jbrown
Active Member
I have some experience replacing battery modules in a 2nd gen Prius. Bought new in 2005 by my daughter-in-law, years later she bought a new one and my son started using the car. Somewhere between 150k and 200k, the check engine light came on and the code pointed to a bad traction battery. Toyota wanted $3500 - $4000 to replace it. I used a code reader that showed the battery bank voltages, and one bank showed low. There are 14 banks, each with 2 modules, 6 cells per module. I took the battery out and found one module with a small hole and burn marks. A used ebay replacement cost $15 back then, and fixed it up fine for a number of years. My son eventually got another car and gave the Prius to my other son's wife. After another year or so, another module failed, and I replaced it for $21 this time. Still going strong with between 250k and 300k miles.
Easier to replace a battery module in that car than to adjust the valves on my Tenere.
Easier to replace a battery module in that car than to adjust the valves on my Tenere.