CarComplaints.com Notes: The 2005 Nissan Altima has two fairly significant problems with the floor pan rusting through & motor mounts breaking.
Altima owners report that up to a basketball-size hole develops under the floor mats where the floor pan metal rusts through. Average repair cost is over $1,000.
The broken motor mounts are less of a problem - they break at ~75,000 miles average & it's $400 to fix. Still, motor mounts should not break!
7.6
pretty bad- Typical Repair Cost:
- $70
- Average Mileage:
- 89,200 miles
- Total Complaints:
- 14 complaints
Most Common Solutions:
- not sure (9 reports)
- no heat when idling (2 reports)
- fixed a leaking coolant pipe (1 reports)
- replaced coil (1 reports)
- see above (1 reports)

AC / heater problem
Helpful websites
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A D V E R T I S E M E N T S
as reported by others, the heater does not blow hot air at low rpm, when on high rpm or on highways most of the time it blows hot air but at times it stops. the problem is more evident when the temperature drops below 5C or 41F.
Update from Jan 13, 2018: i had my mechanic check this issue and it is fixed to an extend now. there was a leak in the coolant pipe joint somewhere and he fixed it and topped up the coolant. he mentioned that the fix is partial, it do give better heat but what he found is that the heater is clogged. it will take a lot of labor to remove the entire front panel and clean it up. this is to restore it completely. but I guess for now fixing the leaky pipes has helped.
- R K., Halifax, NS, Canada