1998 NISSAN QUEST

Typical onset: 80,000-140,000 mi

Symptoms: Delayed engagement into Drive or Reverse, Harsh 2-3 shift or slipping between gears, Burnt ATF smell, dark brown or black fluid, Check Engine light with shift solenoid codes

Fix: The RE4F04A transmission is a weak point—internal clutch packs and valve body wear rapidly if fluid service was neglected. Rebuild runs 12-16 hours labor; many techs recommend replacement with a remanufactured unit due to core wear. External cooler lines rust and leak, contaminating fluid. Replace transmission oil cooler and flush lines during any rebuild.

Estimated cost: $2,200-3,800

Typical onset: 100,000-160,000 mi

Symptoms: White smoke from exhaust, especially on cold starts, Coolant loss with no visible leaks, Oil milkshake (coolant mixed in oil), Overheating or fluctuating temp gauge

Fix: The VG30E develops external coolant weeps first, then internal failures that mix oil and coolant. Both heads must come off—18-24 hours labor including machining if warped. Often find corroded bolt threads and cracked exhaust manifold studs. If coolant contaminated the oil and drove it, expect bearing damage requiring short block work, adding another 8-12 hours.

Estimated cost: $1,800-3,200

Typical onset: 90,000-130,000 mi

Symptoms: Rough idle and hesitation on acceleration, Coolant smell in cabin or visible leak at manifold base, P0171/P0174 lean codes, Small coolant loss over time

Fix: Lower intake plenum gaskets deteriorate, causing vacuum leaks or external coolant seepage. Upper/lower manifold removal requires 6-8 hours due to tight transverse engine bay. Replace all vacuum lines and PCV components while in there—they're brittle by now. Throttle body cleaning mandatory.

Estimated cost: $650-1,100

Typical onset: 60,000-100,000 mi

Symptoms: Random misfires, especially in wet weather, Hard starting or no-start condition, Intermittent stalling at idle, Check Engine light with P0300-P0306 misfire codes

Fix: The VG30E uses a traditional distributor that collects moisture and carbon tracking. Cap/rotor replacement is 1 hour, but the ignition coil (mounted on distributor) fails frequently and causes identical symptoms. Replace both together. Spark plug wires crack at boots—inspect closely. Total job 1.5-2 hours if doing everything.

Estimated cost: $280-450

Typical onset: 70,000-110,000 mi

Symptoms: Clunk when shifting into Drive/Reverse, Excessive vibration at idle in gear, Engine rocks visibly when revved, Steering wheel shakes during acceleration

Fix: Hydraulic mounts deteriorate and leak fluid, especially the front torque mount. Replacement requires supporting the engine/trans—each mount is 1.5-2 hours, usually do all three at once (6-7 hours total). Collapsed mounts stress CV axles and cause secondary failures if ignored.

Estimated cost: $550-950

Symptoms: Fuel smell under vehicle, Visible rust or wet spots on tank, Fuel gauge erratic or stuck, Fuel pump whine or hesitation

Fix: Salt-belt Quests suffer tank corrosion and rusted mounting straps. NHTSA recall addressed some units, but many have corroded since. Tank drops in 3-4 hours; replace straps, filler neck, and inspect fuel pump/sending unit. If tank is pitted, replacement mandatory. Fuel filter is integral to pump assembly—change it while tank is out.

Estimated cost: $600-1,200

Typical onset: 100,000-150,000 mi

Symptoms: Whining noise during turns, especially when cold, Power steering fluid spots under front end, Heavy steering effort intermittently, Fluid level drops repeatedly

Fix: Pump seals leak at the reservoir neck; rack develops seepage at inner tie rod boots. Pump replacement is 2-3 hours. Rack replacement is 5-6 hours and requires alignment. Most pump failures are due to running low on fluid from slow rack leaks—address both together to avoid repeat failures.

Estimated cost: $450-1,100