Complete failure of transmission during rush hour. Vehicle needs a new transmission and radiator at a cost of $5,500.
2008 Nissan Xterra powertrain problems
severe 40 complaints filed with NHTSA · avg repair $2,500 · see powertrain across all vehicles →
Failure mileage
Complaints
40
Recalls
0
Avg fix
$2,500
2crashes
1fire
1injury
When does it fail?
Of the 40 powertrain complaints filed for the 2008 Nissan Xterra, here's the actual mileage breakdown — failures cluster heaviest at 150,000+ 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 6 categories tracked.
Owners have filed 40 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: The 2008 Xterra's worst problem is a design defect where the radiator cracks and leaks coolant into the transmission, destroying the transmission ($3,000–$10,000 repair). It typically fails between 80,000–135,000 miles but can hit earlier, sometimes without warning before catastrophic failure on the highway. Nissan issued an extended warranty through class-action settlement (10 years/100,000 miles) but dealers often don't notify owners, and you may find yourself just over the mileage limit with no recourse.
The defining failure on the 2008 Xterra is coolant leaking into the automatic transmission through a cracked radiator, a problem Nissan has known about since at least 2005. When the two fluids mix, the transmission turns to sludge—milky, foamy, sometimes oily—and fails suddenly, often on the highway. Owners report losing power while merging, having transmissions lock up at 70 mph, or engines shutting off completely. One family was rear-ended after the engine killed on the highway at full speed.
Repair costs run $3,000 to $10,000 for a new transmission and radiator. Nissan settled a class-action lawsuit with an extended 10-year/100,000-mile warranty but many owners never got notified, especially those who bought used or whose dealers ignored the issue. Dealers at that time were only flushing transmissions and radiators—a band-aid that failed within weeks or months. Some owners got caught just over the mileage cutoff with no warranty help.
Less common but serious: the 6-speed manual clutch burns out as early as 8,000 miles (average 18,000–25,000), leaving drivers stranded. Timing chain noise and a transmission control module that blows fuses after contamination damage are also documented. One owner experienced a sudden transfer case lock-up that sent the truck into oncoming traffic.
Same Nissan Xterra powertrain reports on nearby years: 2005 · 2006 · 2007
Failure modes owners describe
Coolant-to-Transmission Cross-Contamination (SMOD)
Engine coolant leaks into automatic transmission fluid through a cracked radiator or compromised cooling lines in the radiator's transmission cooler section. Coolant mixes with ATF, turning it milky, foamy, or oily, leading to transmission slippage, harsh shifting, overheating, and catastrophic transmission failure.
When: Typically 80,000–135,000 miles; some reports as early as 77,107 miles. One owner reported symptoms at 2 weeks after a dealer flush at unspecified mileage; another at 109,000 miles in traffic; another at 130,000 miles.
Symptoms owners cite: Transmission slipping or not shifting properly; Rough or hard shifting; Loss of power or sudden deceleration while driving; Transmission will not go into reverse or other gears; Vehicle shuddering or stumbling on acceleration; Engine light (Service Engine Soon) illuminated; Transmission won't start or shifts out of gear independently; Oily or foamy appearance in radiator overflow tank; Dark oily substance or milky/creamy fluid in radiator (described as 'chocolate shake' or 'lotion-like consistency'); Smell of burning clutch fluid or burning odor from engine bay; Clanging noise from front of engine bay; Radiator fluid leaking internally into transmission
Codes mentioned: P0717
Repairs/costs cited: Transmission and radiator replacement required. Owners cite costs ranging from $3,000 to $10,000+. One owner paid $5,500, another $7,000, another $9,000. Some dealership flushes alone cost $1,100 (external cooler, new radiator, new gaskets/filters), but many repairs fail post-flush and require full transmission replacement. Remanufactured parts sometimes fail within 12 months. One owner needed TCM (transmission control module) replacement ($2,000) after initial repair failed.
Recalls/TSBs owners mention: Nissan issued an extended warranty covering the defect up to 10 years/100,000 miles (per class-action settlement) for radiator and transmission. However, many owners report they were never notified of this warranty or the defect by dealers despite multiple service visits. Nissan refused warranty coverage on vehicles above mileage thresholds (some at 80,000 miles, others at 100,000 miles). Some owners were denied reimbursement or compensation. NHTSA investigation DP12004 opened June 11, 2012, received 512 complaints between August 2005 and May 2012; status listed as 'PENDING RECALL' at time of complaints. Nissan has not issued a full recall.
Manual Transmission Clutch Failure (6-Speed)
Premature clutch wear and failure in 6-speed manual transmissions, causing loss of power transfer and stranding. Clutch and/or flywheel wear excessively and require replacement.
When: Between 8,000 and 29,000 miles (well before typical clutch life expectancy). Average reported failure window is 18,000–25,000 miles.
