Two problems related to battery have been reported for the 2003 Nissan 350Z. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Nissan 350Z based on all problems reported for the 2003 350Z.
Intermittently engine interrupts preventing a cold start. Vehicle was towed to the dealership, and mechanic replaced battery, twice, but the problem recurred.
I purchased a Nissan 350z on 2-25-2003 and have taken it into the dealership, three consecutive times for the same problem. The battery is being drained by some type of electrical short and they cannot find it or fix it.