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I'm looking for the same answer myself for my 1997 Altima I swore I have been told that it is a chain. But I'm looking for a definite answer. Try this website for more info on the chain or belt http://www.nisspartswholesale.com/200-SXS-001_1996_parts.html
To answer both of your questions Nissan Altima 1993 and up have timing chains and if you have looked for them you're not going to find it unless you take the valve cover off and you will see it on the left side but be thankful for one thing that Nissan guarantees that the timing chain will last the life of the engine which is about 250,000 miles.
Update:Just a confirmation, all the Nissan Altimas with either 4 cylinder or V6 engines had timing chains, not belts. This applies to the KA24DE, VQ35DE, and QR25DE engines.: If the Engine has plastic covers where the serpentine belt is running it's usually a Timing Belt. If it is a metal cover you have a Timing Chain
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Does a 2003 Nissan Altima 2.5 have a timing chain or a timing belt?
The 2.5 litre four cylinder engine in a 2003 Nissan Altima has a timing CHAIN
Does a 2003 Nissan Altima 2.5 have a timimg belt or timing chain?
It must have a timing CHAIN because the Gates website ( they make timing belts etc. ) does not list a timing belt for the 2.5 liter 4 cylinder engine in a 2003 Nissan Altima
Does a 2003 Altima 2.5 have a timing belt or a timing chain?
It must be a timing CHAIN , the Gates website ( they make timing belts etc. ) does not list a timing belt for the 2003 Nissan Altima , 2.5 liter 4 cylinder
How much does it cost to replace the timing belt in a 2003 Nissan altima?
its doenst have a belt its a chain
Does the 2003 Nissan Murano have a timing belt or chain?
timing chain timing chain
How much can you pay to repair timing chain on Nissan Murano?
How much to repair a timing chain on a 2003 Nissan murano
Does a 2003 Nissan Exterra have a timing belt or chain?
it has a timing belt
Does 2003 Nissan Maxima have a timing chain?
yes
Does a 2003 petrol Nissan X - Trail have a timing belt?
No. It has a timing chain.
Does a 2003 Nissan Quest have a timing belt?
No, it uses a chain.
Thermostat locations on 2003 Nissan Altima?
thermostat location on 2003 Nissan altima
How many valves does the 2003 Nissan Altima have?
The 2003 Nissan Altima has 16 valves.