Symptoms owners cite: Clutch burned out while driving; Difficulty engaging gears or loss of drive engagement; Vehicle stranded on roadway
Repairs/costs cited: Clutch and flywheel replacement cost approximately $3,000. Owners report this is a recurring problem; one owner had two failures and expects a third at 40,000 miles.
Recalls/TSBs owners mention: Nissan refuses to cover the repair under warranty or offer any upgrade or redesign. No recall issued. Owners believe the clutch/transmission was adapted from the 350Z and is under-designed for the heavier Xterra and Pickup weight.
Timing Chain Premature Wear
Timing chain shoe and tensioners experience premature wear, producing noise on engine startup and vibration in driveline.
When: Referenced in Nissan Service Bulletin EM09-007; NTB09-128 (November 16, 2009). Timing-related issues mentioned anecdotally in one complaint but without specific mileage.
Symptoms owners cite: Noise like rumble strips or rattling upon engine startup; Vibrations and noise in driveline around 40–50 mph; Noise described as 'speed bump' feeling
Repairs/costs cited: Owner complaint references Nissan service bulletin but does not specify repair cost or required parts beyond 'substandard parts' allegation.
Recalls/TSBs owners mention: Nissan issued Service Bulletin EM09-007; NTB09-128 acknowledging the issue but owner states 'customer service was no customer service.'
Transmission Control Module (TCM) Fuse Failure
TCM begins blowing fuses, preventing engine start and causing burning smell. Occurs as secondary consequence of coolant contamination in transmission; metal contamination from coolant damage shorts electrical circuits.
When: Occurs after initial radiator/transmission repairs when contamination has compromised internal transmission electronics.
Symptoms owners cite: Service Engine Soon light illuminated; Vehicle will not start; TCM module blowing fuse repeatedly; Burning smell from engine bay; Vehicle locked down (no ignition)
Repairs/costs cited: TCM module replacement quoted at $2,000. One owner was told shop could not guarantee the repair and quoted $5,800 for new transmission as alternative.
Transfer Case/Differential Failure
Transfer case locks up or differential breaks while driving, causing sudden loss of power and potential collision hazard.
When: Mileage not explicitly stated; one complaint mentions differential breaking mid-road.
Symptoms owners cite: Transfer case locks up while driving; Vehicle sent into oncoming traffic and guardrail; Differential breaks; Complete loss of drivability mid-drive
Repairs/costs cited: Owner does not specify repair cost.
Transmission Gear Shift Position Mismatch
Instrument panel displays incorrect gear position (e.g., shows reverse when shifter in drive, shows neutral when shifter in reverse). Vehicle may go into unintended gear without warning.
When: Reported at 225,000 miles.
Symptoms owners cite: Vehicle shifts into reverse unexpectedly without warning light; Instrument cluster displays wrong gear position; Shifter position does not match displayed position
Repairs/costs cited: Dealer was contacted but vehicle was not diagnosed or repaired.
Recalls/TSBs owners mention: Manufacturer was made aware but no repair or recall issued.
Synthesized from 40 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 8 most recent
Complete failure of transmission during rush hour. Vehicle needs a new transmission and radiator at a cost of $5,500.
Timing chain.I would like to send out a letter of complaint on my 2008 xterra. I'm one of the hundreds with the premature wear of the timing chain shoe and tensioners mentioned in your 2009 service bulletin em09-007; ntb09-128; nov. 16, 2009. Substandard parts. Your customer service was no customer service. *tr
The differential broke in the middle of the road away from my house but first in weight with the light of the tires I went to check it and nothing after the muffler till the last one broke the differential and now I do not know how to fix it.
Code p0717 the speed sensor is ruined due to a falty radiator leek into the transmission causing deterioration of parts and transmission failure.
I had reach my destination to work and found that my xterra will not go in reverse. I had no previous warning of this or recall notice from Nissan. I have 2 Nissan xterra's after I pay for this $4000.00 repair I plan on selling them both as they are not reliable with this transmission defect.
driving and transfer case locked up sending me in to oncoming traffic and guardrail
I own a 2008 Nissan xterra (4x4 4.0l 6cyl 5 speed automatic transmission) with vehicle mileage of 114k. Im the sole own of the vehicle. In late october of 2012 I had to have the radiator replaced along with the transmission, due to the a interior crack in the radiator causing the coolant to leak into the lines of the transmission fluid. This resulted into complete disaster, as my vehicle was not…
Had powertrain trouble with your 2008 Nissan Xterra?
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 2008 Nissan Xterra?
It's a meaningful issue. 40 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $2,500.
At what mileage does the powertrain typically fail?
Across the 35 complaints that reported odometer mileage, most powertrain failures cluster between 83,000 and 156,000 miles, with the median around 109,000. A quarter of owners report trouble before 83,000; a quarter make it past 156,000. 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 $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/2008/Nissan/Xterra.
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.