Tl* the contact owns a 2005 Nissan pathfinder. While driving 55 MPH with the cruise control activated, the rpms accelerated and the vehicle stalled without warning. The vehicle was able to restart on the first attempt, but the gears failed to shift. The vehicle was towed home. It was diagnosed that the transmission was flooded with water and the radiator needed to be replaced. The radiator was…
2005 Nissan Pathfinder engine problems
moderate 315 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
315
Recalls
0
Avg fix
$3,100
1fire
1injury
When does it fail?
Of the 315 engine complaints filed for the 2005 Nissan Pathfinder, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
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.
What stands out
Of the 19 model years of Nissan Pathfinder we track for engine problems, this one carries the most owner complaints on file — 315.
Engine accounts for 30% of every owner complaint on file for this vehicle — the dominant problem area across 11 categories tracked.
The failure pattern owners describe
Buyer takeaway: 2005 Pathfinders have two serious defects: coolant leaking into the transmission from a cracked radiator (most common; failure risk accelerates beyond 80,000 miles), and plastic timing chain guides that degrade and can break, causing sudden engine loss. Radiator-to-transmission contamination can cost $3,000–$7,000 to repair; Nissan's extended warranty covers vehicles only up to 80,000–100,000 miles, leaving higher-mileage owners without manufacturer support despite Nissan's known awareness of both issues.
Owners of 2005 Nissan Pathfinders report two distinct engine-related failure patterns: radiator defects causing transmission contamination, and timing chain degradation.
Radiator-to-transmission cross-contamination dominates the complaints. Owners describe a cracked or failed radiator allowing coolant to leak into the transmission cooling lines, mixing with transmission fluid. Symptoms include hard shifting, slipping gears, shuddering at low speeds (30 mph), hesitation on acceleration, inability to engage reverse or drive, and eventually complete transmission failure. Owners report losing acceleration in traffic—a safety hazard—with some incidents involving near-collisions. One owner experienced a fire when transmission fluid reached the catalytic converter. Dealers confirm this is a recognized issue; some service managers tell owners Nissan changed radiator designs post-2007 because of it. Repairs run $2,500–$8,000 depending on transmission damage severity and whether coolant has already contaminated the fluid. Nissan extended the radiator warranty to 96 months/80,000 miles but refuses to cover cascading transmission damage in many cases, especially vehicles over 100,000 miles.
Timing chain failures appear in multiple complaints. Owners report a whirring or slapping noise from the engine, eventually leading to loss of power and loud clunking. One mechanic notes timing chains should last the life of an engine and are not a maintenance item. Nissan issued Technical Service Bulletins (NTB07-042, NTB07-042A, NTB09-128) acknowledging inferior plastic guides in pre-2008 models, and changed the parts design in 2008. Repair costs approximate $2,000–$2,500. Owners express frustration that Nissan has not recalled the defect or widely communicated the danger despite known design flaws and post-warranty failures.
Same Nissan Pathfinder engine reports on nearby years: 2006 · 2007 · 2008
Failure modes owners describe
Radiator-to-Transmission Coolant Leak
Internal crack or seal failure in radiator transmission cooler section allows engine coolant to leak into transmission fluid, cross-contaminating both fluids and damaging transmission internals.
When: Typically 54,600–130,000+ miles; often manifests after 80,000-mile extended warranty expires. Owners report failures as early as 54,600 miles (well-maintained vehicle) and at 120,000+ miles.
Symptoms owners cite: Hard shifting, grinding noise during gear changes; Transmission slipping in and out of gears; Shuddering or vibration at 30–45 mph, worse in overdrive; Hesitation or loss of acceleration when pressing gas pedal; Loss of power or inability to move when in drive or reverse; Vehicle stalling or refusing to accelerate in traffic; Engine running but transmission not engaging (high RPMs with no movement); Check engine light illumination; Transmission fluid mixing with coolant (milky appearance in radiator)
Codes mentioned: No specific codes in many early cases; transmission computer shorts out in advanced contamination, Check engine light triggered in later stages
Repairs/costs cited: Radiator replacement $500–$1,500; transmission repair or replacement $2,500–$8,000; labor varies widely. Some owners paid $3,000–$7,000 total. One owner: radiator and transmission $6,981.86 first failure, $1,499.19 second failure 14 months later. Nissan extended warranty covers radiator and sometimes partial transmission cost if detected early, but owners over 100,000 miles typically denied. Some shops unable to source parts due to high demand for repairs.
