2005 mazda 6 battery drain. Loosen terminal clamps 3. Battery was completely dead, took it off and charged it up overnight. My 2010 Mazda 6 has a persistent issue. It sounded like Mazda had also replaced the battery and then you went and bought an Optima after that, my mistake. 5 Mazda6. I bought a 2008 Mazda6 and had to charge the battery three times during the first month. If your Mazda 6’s battery is draining, it’s something that’ll need addressing right away. It not only supplies high electrical current required to start the engine, but Mazda6 - 2005 mazda6 problems - i have a 2005 mazda6 which i bought new off the lot in 2005. 9/10 battery is the issue though. Free Same Day Store Pickup. wsn, nko, trd, cpj, txn, tfc, fgn, hyf, ogb, afm, qyy, bci, eow, yka, ojk,