The 2003 Altima represents the first year of the fourth generation, with two distinct personalities: the 2.5L I4 is reasonably reliable but plagued by catalytic converter premature failure, while the 3.5L V6 suffers catastrophic precat failure that destroys engines—responsible for the overwhelming majority of 'engine rebuild' jobs you see documented.
Precatalyst Failure Leading to Engine Destruction (3.5L V6)
Common · high severity
Typical onset: 80,000-120,000 mi
Symptoms: Check engine light with P0420/P0430 catalyst efficiency codes, Rattling from exhaust manifolds at cold start, Sudden catastrophic engine failure—loss of compression, metal shavings in oil, Engine runs rough, misfires on multiple cylinders after initial cat codes ignored
Fix: The precats inside the exhaust manifolds disintegrate and ceramic material gets sucked back into cylinders, scoring cylinder walls and destroying pistons/rings. If caught early (just rattling), manifold replacement is 6-8 hours labor. If engine damage occurred, you're looking at short block or complete engine replacement at 18-25 hours labor. This is THE killer issue on V6 models.
Estimated cost: $1,200-1,800 (manifolds only) or $4,500-7,500 (engine replacement)
CVT Transmission Cooler Line Failure (2003-2006)
Common · high severity
Typical onset: 60,000-110,000 mi
Symptoms: Transmission fluid leaking near radiator, Pink or milky fluid in coolant overflow tank (cross-contamination), Transmission slipping, delayed engagement, or complete failure, Overheating transmission or engine temperature issues
Fix: The cooler lines corrode internally where they connect to the radiator, or the radiator's internal trans cooler fails allowing coolant and ATF to mix. If caught before cross-contamination, it's radiator and lines replacement at 3-4 hours. If fluids mixed, transmission is likely toast—CVT flush/replacement adds 6-10 hours. Many shops recommend external trans cooler install as preventive measure.
Estimated cost: $800-1,200 (radiator/lines only) or $3,500-5,000 (with CVT replacement)
Front Lower Control Arm Bushing Failure
Common · medium severity
Typical onset: 70,000-100,000 mi
Symptoms: Clunking noise over bumps from front end, Steering wander or vague handling, Uneven tire wear on inside edges, Visible cracking or separation of rubber bushings during inspection
Fix: The forward control arm bushings tear and separate, causing alignment issues and handling problems. Nissan doesn't sell bushings separately—you replace the entire control arm assembly. Both sides typically need replacement around the same time. 2-3 hours labor plus alignment.
Estimated cost: $400-650
Camshaft Position Sensor Failure (Both Engines)
Common · medium severity
Typical onset: 90,000-140,000 mi
Symptoms: No-start condition, cranks but won't fire, Intermittent stalling while driving, Check engine light with P0340/P0345 codes, Hard starting when engine is hot
Fix: These sensors fail from heat cycling and leave you stranded. Bank 1 sensor (passenger side on V6) is accessible in 0.5-1 hour. Bank 2 (driver side V6) requires removing intake plenum, 2-3 hours. Four-cylinder only has one sensor, 1 hour job. Common enough you should carry a spare if keeping the car long-term.
Estimated cost: $150-250 (easy access) or $350-500 (Bank 2 V6)
Catalytic Converter Failure (2.5L I4)
Occasional · medium severity
Typical onset: 100,000-150,000 mi
Symptoms: Check engine light with P0420 catalyst efficiency code, Rattling from underneath when starting cold, Failed emissions test, Slight loss of power or fuel economy
Fix: The 2.5L doesn't have the catastrophic precat issue like the V6, but the main catalytic converters still fail prematurely. Requires replacement of the Y-pipe assembly with integrated cats. 2-3 hours labor. Aftermarket cats are available but may not last as long or pass strict emissions testing.
Estimated cost: $600-1,200
Transmission Mount Deterioration
Common · low severity
Typical onset: 80,000-120,000 mi
Symptoms: Excessive vibration at idle in Drive, Clunk when shifting from Park to Drive or Reverse, Visible transmission sag or torn rubber mount during inspection, Transmission noise more noticeable in cabin
Fix: The hydraulic transmission mount wears out and causes harsh engagement and vibration. Common on both manual and CVT models. Straightforward replacement, 1.5-2 hours labor. Often done alongside engine mounts if multiple are worn.
