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Sorry totally forgot to mention. Just under 194,000km, and automatic transmission. Thanks for the quick reply I will definitely check those things. Are these cars "generally" considered reliable?
Thanks for the quick reply :grin
Generally speaking, yes they are fairly reliable. You can find plenty with alot more miles than that still running. Checking and changing regular maintenance items like fluids, belts, and hoses should keep it going for a while. If it was the 2.5L I would say stay away. My precats went on the 3.5 too, so I replaced them with headers.

Occasionally on this generation of Nissan, cam or crank position sensors go bad and cause no start/stalling issues but those are easy fixes. If you get a misfire on the 3.5 it's usually from a bad coil pack or 2 (theres 6 so if one goes just change all 6). Changing the rear 3 (including spark plugs) requires you to pull the intake plenum off since they are under it.
 

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hello

im chem im looking at a 2006 nissan altima with the 2.5 auto im thinking about getting this car it has 121 ,000 miles and everything seem okay. oil and transmission fluid changed changed are on point and it drives pretty okay there's some kick on the 1-2 shift but she has a lot of power. i heard about the oil consumption and that what backing me off it do anyone who has this model can shed some light on how reliable and how if well taken care of how long she will last
 

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Do some looking around on the forum I am sure they have had some issues with every gen. I don't know myself. I would say like any used car it comes down to how long you need it to last and the price.
 

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Generally speaking, yes they are fairly reliable. You can find plenty with alot more miles than that still running. Checking and changing regular maintenance items like fluids, belts, and hoses should keep it going for a while. If it was the 2.5L I would say stay away. My precats went on the 3.5 too, so I replaced them with headers.

Occasionally on this generation of Nissan, cam or crank position sensors go bad and cause no start/stalling issues but those are easy fixes. If you get a misfire on the 3.5 it's usually from a bad coil pack or 2 (theres 6 so if one goes just change all 6). Changing the rear 3 (including spark plugs) requires you to pull the intake plenum off since they are under it.
Appreciate that rundown as i'm likely buying an 02 3.5 on Monday. The price is really good so even if I sink a few bucks into it I won't complain.
 

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Is it necessary to change the CVT transmission fluid....or recommended??

I hear both.

"You definitely hAVE TO change it and I work for nissan as their head mechanic for the race team Etc Etc"

"You definitely DO NOT have to as its a non serviceable part and I work at a nissan dealership as an ASE certified mechanic AND I have a snap on tool set.blah blah blah"

Which is it????? Thanks :)
 

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Yes, change it. I would only ever go to the dealer with a cvt as well, to expensive to monkey with trying to save a couple hundred dollars. 4k to replace, spend some on maintenance.
 

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Yes, change it. I would only ever go to the dealer with a cvt as well, to expensive to monkey with trying to save a couple hundred dollars. 4k to replace, spend some on maintenance.
No
So change it...got it..... What if you are semi mechanical? certainly done Oil, shocks, brakes, radio\stereo, radiator changes even did the valve adjustment on my 12 Suzuki v strom.......

I am so "scared" of stealerships for the usual reasons ( and general incompetence or just lack of caring )

:surprise
 

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Hey, just picked up a 2006 altima 2.5s 98k miles. I've been researching about the butterfly screw issue from the 4 cyl in the early 2000's and the pre-cats.

I've seen some folks here put down info that it appears Nissan fixed the butterfly valve screw problem on QR25DE's built for 2006 (as the recall was only 02-05), I've seen some folks elsewhere say to go in an loctite them anyway. Now that we're over a decade down the road does that ring true? Is it something I should do just preventative maintenance? Or is it just fine?

Secondly the pre-cat issue. Should I be worried and go in and either knock out the cat or buy some aftermarket cat-less exhaust headers? Or with how well its been maintained and driven and almost 100k as is, should it be alright? It seems to drive beautifully smooth.

This is going to be our family car for as long as we can keep it rolling, so I'm trying to make sure anything I can do preventative, is taken care of.

Thank you.
 

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I wouldnt worry about the butterfly screw. As far as the cats go, if the car didnt have both the camshaft pos sensor and the crankshaft position sensor (both are the same part) changed; then the cats will have been damaged. If that is the case then put in the new metallic position sensor(the faulty ones were plastic) in both places and probably a good idea to get new cats or else just straight pipes if the law allows. If the cats are damaged you run the risk of ceramic dust getting sucked into the motor and ruining it
 

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Appreciate that, I'm going to check those sensors tomorrow. Priced out a couple in advance just to be ready.
Would you have any recommendations on cats and catless exhaust manifolds (debating catless for the short term at least due to budget)?
Figure I'd ask before diving into this, maybe just maybe I'm going to get lucky and the sensors you mentioned were already swapped. The last owners really were ontop of things so. But I'm still preparing for whatever.
 

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Sorry i have no info for you on headers because they are against the law where i live in Ontario Canada. I replaced both my cats and both sensors.
 
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