The 2007 Altima is most notorious for catastrophic CVT transmission failures (especially with the 2.5L) and severe oil consumption issues on the 2.5L QR25DE engine that can lead to complete engine destruction if not caught early.
CVT Transmission Failure (RE0F10A)
Common · high severityTypical onset: 80,000-120,000 mi
Symptoms: Whining or grinding noise during acceleration, Hesitation or shuddering when accelerating from stop, Transmission overheating warning light, Complete loss of forward movement, 'limp mode' stuck in low gear
Fix: CVT replacement is the only real fix once internal damage occurs. Rebuilt units last 12-18 labor hours including fluid fill and programming. Transmission cooler replacement often done simultaneously to prevent repeat failure. Nissan extended warranty to 120k miles on some VINs but many 2007s are outside that window now.
Estimated cost: $3,500-5,500
QR25DE Engine Oil Consumption / Piston Ring Failure
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Burning 1+ quart every 1,000 miles, heavy blue smoke on startup, Check engine light for lean codes (P0171/P0174) from oil fouling O2 sensors, Rough idle, misfires from oil-fouled spark plugs, Eventually complete engine seizure if oil runs dry between checks
Fix: Root cause is ring land failure and cylinder scoring. Proper fix is short block or complete engine replacement (18-24 labor hours). Some owners try piston ring replacement alone (12-15 hours) but often cylinder walls are too scored for lasting success. Used engines run $800-1,500, remans $2,000-3,000.
Estimated cost: $3,000-5,000
Crankshaft Position Sensor Failure
Common · high severityTypical onset: 70,000-130,000 mi
Symptoms: Random no-start, engine cranks but won't fire, Stalling while driving, especially when hot, P0335 or P0340 codes (crank/cam sensor circuit), Tachometer drops to zero while driving then car dies
Fix: Sensor itself is $50-80 part, located at rear of engine block near flywheel. Access requires removing intake manifold on V6 (2.5-3 hours labor), easier on 4-cylinder (1-1.5 hours). Common enough that carrying a spare is smart for high-mileage examples.
Estimated cost: $200-450
Transmission Cooler Line Corrosion / Leak
Occasional · medium severityTypical onset: 90,000-150,000 mi
Symptoms: Transmission fluid puddle under front of car, Transmission overheating after highway driving, Low fluid level on dipstick, pink/red fluid visible, Burnt transmission smell if driven low on fluid
Fix: Steel cooler lines rust through at crimp joints or where they route near subframe. Replace both lines as preventive measure (1.5-2 hours). Aftermarket lines are $100-150 set. Flush and refill CVT fluid adds another hour. Catch early before running CVT dry or you're into full transmission replacement.
Estimated cost: $300-500
Engine Mount Failure (Especially Front/Transmission Mount)
Common · low severityTypical onset: 80,000-120,000 mi
Symptoms: Severe vibration at idle, worse with A/C on, Clunking when shifting from Park to Drive or Reverse, Engine visibly rocking excessively in bay during acceleration, Harsh engagement feel, transmission seems to 'slam' into gear
Fix: Hydraulic mounts deteriorate, especially front and transmission mounts. Replacing all three mounts takes 2-3 hours. OEM mounts are $100-200 each, aftermarket $50-100. Mount failure accelerates CVT wear due to misalignment stress.
Estimated cost: $400-700
Ignition Lock Cylinder / Key Sensor Failure
Occasional · medium severitySymptoms: Key won't turn in ignition, feels 'locked', Steering wheel locks and won't release even with key inserted, Key light flashing on dash, car won't start even with correct key, Intermittent no-start requiring multiple key insertion attempts
Fix: Lock cylinder wears internally or key sensor fails. Cylinder replacement requires steering column disassembly (2-3 hours). New cylinder must be programmed to existing key or all keys reprogrammed ($150-250 dealer cost). Recall 07V402000 addressed some ignition module issues but not all lock failures.
Estimated cost: $350-650
Hard pass unless under 60k miles with obsessive oil-change records and recent CVT service — too many expensive grenades waiting to detonate, especially the CVT and oil-burning 2.5L engine.
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.