Estimated cost: $200-350
Headlight Wiring Harness Melting (Related to Recalls)
Occasional · medium severity
Symptoms: One or both headlights intermittent or completely out, Melted plastic smell near headlight assemblies, Burned or melted connector at back of headlight bulb, Headlights dim or flickering
Fix: Poor connector design and aftermarket high-wattage bulbs cause the harness to overheat and melt. Multiple recalls addressed this but didn't catch all vehicles. Repair involves replacing the affected harness section and connectors, 1-2 hours per side. Use OEM-spec bulbs only.
Estimated cost: $150-300 per side
Owner tips
V6 owners: inspect exhaust manifolds for precat rattle at EVERY oil change after 70k miles—catch it early before engine damage occurs
Check radiator and transmission cooler lines for corrosion annually; consider adding external trans cooler as cheap insurance
Keep spare cam position sensors in the glovebox on higher-mileage examples—they fail without warning
Replace transmission mount and engine mounts as a set around 80k-100k miles to avoid repeated labor charges
Buy the 2.5L if you must, but avoid the 3.5L V6 unless you have documentation of manifold replacement or are prepared for a potential engine replacement—this generation's precat issue is a ticking time bomb.
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.
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SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THESE LAMPS DO NOT CONTAIN THE REQUIRED AMBER SIDE REFLECTORS.
Consequence: DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.
Remedy: SABERSPORT WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON MAY 11, 2009. OWNERS MAY CONTACT SABERSPORT AT 1-909-598-7589.
EXTERIOR LIGHTING:HEADLIGHTS · 07E074000
2007-09-14
CERTAIN EAGLE EYES HEADLAMP ASSEMBLIES, P/NOS. DS517-B001L AND DS517-B001R, SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR THE ABOVE LISTED PASSENGER VEHICLES. THE OPTICEL SURFACE OF THE REFLECTOR IS CORRODED INHIBITING THE PERFORMANCE OF THE UPPER AND LOWER BEAMS WHICH FAILS TO CONFORM TO THE PHOTOMETRIC REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
Consequence: DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.
Remedy: EAGLE EYES WILL NOTIFY OWNERS AND OFFER REIMBURSEMENT FOR ANY NONCOMPLIANT HEADLIGHTS. THE RECALL BEGAN ON DECEMBER 11, 2007. OWNERS MAY CONTACT EAGLE EYES AT 1-800-568-1098.
EXTERIOR LIGHTING:HEADLIGHTS · 07E063000
2007-08-21
CERTAIN ANZO AFTERMARKET HEADLIGHTS, P/N 02-AZ-NA02-B-A, SOLD FOR USE ON 2002-2004 NISSAN ALTIMA VEHICLES. DURING PRODUCTION THE LAMP HOUSING SHAPE DEFORMED DISTORTING THE ASSEMBLY ANGLE OF THE REFLECTOR AND INFLUENCED THE AIMING POSITION. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
Consequence: DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.
Remedy: ANZO WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT LAMPS. THE RECALL BEGAN ON SEPTEMBER 10, 2007. OWNERS CAN CONTACT ANZO AT 909-628-1440.
EXTERIOR LIGHTING:HEADLIGHTS · 07E054000
2007-07-25
CERTAIN MAXZONE HEADLIGHT ASSEMBLIES, DEPO BRAND, P/NOS. 315-1145L-AS AND 315-1145R-AS, SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR THE ABOVE LISTED PASSENGER VEHICLES. DURING PRODUCTION THE LAMP REFLECTOR SHAPE DEFORMED CHANGING THE SHAPE OF THE OPTIC SURFACE. THIS WILL CHANGE THE OPPOSITE POSITION OF LOW BEAM AND HIGH BEAM OPTICSAND CHANGE THE ANGLE OF INCIDENCE AND ILLUMATED LOCATION WHICH FAILS TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
Consequence: DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.
Remedy: MAXZONE WILL NOTIFY OWNERS AND OFFER REIMBURSEMENT FOR ANY NONCOMPLIANT HEADLIGHTS. THE RECALL BEGAN ON JULY 16, 2007. OWNERS MAY CONTACT MAXZONE AT 909-822-3288.
