Exhaust leak or fumes in the cabin on the 2008 Nissan Altima
When exhaust leak or fumes in the cabin gets reported
Owners of the 2008 Nissan Altima report exhaust leak or fumes in the cabin at a median of 85,000 miles. A quarter of the reports come in before 50,000 miles and a quarter after 115,000 miles, from 10 reports that carried an odometer reading.
A part like this is normally expected to survive 100,000 miles. It is the 19th most-reported problem on this model year.
The mileage distribution
The reported range runs from 45,000 miles at the tenth percentile to 120,000 miles at the ninetieth, a spread of 74,600 miles across the middle 80% of reports.
A spread this wide points at use rather than design. Towing, climate, service history and city mileage all move a failure like this, so the median is a weak guide to any individual car.
0% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 44,400 miles | 48,789 miles | 87,000 miles | 114,250 miles | 119,000 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $250–$2,000 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure on other years
The same failure is reported on 8 model years of this car. It shows up earliest on the 2014, at a median of 200 miles, and latest on the 2009 at 140,000 miles.
By volume the 2002 carries the most reports, with 20; the 2008 has 10. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Tl*the contact owns a 2008 nissan altima. While the vehicle was being serviced, the contact was informed that carbon monoxide was leaking into the vehicle because a cracked weld on the front exhaust pipe. The vehicle had not been repaired. The contact called the manufacturer and was awaiting a response. The failure mileage was 60,154. The current mileage was 30,631. Updated 2/28/11 *cn the consumer stated the vehicle was repaired. Updated 05/20/11
Tl* the contact owns a 2008 nissan altima. The contact noticed a loud ticking noise coming from the front end of the vehicle. The vehicle was taken to a private mechanic, who inspected the vehicle and informed the contact that there was a crack in the exhaust manifold. The manufacturer was aware of the failure. The contact was awaiting a service appointment with the dealer for repairs, since it was covered under the warranty. The approximate failure mileage was 39,000 and the current mileage was 40,000.
Tl* the contact owns a 2008 nissan altima. The contact stated that carbon monoxide was leaking into the vents from the exhaust manifold. The contact took the vehicle to the dealership, who stated that the manifold would need to be replaced. The vehicle was not repaired. The failure and the current mileages were 87,000. Updated 02/13/13*lj updated 02/14/13
Also reported on the 2008 Nissan Altima
Other body or interior problem
Other visibility problem
Airbag warning light or occupant sensor fault
No-start or intermittent start failure
Other electrical problem
Master cylinder or brake booster failure
How far this goes
Complaints are voluntary, so 10 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does exhaust leak or fumes in the cabin happen on the 2008 Nissan Altima?
Across 10 owner reports that included an odometer reading, half were filed by 85,000 miles. A quarter were filed before 50,000 miles and a quarter after 115,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is exhaust leak or fumes in the cabin on the 2008 Nissan Altima?
10 reports have been filed with NHTSA, about 0.7 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed