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moderate 217 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Of the 217 engine complaints filed for the 2006 Nissan Pathfinder, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
Among the 19 model years of Nissan Pathfinder in our records for engine problems, this one ranks #2 by owner-complaint volume.
Engine accounts for 26% of all owner complaints filed against this vehicle, across 11 categories tracked.
This could cause engine stalling increasing the risk of a crash.
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
CAN COMMUNICATION â NETWORK DIAGNOSTIC FLOW CHART This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
full bulletin at NHTSA ↗OBD II EVAP Tube Warranty Enhancement The update below was sent out to Regions and Dealers in August of this year. We are re-circulating this update to make regional and dealer personnel aware that we are re-notifying customers at this time.
full bulletin at NHTSA ↗SERVICE INFORMATION After ECM reprogramming, the Calibration Verification Number (CVN) needs to be automatically calculated prior to State emissions testing (also known as Inspection Maintainence, I/M, or SMOG testing depending upon location). Allowing the vehicle to idle for 22 minutes will allow for faster CVN calculation. It is recommended that customers utilize this method if the vehicle needs to be tested for emissions soon after ECM reprogramming. See this bulletin for further detail.
full bulletin at NHTSA ↗NISSAN: BLOWER MOTOR DOES NOT WORK. THE BLOWER MOTOR FOR HEATER AND AIR CONDITIONER DOES NOT OPERATE. THERE ARE SIGNS OF WATER INTRUSION IN THE BLOWER MOTOR.
full bulletin at NHTSA ↗BUZZING/WHINING NOISE FROM TIMING CHAIN AREA.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The dominant complaint across 2006 Pathfinder narratives is catastrophic failure of the automatic transmission caused by internal radiator coolant leakage into the transmission. Owners consistently describe transmission slipping, jerking, violent vibration at highway speeds, hesitation during acceleration, and complete loss of power while driving—often with no warning. The failure typically occurs between 80,000 and 110,000 miles, and repair costs run $3,000 to $8,700 for transmission and radiator replacement.
Owners state that Nissan issued an extended warranty covering the radiator and transmission damage to 96 months/80,000 miles (later adjusted to 100,000 miles with tiered deductibles) after widespread complaints and a class action lawsuit, but many owners fall outside this mileage window when failure occurs. Dealership service managers and independent transmission shops report this as a known, frequent issue across the 2005–2007 Pathfinder, Xterra, and Frontier model lines.
Beyond the transmission defect, owners report premature catalytic converter failure ($1,200–$1,500 to replace) around 80,000 miles, malfunctioning fuel gauges that read empty despite full tanks, timing chain rattle from a failed guide, sudden IPDM module failure causing complete engine shutdown, and accelerator hesitation. Several owners describe dangerous incidents—transmission failure on highways, complete power loss while in traffic, and vehicle stalling in intersections. Nissan has not issued a mandatory recall for any of these issues despite acknowledging the radiator defect through the extended warranty program.
Same Nissan Pathfinder engine reports on nearby years: 2005 · 2007 · 2008
Internal radiator coolant line ruptures or radiator cracks, allowing engine coolant to mix with transmission fluid. This occurs most commonly between 80,000–110,000 miles. The contaminated transmission fluid causes transmission degradation and eventual failure. Owners report transmission slipping, jerking, shuddering, hesitation during gear shifts, loss of power during acceleration, and in severe cases, complete transmission failure and vehicle stalling.
When: Typically 80,000–110,000 miles; some failures reported as early as 86,000 miles and as late as 125,000+ miles
Symptoms owners cite: Transmission slipping or shuddering; Jerking or rough shifting, especially at highway speeds or during acceleration/deceleration; Hesitation or loss of power during acceleration; Vehicle stalling or refusing to move during driving or at stops; Violent vibration at 40–65 MPH; Chattering or chuttering noise during acceleration; Transmission fluid appearing watery, reddish-brown, or peanut butter-colored; Coolant fluid appearing thin or discolored; Low coolant levels
Codes mentioned: Check engine light illumination, Transmission control module codes (TCU/TCM failure)
Repairs/costs cited: Radiator and transmission replacement required. Repair costs range from $3,000–$8,700 depending on whether transmission is rebuilt or replaced and whether radiator and related cooling lines are also replaced. Some owners report partial fixes (transmission flush, radiator replacement) that did not prevent subsequent failure. Transmissions frequently on backorder due to high failure volume.