Recalls/TSBs owners mention: Nissan issued radiator warranty extension to 96 months/80,000 miles (later adjusted to 100,000 miles in class-action settlement). Extended warranty applies only if work order explicitly states transmission damage caused by radiator failure. Nissan refuses recall, citing low injury/death count. Some regional Nissan dealers offer 'goodwill' assistance (parts only, labor owner's responsibility) if owner is within extended warranty window, but many deny any help. One owner reported Nissan policy limits to one 'goodwill' measure per vehicle. Class-action settlement reportedly covers mileage up to 100,000 miles only, leaving owners with 100,000+ miles without recourse.
Timing Chain Degradation and Failure
Plastic guide components in timing chain mechanism deteriorate, causing chain to slip or break. Chain then slaps inside timing cover, losing engine synchronization and power.
When: Typically 49,000–130,000+ miles. One owner with 49,997 miles reported whining; another at 86,000 miles. Failures can occur post-warranty.
Symptoms owners cite: Whirring or whining sound from engine, sometimes for months before failure; Loud slapping or clunking noise from timing cover; Sudden loss of engine power while idling or driving; Engine unable to crank or start after failure; Vehicle stalled in driveway or on roadside (owner was lucky not to be at highway speed)
Codes mentioned: No specific diagnostic codes reported; issue diagnosed by visual/mechanical inspection
Repairs/costs cited: Timing chain and guide replacement approximately $2,000–$2,500. One owner stated the cost to repair exceeds vehicle's current value in some cases.
Recalls/TSBs owners mention: Nissan issued Technical Service Bulletins NTB07-042, NTB07-042A, and NTB09-128 acknowledging the plastic guide defect in pre-2008 models. Design was changed in 2008 and forward. Despite documented knowledge and design revision, Nissan has not issued a recall. Owners report being told by dealerships that this is a known issue, but no recall or customer notification program was initiated. One owner was surprised Nissan did not communicate the hazard to customers, especially given the change in design for newer models.
IPDM (Intelligent Power Distribution Module) Failure
The IPDM module shuts down or malfunctions, causing sudden engine stall without warning during driving.
When: Approximately 2005 onward. Reported failures starting around 2005–2009. One owner first experienced stalling in September 2009.
Symptoms owners cite: Engine stalls suddenly and unpredictably while driving at any speed; Most dangerous at highway speeds with traffic; Engine stalls on downhill grades, causing loss of power brakes and brake assist; Vehicle cannot be restarted while rolling (steering wheel locks); No warning or prior symptoms
Codes mentioned: No diagnostic codes in early complaints; issue identified through research and internet forums
Repairs/costs cited: IPDM module replacement cost not specified in narratives, but owners note module was on backorder due to high demand.
Recalls/TSBs owners mention: A recall was eventually issued for this problem, but owners report Nissan was not apparently aware of the issue earlier despite complaints. One owner notes the problem 'appears to have started in about 2005' and expresses disbelief that Nissan was not aware given the time span.
Synthesized from 315 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 5 most recent
I was driving the car and when on the onramp of the freeway, the car lost power and shut down. Nissan dealership said the radiator leaked fluid onto the transmission causing it to loose power. They said I need a new transmission and radiator but will not cover the warranty which was settle in us district court of new york. They want to charge me $5300 for the repairs. This is clearly a faulty…
Radiator cracked and contaminated the transmission fluid. I had to replace the defective radiator and flush/refill the transmission fluid.
My car had 1/4 fuel, I filled the tank to full, the gas gauge do not set the car to full tank, I read the book and made the instructions but the gauge do not change, when I run the car for 2 hrs. And I turn off, it began to change to full tank. The other issue was when I had a 1/2 tank of gasoline...I stop for 5 minutes and I leave the car on, when I returned saw the gas gauge in empty...…
The transmission started slipping when accelerating at all speeds. Coolant was found in the trans fluid. The radiator and water pump had to be replaced. We had to also add a oil cooler as a precaution. Now 8k miles later the transmission has failed and will not shift into 5th gear. Best case scenario is a new trans valve assembly for $1500 or worst case new trans for $6500. *tr
Had engine trouble with your 2005 Nissan Pathfinder?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2005 Nissan Pathfinder?
It's a documented issue but not catastrophic. 315 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Across the 289 complaints that reported odometer mileage, most engine failures cluster between 78,000 and 115,000 miles, with the median around 95,000. A quarter of owners report trouble before 78,000; a quarter make it past 115,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
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.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/Nissan/Pathfinder.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.