: $2,500-5,000

Symptoms: Wandering or twitchy rear end at highway speeds, HICAS warning light illuminated, Clunking from rear suspension over bumps, Uneven rear tire wear

Fix: Four-wheel steering system (optional) has hydraulic lines that leak and pumps that fail. Most enthusiasts delete the system entirely and install lockout bar, converting to standard steering. Delete kit install: 2-3 hours. Repair with OEM parts often not cost-effective.

Estimated cost: $200-450 (delete kit), $1,200+ (OEM repair)

Typical onset: 100,000+ mi

Symptoms: Rear-end clunking over bumps or on throttle transitions, Vague or wandering feel in corners, Excessive wheel hop during hard launches, Visible cracking in rubber bushings

Fix: Subframe bushings and differential mounts turn to mush over time. Replacement with OEM rubber or polyurethane upgrades tightens handling significantly. 3-5 hours labor for full subframe bushing refresh.

Estimated cost: $400-800