Recalls/TSBs owners mention: Nissan extended warranty on radiator assembly to 96 months/80,000 miles (from 36 months/36,000 miles) due to acknowledged defect. Extended powertrain coverage with tiered deductibles: $2,500 copay up to 80,000 miles, $3,000 copay up to 90,000 miles, $3,500 copay up to 100,000 miles; no coverage beyond 100,000 miles. Class action lawsuit filed and settled. Nissan has issued Technical Service Bulletins (TSBs) and internal notifications to dealerships about the defect. No mandatory recall issued despite widespread complaints and safety implications.
Catalytic converters fail prematurely and require replacement at lower mileages (around 80,000–86,000 miles). Owners report being told replacement is necessary for vehicle to meet emissions standards, with dealer and independent shop quotes ranging $1,200–$1,500. Some owners allege dealer odometer misrecording to deny warranty coverage.
When: Approximately 80,000–86,000 miles
Symptoms owners cite: Check engine light illumination; Failure to pass emissions inspection
Codes mentioned: P0420 or similar oxygen sensor/catalytic efficiency codes
Repairs/costs cited: Replacement cost $1,200–$1,500 per unit. Some owners report multiple converters needing replacement; one owner cited two converters replaced at $3,200 total.
Recalls/TSBs owners mention: No recall or TSB cited in narratives. Dealers perform repairs at customer expense outside warranty.
Fuel gauge sender unit fails, causing the fuel level indicator to display inaccurate readings. Gauge needle may stick on empty despite fuel in tank, or fluctuate erratically (reading full, half-full, and empty repeatedly). Check engine light illuminates with fuel sender diagnostic code. Owners report running out of fuel without warning.
When: Variable; some reported early in ownership (under 100,000 miles); mileage not consistently specified
Symptoms owners cite: Fuel gauge reads empty when tank contains fuel; Fuel gauge fluctuates wildly (full, half, empty) after refueling; Vehicle runs out of fuel without warning; Check engine light illumination; Dashboard cluster malfunction
Codes mentioned: Fuel sender/fuel system diagnostic codes
Repairs/costs cited: Fuel gauge cluster or fuel sending unit replacement required. One narrative mentions diagnostic fee of $98. Owners report attempts to replace cluster, but replacement parts also defective in some cases.
Recalls/TSBs owners mention: NHTSA Recall 10V075000 issued for fuel system auxiliary tank. However, many affected owners report their vehicles are not included in the recall despite having identical symptoms and manufacturing dates, leaving them unable to obtain warranty coverage. Nissan denies responsibility for out-of-recall vehicles.
Timing chain guide plastic or rubber component becomes separated from its aluminum base and falls below the guide, causing the timing chain to lose tension. This results in rattling noise from the timing chain area and risk of chain jump, valve damage, and engine shutdown.
When: Mileage not consistently specified; Service Bulletin EM09-007 (NTB09-128) posted November 2009
Symptoms owners cite: Buzzing or whining noise from timing chain area; Rattling noise from engine; Loss of power while driving at moderate speed (40–60 MPH); Engine misfiring
Codes mentioned: Check engine light (variable codes depending on extent of damage)
Repairs/costs cited: Timing chain guide replacement; estimated cost $1,800. However, owners report Nissan will only cover the repair if vehicle is still under factory or extended warranty. Out-of-warranty repairs are owner's responsibility.
Recalls/TSBs owners mention: Service Bulletin EM09-007 (NTB09-128) issued November 16, 2009, acknowledging the problem. Nissan covers repair only under factory or extended warranty. No mandatory recall. Multiple owners report Nissan dealers aware of the widespread issue but refuse to address it outside warranty period.
IPDM module fails suddenly without warning, causing complete loss of engine power and vehicle immobilization. Engine will not start or, if running, will shut down abruptly during operation. Module controls computer-coordinated power production for all electrical systems.
