I just replaced the alternator on my 09, it cost me $190 for the part (Denso refurb - shipped, including taxes) from Rockauto.
Denso alternator was like $350 and it took us like 3 hours as total novices and that includes the 3 trips we ended up taking to NAPA.
Did my own alternator, Denso 300.00. Took about an hour.
Alternators do like to go out on ISs. Burning smell and whining is the telltale signs of it going out.
Denso. Expensive but, my last one lasted 25 years lol.
DENSO remanufactured is solid.
Get Denso 2104148 that’s what I recently got. Works great!
Just make sure to buy either new OEM, used OEM, or a good rebuild like Denso. Parts store ones have a bad record of either being bad directly out of the box, or crapping out in short order.
I've gone through three Denso alternators in the last 4 years! This last one went almost two years before going out.
November of 2023 I had to replace the alternator. I purchased an aftermarket and had a mechanic friend install it for me. 6 weeks later it started acting up again and left me stranded. The battery tested good, alternator was bad. I returned the alternator and was warranted a second one. Roughly 2 months later, the battery light comes on while I am out of town. I pulled into a local parts store and had it tested. Battery tested fine. Alternator tested bad. The Nissan dealership says it is the alternator. But since I had not used a factory alternator that was the problem. Apparently the aftermarket alternators can not handle the load and are not set up properly.
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