Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2006 Nissan Xterra owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2006 Nissan Xterra. The contact stated while driving 20 MPH, the vehicle was shaking. The vehicle was taken to an independent mechanic, who replaced the catalytic converter; however, the failure recurred. The vehicle was towed back to the independent mechanic, who diagnosed that there was an engine misfire and the other catalytic converter needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 136,900.
My engine self destruct because Nissan used cheap made plastic tensioners that shredded metal into my engine causing it to self destruct. Nissan knew about this problem and continued installing these tensioners from 2005-2015. I could have crashed into anything while driving or someone could have hit me if my engine would've died while driving. My safety was not prioritized by Nissan. The warning light was a whining noise coming from the engine while startup and pressing on the gas pedal. So they knew the problem existed but didn't care.
Engine noise: - Noise coming from time belt support - The timing chain guide wore out fast. - Timing chain guide inner plastic wore out causing chain to rely metal bracket then the metal causing noise and eventually break the the timing chain.
Upon turning a corner after coming to a complete stop at a stop sign in my neighborhood, I went to accelerate and match the speed of oncoming traffic. The gear failed to shift appropriately (transmission) and giving the car gas simply revved the engine. Luckily the approaching car responded well and slowed to avoid a rear collision while I eased off the pedal and then gently accelerated again to my local mechanic. Upon his examination of my 2006 Xterra, he determined that the transmission fluid and coolant were mixing and destroying both my radiator and transmission. A quick search on the internet revealed that this dangerous problem is common among Nissan owners! When I purchased the vehicle from smithtown Nissan in 2010 and subsequently, there was absolutely no notification or recall regarding this dangerous hazard. This is unacceptable and life-threatening. …
Defective radiator leaked engine coolant into automatic transmission fluid (atf), causing cross-contamination of fluids that will ruin the re5r05a transmission. The engine coolant water contamination can short-circuit the low current electronic computer located on the valve body. This transmission was used in Xterra; frontier; pathfinder and armada vehicles manufactured between 2005 and 2010. Fixing the radiator and replacing the contaminated fluid with fresh fluid does not alleviate the problem, as the transmission computer has been permanently damaged. The only way to fix a damaged transmission computer is to replace it with a new one, and they are only available from Nissan as part of a new valve body assembly. …
As I came up to stop at a red light, the Xterra began to shudder and the tachometer started rising and falling until I finally stopped, then the tachometer dropped below 500 RPM and the truck turned off. Restarted it fine, but it stalled again. I quickly figured out that although it is an automatic, I needed to drive it like a manual. So I put it in neutral, started it again, it did not stall, then I revved the engine to 2,000 RPM and put it into drive. Off I went, and it did not do it again that day. However, over the next month it became a growing problem, until it finally was occurring every single time I stopped unless I put it in neutral. I took it to the mechanic who spent 4 hours diagnosing it to be certain of the problem. Which they said was a failing torque convertor and plate. …
While driving and trying to enter a major highway at about 40 MPH and trying to accelerate, I had to pull out to the shoulder because the truck wouldn't shift to a higher gear...I had to get out of the highway because the truck wasn't able to accelerate and remained on 1st shift struggling to get to 2nd and then 3rd....I got home and heard the engine or radiator make bubbling noise....after 3 or 4 hours I opened the radiator and saw all sorts of gunk like bubblegum...it was still warm and it oozed out falling all over my driveway...I payed a mechanic $300 to change the radiator thinking it was the problem ...only to find out it was much more and more money also....I looked for another mechanic and he said it would cost $4000 to fix everything... I've wasted more than $3000 trying to figure out what the problem is.. …
In October 2015 I noticed that my Xterra was overheating and the transmission was slipping at times. When I removed the radiator cap to check the coolant, it looked foamy and milky, like a lime smoothie. I thought I might have a blown head gasket and took the vehicle to my mechanic, who told me about the issue with Nissan radiator and transmission cross-contamination. He told me that flushing the systems would not help and the entire cooling system and transmission would need to be replaced to the tune of about $6500, which I didn't have. He told me to contact Nissan. Unfortunately, at the time my Xterra was diagnosed, it had 112,000 miles on it, which was beyond the scope of Nissan's extended warranty which came about as a result of the class-action lawsuit. The only thing they did for me was give me a refund on a recall item for which I'd paid before the recall came out. …
A la semana de marzo 30 del 2019 que saque esta camioneta del dealer happy's auto, llc en hays, ks 67601. Este presento un calentamiento del motor, tube que pagar para que le cambiaran en termostato, pero siguio el problema siempre hasta que me dijeron los del mismo dealer que el motor ya no servia. Di 2200 dollars de pago, dijeron que tenia yo que pagar otro motor mas el costo 11,072 dollars de la camioneta. Es un robo, me entregaron la camioneta con el estereo mal, la refaccion no me la pusieron abajo en su lugar, lo cual causo que se me quebrara un plastico de la cajuela traders. Al final les dije que no queria mas la camioneta y me dijeron que estaba bien pero no me devolverian mi dinero, nunca me ensearon el historial mecanico de la camioneta. La camioneta ya tenia mas de 150000 millas. …
Radiator coolant leaked into transmission and we only have 70,000 mileage. Purchased extended warranty but Nissan service said they don't covere the repair and our extended warranty expired. We saved this cat for our 16 years old son for his college soon ang preparing for dmv. We save money for his car so we don't need to worry. Now, we are worried because it will cost us$8,000 for repair by replacing transmission and radiator. Besides this I have to pay $190.00 for diagnostic fee. We are not rich and we prepared this car for our son, for his safety, now his 16 years old this June 2019 and ready to take the wheels, this car is his car for college. Now, I'm heartbreaking because it's garage kept car with blanket all the time. 70K mileage only. Security plus says 72 months/75,000 on odometer. We really need help for repair.
Related recalls
Engine and engine cooling
Nissan is recalling certain model year 2004-2006 armada, titan, Infiniti qx56 and model year 2005-2006 frontier, pathfinder and xterra vehicles. The intelligent power distribution module (ipdm) assembly contains an engine control module (ECM) relay that has a diode for electrical current noise reduction.
Remedy: Dealers will replace the ECM relay inside the ipdm assembly. This service will be performed free of charge. The safety recall began on December 6, 2010. Owners May contact Nissan at 1-800-647-7261.
Engine complaints in other Xterra years
Frequently asked questions
How common are engine problems on the 2006 Nissan Xterra?
NHTSA has 209 complaints about the engine & cooling of the 2006 Nissan Xterra, 27% of the model year's 780 complaints. The component named most often is cooling system › radiator assembly (16 mentions).
Is there a recall for 2006 Nissan Xterra engine problems?
Yes — NHTSA recall 10V-517 (engine and engine cooling, Oct 28, 2010). Recall repairs are free at authorized dealers.
At what mileage do 2006 Nissan Xterra engine problems start?
Half of the complaints with a recorded mileage happened before about 107,000 miles, and 3% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.