EXTERIOR LIGHTING · 06E064000
2006-07-17
CERTAIN TRADESONIC COMBINATION LAMPS SOLD AS REPLACEMENT LAMPS FOR USE ON THE ABOVE LISTED PASSENGER VEHICLES. COMBINATION LAMPS NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
Consequence: LACK OF AMBER SIDE REFLECTORS IN THE LAMPS WILL DECREASE LIGHTING VISIBILITY TO OTHER DRIVERS AND MAY POSSIBLY RESULT IN A VEHICLE CRASH.
Remedy: TRADESONIC WILL NOTIFY OWNERS AND REPLACE THE LAMPS FREE OF CHARGE. THE RECALL IS EXPECTED TO BEGIN DURING JULY 2006. OWNERS MAY CONTACT TRADESONIC AT 626-934-8884.
ENGINE AND ENGINE COOLING · 06V242000
2006-07-07 · RQ06001
ON CERTAIN PASSENGER VEHICLES EQUIPPED WITH A 2.5L ENGINE, THE CRANK ANGLE SENSOR IS AFFECTED BY TEMPERATURE VARIATIONS. UNDER CERTAIN DRIVING CONDITIONS, THESE VARIATIONS IN TEMPERATURE CAN BE LARGE ENOUGH TO CAUSE A BRIEF INTERRUPTION IN THE SIGNAL OUTPUT FROM THE SENSOR.
Consequence: IF THE INTERRUPTION IN THE SIGNAL FROM THE SENSOR IS SO BRIEF THAT THE ELECTRONIC CONTROL MODULE (ECM) LOGIC DOES NOT HAVE TIME TO DIAGNOSE THE CONDITION, THE ENGINE MAY STOP RUNNING WITHOUT WARNING WHILE THE VEHICLE IS DRIVEN AT A LOW SPEED INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL REPROGRAM THE ECM FREE OF CHARGE. THE RECALL BEGAN ON AUGUST 21, 2006. OWNERS MAY CONTACT NISSAN AT 1-800-647-7261.
EXTERIOR LIGHTING:HEADLIGHTS · 06E023000
2006-03-13
CERTAIN ANZO COMBINATION HEADLAMP ASSEMBLIES SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES. SOME COMBINATION LAMPS ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS WHICH FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT."
Consequence: WITHOUT THE AMBER REFLECTORS, THE VEHICLE WILL BE POORLY ILLUMINATED, POSSIBLY RESULTING IN A VEHICLE CRASH.
Remedy: ANZO WILL NOTIFY OWNERS AND REPLACE THE HEADLAMPS FREE OF CHARGE. THE RECALL BEGAN MAY 9, 2006. OWNERS MAY CONTACT ANZO USA AT 909-468-3688.
ENGINE AND ENGINE COOLING · 03V455000
2003-11-17
ON CERTAIN PASSENGER VEHICLES, THE CIRCUIT BOARD FOR THE CRANK POSITION SENSOR OR CAM POSITION SENSOR MAY HAVE AN IMPROPER SOLDER JOINT DUE TO SOLDER DEFORMATION CAUSED BY HEAT STRESS ACCELERATED BY THE EXISTENCE OF FLUX RESIDUE DURING THE SOLDERING PROCESS.
Consequence: THIS COULD CAUSE THE "SERVICE ENGINE SOON" WARNING LIGHT TO COME ON, CREATE A NO START CONDITION, CAUSE REDUCED ENGINE POWER, OR CAUSE THE ENGINE TO STOP RUNNING WITHOUT WARNING DURING VEHICLE OPERATION, WHICH COULD RESULT IN A CRASH.
Remedy: DEALERS WILL REPLACE THE CRANK POSITION SENSORS. CAMSHAFT POSITION SENSOR(S), AND IN SOME CASES, THE VARIABLE TIMING CONTROL SENSOR(S). VEHICLES INVOLVED IN A PREVIOUS RECALL CAMPAIGN, 01V357, ARE ALSO INCLUDED IN THIS NEW CAMPAIGN. THE REPLACEMENT SENSORS USED IN THAT CAMPAIGN ARE ALSO AFFECTED. OWNER NOTIFICATION BEGAN ON DECEMBER 22, 2003. OWNERS SHOULD CONTACT NISSAN AT 1-800-647-7261 OR INFINITI AT 1-800-662-6200.
