Total transmission failure on i95 in connecticut ,10pm at night, at 55mph , with family in car. Coolant leaked into the transmission causing a total transmission failure. Nissan knows about this problem and did not contact vehicle owners to warn of the problem or offer suggested repair. Replacing the radiator would have been a $300.00 fix. Instead Nissan offered no warning and the extremely…
2006 Nissan Pathfinder powertrain problems
moderate 285 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
285
Recalls
0
Avg fix
$2,500
2crashes
2injuries
When does it fail?
Of the 285 powertrain complaints filed for the 2006 Nissan Pathfinder, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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
Powertrain accounts for 34% of every owner complaint on file for this vehicle — the dominant problem area across 11 categories tracked.
Owners have filed 285 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
The failure pattern owners describe
Buyer takeaway: A 2006 Pathfinder with high mileage faces a serious radiator-transmission defect: coolant contaminating the transmission causes sudden, catastrophic failure that can strand you in traffic. Nissan's limited warranty extension won't cover most failures, and repair costs exceed $5,000—inspect the transmission fluid condition closely and budget for replacement if buying this model.
Owners report a systematic failure pattern: the radiator's internal transmission cooler cracks or ruptures, allowing engine coolant to contaminate transmission fluid. This cross-contamination destroys the transmission and often requires replacement of both components.
Failures typically manifest as shuddering, vibration, or jerking around 40–60 mph, followed by loss of power, transmission slipping, or complete refusal to shift. Many report the problem strikes suddenly after 80,000–120,000 miles, often during highway driving with multiple passengers aboard—a serious safety hazard. One owner stalled in an intersection; another lost acceleration on a busy freeway at rush hour.
Repair costs run $4,000–$10,000, with most shops quoting $5,000–$7,000 for a new radiator and transmission. Nissan extended the warranty to 80,000 miles or 100,000 miles depending on VIN, but most failures occur after those thresholds. Owners report Nissan denied coverage, blamed owner maintenance (despite documented service records), or offered partial assistance with steep deductibles ($2,500–$3,000). Nissan also refused claims based on mileage thresholds despite acknowledging the defect. One mechanic independently confirmed the transmission and radiator must often be sold as a package, indicating the industry recognizes this as a paired failure. Dealerships inconsistently diagnosed the problem and sometimes missed it entirely on multi-point inspections.
Same Nissan Pathfinder powertrain reports on nearby years: 2005 · 2007 · 2008
Failure modes owners describe
Radiator internal failure with transmission fluid contamination
The radiator's internal transmission cooler line cracks, splits, or ruptures, allowing engine coolant to enter and contaminate the transmission fluid, or transmission fluid to mix with coolant. This cross-contamination causes severe corrosion and rapid transmission degradation.
When: Typically 80,000–120,000 miles; failures often occur suddenly with little warning
Symptoms owners cite: Shuddering or vibration at 40–60 mph; Jerking or hard shifting, especially during acceleration; Loss of power or inability to accelerate; Transmission slipping, engine revving without vehicle moving; High RPMs with minimal forward motion; Transmission refusal to shift or engage gears; Milky or discolored coolant/transmission fluid (pinkish, dark, or slushy appearance); Service Engine Soon light; Vehicle stalling or dying mid-drive
Codes mentioned: P1710 (Transmission Oil Temperature), P1764 (Direct Clutch Solenoid Valve Circuit Fault), P1731 (First Gear Engine Breaking Logic Error)
Repairs/costs cited: Requires replacement of radiator and transmission; some shops report selling them as a package. Costs $4,000–$10,000, typically $5,000–$7,000. Flushing of coolant system and transmission fluid also needed. Some shops performed multiple transmission fluid flushes as temporary measures before eventual transmission replacement.
Recalls/TSBs owners mention: Nissan extended warranty to 80,000 miles (or 100,000 miles depending on VIN) under a class action settlement; does not cover failures beyond those thresholds. Many owners denied coverage due to mileage exceeding warranty limits. Nissan blamed owner maintenance or transmission fluid quality rather than acknowledging the radiator defect. Some owners received class action settlement notices but found their VIN or mileage excluded from coverage. Nissan offered partial assistance with co-pays ranging $2,500–$3,000 but refused to cover full repair costs for out-of-warranty vehicles.
Synthesized from 285 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 9 most recent
The transmission and radiator fluids are intermingling and has caused my transmission to fail. It has ruined the transmission. It is my understanding that this has happened to thousands of the same make and model.
The transmission and radiator fluid mixing and causing transmission to fail. I see that you have had many complaints about this issue and you choose not to help the consumers. This is a very dangerous issue and a very expensive repair. This is obviously a continuing problem and an extended warranty isn't fair to the consumer because this is a faulty issue with this model transmission/radiator.
On august 19th while traveling on the highway when I noticed what appeared to smoke coming from my engine and noticed my temperature gauge reading that it was overheating. I pulled over on the shoulder and observed, what I now know was, coolant vaporizing from my engine. At this time all the mechanics I called where wrapping up for the day, so I had it towed and taken to a local Nissan service…
While entering highway the transmission started growling and would not shift. Oncoming traffic traveling at 60+ MPH had difficulty avoiding my automobile. *tr
I brought my 2006 Nissan pathfinder to a local Nissan dealership to check out a completely unrelated issue when I was made aware that my car had the problem of a cracked radiator that contaminates the transmission fluid that could lead to major problems if not corrected. Since I have less than 90,000 miles, I'd have to pay a co-pay of $2500 out of pocket. Evidently there is no recall on this…
The engine starts up but will not shift to second gear. *tr
Radiator and transmission fluids mixed causing massive radiator blow out and replacement. . Cost of $2000 then after being told the transmission survide and limited driving now a few thousand miles later and about a year later now the transmission is shot no reverse and only one forward gear!
While in gear, traveling approx. 40mph, vehicle stopped moving without warning (no engine light, no overheating) and had to coast during heavy freeway traffic, which caused several other vehicles to suddenly slow or stop. Car was towed & code evaluation was performed. Radiator and transmission had to be replaced due to a defective radiator which leaked coolant into transmission for $5347.52.
Had powertrain trouble with your 2006 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 powertrain problem on the 2006 Nissan Pathfinder?
It's a documented issue but not catastrophic. 285 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 256 complaints that reported odometer mileage, most powertrain failures cluster between 90,000 and 126,571 miles, with the median around 103,242. A quarter of owners report trouble before 90,000; a quarter make it past 126,571. 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 $2,500 for powertrain 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 powertrain?
No active recalls currently cover powertrain 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/2006/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.