Mine's a 2009 with 189k miles. I had no problems up until last weekend when the car started to shut down on the freeway and eventually had to have it towed to a local mechanic, then to a dealership.
The mechanic told me the 12v battery was completely dead and wasn't able to further diagnose so off it went to dealership. The dealership told me that I needed a new battery, ignition coil packs, an ECM fuse and reprogramming to get the car running. There were other wear and tear mechanical issues but not critical to issue at hand.

I plan to replace the battery, ignition coils and fuse (15 A mini) and have the dealer reprogram, if it's really needed.
I am trying to source the 12v from a place other than the dealers around me but not having much luck (see my first post re this matter).

Other than that the car's been driving well and getting about 32.5 mpg and noticeably a little louder enging on cold morning starts.
Other than regular oil changes, at 10k mile intervals, the only thing replaced were the rear struts and the EGR(?) valve.

YU888, what was the cost, parts + labor, for replacing the Hybrid battery pack with a refurbished one? In what city are you located?

 

I just hit 250k miles only 09 Altima Hybrid. Over the last cpl months code p0ac4 has popped and I reset it with my OBD II reader bought from Harbor Freight. The dealership wanted 1200 for the part i found a new one on Ebay for 250, took an hr to replace and code cleared and back to getting 33mpg. I did have to get the key remote reprogrammed after replacing module which cost me 90.

 

I have a 2008 and just crossed the 300k milestone. No major problems in the 10 ½ years that I have owned it. It has the ORIGINAL hybrid battery. I am about to treat it to new tires (I have over 110k on the set I am replacing) and front brakes (pads only) – this is only the second time since owning it that I have done anything to the front brakes. I do all factory service and the car will have its 10th major service this week. The 12v battery has been replaced twice, a new exhaust system including catalytic converter is the most expensive maintenance that has been done. I am still getting 33 -34 MPG and drive the car very hard. By far the best, most reliable car that I have ever owned.

 

 

 

 

Hi, I have a 2007 Nissan Altima with 299,350 miles. Just replaced part of the exhaust at just under 299,000! Excellent car - have never replaced the hybrid battery 🤞. We bought the car new in March of 2008. Hoping to get another 2 years now that I have retired. Still rides well.

 

I have 203K plus mileage on my 07 Altima Hybrid, All was well until I took car to the dealership to get a full diagnostic on it, other than minor mechanical issues I got clean bill of health, one week later 2 coils went, I replaced them but since then I've been experiencing rough idling. I have changed the manifold and flex pipe as well as the torque mounts. Car still runs, still gets 600 miles a tank but front end suspension is always an issue, especially in New York. The only leak that has been detected is the oil cooler seal seeps but its not major, probably change that the next time I do a radiator flush. My hybrid battery is still strong, I have changed the regular battery 2 years ago.

 

I have a hybrid I am trying to change the transmission fluid and I do not know where the drain and fill bolts are can someone please help