ON CERTAIN PASSENGER VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF ALASKA, COLORADO, CONNECTICUT, IOWA, IDAHO, ILLINOIS, INDIANA, KANSAS, MASSACHUSETTS, MAINE, MICHIGAN, MINNESOTA, MISSOURI, MONTANA, NORTH DAKOTA, NEBRASKA, NEW HAMPSHIRE, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, SOUTH DAKOTA, UTAH, VERMONT, WISCONSIN, AND WYOMING. AT EXTREMELY COLD TEMPERATURES, MOISTURE IN THE FUEL TANK COULD FREEZE AND FORM ICE CRYSTALS. THESE ICE CRYSTALS MAY OBSTRUCT THE SUCTION OPENING OF THE FUEL PUMP.
Consequence: THIS CAN PREVENT THE SUPPLY OF FUEL TO THE ENGINE AND CAUSE THE ENGINE TO STOP, WHICH COULD RESULT IN A CRASH WITHOUT WARNING.
Remedy: DEALERS WILL INSTALL A SCREEN AT THE SUCTION OPENING OF THE FUEL PUMP TO PREVENT ICE CRYSTALS FROM BLOCKING THE OPENING. OWNER NOTIFICATION BEGAN ON AUGUST 18, 2003. OWNERS SHOULD CONTACT NISSAN AT 1-800-333-0829.
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE · 03V084000
2003-03-11 · PE02078
ON CERTAIN VEHICLES EQUIPPED WITH THE 2.5 LITER ENGINE, THE EXHAUST PIPE HANGER PIN MAY CATCH DEBRIS FROM THE ROAD THAT COULD BE IGNITED BY CONTACT WITH THE MAIN CATALYST. ALSO ON 2002 ALTIMA AND SENTRA VEHICLES, CERTAIN ENGINE OPERATING CONDITIONS MAY CAUSE THE PRE-CATALYST TO OVERHEAT AND DAMAGE THE CATALYST SUBSTRATE.
Consequence: EITHER OF THESE TWO CONDITIONS COULD RESULT IN A FIRE.
Remedy: DEALERS WILL REMOVE THE PROTRUDING PORTION OF THE EXHAUST PIPE HANGER PIN. IN ADDITION TO THE CORRECTIVE ACTION, IN ORDER TO REDUCE THE RISK OF FIRE IN THE EVENT OF POOR OR IMPROPER MAINTENANCE THAT COULD RESULT IN OIL SPILLAGE, HEAT SHIELD(S) WILL BE INSTALLED ON THE PRE-CATALYST AND EXHAUST TUBE. OWNER NOTIFICATION BEGAN ON JULY 28, 2003. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT NISSAN AT 1-800-647-7261.
NISSAN RECALL NOS. R3007, R3014, R3015, R3016, R3017. ALSO ON 2002 ALTIMA AND SENTRA VEHICLES, CERTAIN ENGINE OPERATING CONDITIONS MAY CAUSE THE PRE-CATALYST TO OVERHEAT AND DAMAGE THE CATALYST SUBSTRATE. IF SUBSTRATE PARTICLES ENTER THE COMBUSTION CHAMBER, THEY COULD SCORE THE CYLINDER WALLS, RESULTING IN INCREASED OIL CONSUMPTION. IF THE ENGINE OIL LEVEL IS NOT CHECKED ON A PERIODIC BASIS AND DROPS BELOW THE LOW LEVEL, AND THE DRIVER CONTINUES TO OPERATE THE VEHICLE IGNORING NOTICEABLE ENGINE NOISE, ENGINE DAMAGE MAY OCCUR WHICH COULD RESULT IN A FIRE. THE PRE-CATALYST WILL BE TESTED TO ENSURE IT IS WORKING PROPERLY AND REPLACED IF NECESSARY. IF DAMAGE IS FOUND INSIDE THE PRE-CATALYST, IT WILL BE NECESSARY TO REPLACE THE ENGINE.
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