When: Without warning; no preventative maintenance protocol available
Symptoms owners cite: Vehicle fails to start or immediately stalls after starting; Complete loss of engine power while driving; Extremely rough idling unresponsive to accelerator input; Check engine light illumination; Engine immobilization until module is replaced
Codes mentioned: IPDM failure (requires module replacement; no serviceable codes)
Repairs/costs cited: IPDM module replacement cost $910 for diagnosis and parts. No repair or rebuild option; module must be replaced. Transmissions frequently on backorder due to high demand across Nissan fleet.
Recalls/TSBs owners mention: No recall issued. Nissan has not addressed the issue publicly. However, parts service records suggest a spike in IPDM replacement orders across Nissan vehicles, indicating widespread awareness of the failure pattern.
Vehicle hesitates or loses power during acceleration, particularly when attempting to accelerate from a stop or during highway driving. In critical cases, vehicle loses all power and stalls on roadway, creating immediate safety hazard. Symptoms may be intermittent or progressive.
When: Variable; often linked to transmission or radiator fluid contamination
Symptoms owners cite: Accelerator unresponsive or delayed response to depression; Loss of power or jerking sensation during acceleration; Vehicle stalls unexpectedly while driving or at traffic signals; Hesitation when pulling away from complete stop; Vehicle may stall intermittently, then restart after turning off ignition and restarting
Codes mentioned: Check engine light (codes vary; may indicate transmission control module or fuel system issues)
Repairs/costs cited: Repair depends on underlying cause. If transmission contamination: $3,000–$8,700 for transmission and radiator replacement. If IPDM: $910 for module replacement. If fuel system: variable cost for fuel pump or regulator service.
Recalls/TSBs owners mention: No specific recall for accelerator hesitation separate from radiator/transmission extended warranty program.
Heater and defroster malfunction, often in conjunction with radiator coolant leak into transmission. Radiator fluid leakage into the inner cooling system prevents proper heater operation.
When: Concurrent with or following radiator failure
Symptoms owners cite: Heater does not produce heat; Defroster fails to clear windshield; Windows fog excessively, requiring windows to be opened in cold weather
Repairs/costs cited: Radiator and transmission coolant system flush and replacement required. Cost integrated into overall transmission and radiator repair ($3,000–$8,700).
Recalls/TSBs owners mention: Covered under radiator assembly extended warranty if within 96 months/80,000 miles.
Synthesized from 217 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
Check engine light indicated a problem. After review by a Nissan dealer, there is a crack in the radiator assembly that will cause fluid to leak into the transmission, rendering the vehicle inoperable. Nissan knows about this issue and a class action lawsuit was brought against Nissan. A settlement was made giving only an extended warranty, not a recall. Data shows that it breaks on most cars…
I paid off my pathfinder last year. Just about 2 months ago after leaving a friends house the truck started turning on all the dash board lights, I didn't know what to expect. I drove it very slowly home not even a mile away, I turned it off and next day..my surprise it didn't turn on to take to the mechanic. I called the tow truck to take it in to Nissan dealer and they found that the radiator…
As my wife and I with our 5 children were on our way to church, driving at 45mph the car started jerking dropping at 20mph with traffic behind us on a two way highway we had to pull over on a dirt embankment. We took the car to Nissan dealership and the service rep estimated the cost of $9,000. Problem in radiator crack line inside transmission fluid cooler. Antifreeze leak into transmission…
Just found out that I have the coolant mixed with the transmission fluid causing transmission failure.... Called Nissan consumer affairs and was told I had to go get diagnosis at dealer witch I did at a cost 100.00. Called Nissan back and said I was out of luck and nothing they would do.... How can they get away with selling such a defective part for so long is beyond me and the fact that there…
Radiator failed and cross contaminated transmission with anti-freeze and transfluid. Replaced radiator and flushed transmission in sept 2014 and three months later dec18, 2014 the transmission failed. Repair center said it will cost $4500-$5000 for repair of transmission. *tr
It's a documented issue but not catastrophic. 217 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
Across the 197 complaints that reported odometer mileage, most engine failures cluster between 86,000 and 123,000 miles, with the median around 102,000. A quarter of owners report trouble before 86,000; a quarter make it past 123,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Yes — 1 active recall(s) cover engine issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.