UK Nissan Repair Questions? Ask a Mechanic Online.
They will have the flat ribbed belts..normally brake cleaner directly onto the belt itself rib side will verfiy or not if its the belt or the pulleys the belts runs..With the engine off inspect the belt and check the ribs arent cracked..id say if the belt are upto 11yrs old as far as you know..then in my opinion they are way to old and should of been replaced by now..regardless of how many miles..rubber does deteriote and get hard and brittle over time so its certainly worth replacing them...once the belt is off then you check and spin each pulley by hand to listen or feel for any issues ie:- any roughness or stiffness or play in each pulley..if ok then refit your new belts..i suspect thats all it needs going by what you have said..I do hope this helps
They have 2 belts on these petrols. one that drives water pump and an idler and the other does the alternator and the AC compressor..best going in from underneath using a jack and suitable axle stands on level ground surface..remove the underguard if it still has it..and you should see the belts that way...and the tensioner pulleys