Changing the Battery in an Aston Martin DB9

Eventually you have to service the battery in your DB9.  They just don’t last forever – and the typical lifespan of a traditional flooded lead acid battery (like the ones originally fitted) is about 5 years.  The good news is that when the time comes to replace your battery you’ll be well equipped to know how and avoid a potentially costly trip to the dealership.

Parts Required

bosch-49-850bagm-batteryIf you are wondering about what battery to get I’ve already completed a detailed article you should check out – Replacement Battery Options for an Aston Martin DB9.   You’ll see how I gravitated to purchasing a Bosch 49-850BAGM Absorbed Glass Matt (AGM) battery.   Now I’ll share the details of how to install it. Continue reading “Changing the Battery in an Aston Martin DB9”

Replacement Battery Options for an Aston Martin DB9

Helpful Neighbor Rob

My baby left me stranded.  I use my DB9 as my daily driver, and I was out on an errand run – ATM then Dry Cleaning then Lunch – all close together.   After the dry cleaning stop I went to start her, and rather than the glorious roar to life, all I got was “Ruh – ruh – click”.  Crap – stranded in the local strip mall parking lot amongst all the Fords and Toyotas – all that start.  My pride was suffering.  Dead Battery.  Fortunately my neighbor Rob and his Subaru came to the rescue and gave me a boost.

Of course, there are a myriad of reasons for a dead battery – leaving the lights on, failing alternator, etc.  Mine was simpler.  Batteries don’t last forever.  A typical lead acid battery (like those originally fitted to a DB9) have a life span of about 5 years under normal regular use.   I had no idea if the battery fitted to my car was the original (since I am not the first owner and have little service history), but as I discovered it was the original, and that meant it was 11 years old!  Wow!   California living.

There had been precursors to the event that I can recognize now looking back on the few weeks preceding this: Continue reading “Replacement Battery Options for an Aston Martin DB9”

Reconnecting the Battery in an Aston Martin DB9

If you’ve been good boy [or girl] and disconnected your battery during a service event like you were supposed to – kudos to you for taking the time!  Or perhaps you are changing your battery and it’s time to hook it up.  Whatever the reason, you’ll want to follow the rights steps to get your DB9 operational again.  Even after you hookup the battery there are a number of steps you need to follow to reset a bunch of the modules.  I will reveal all below. Continue reading “Reconnecting the Battery in an Aston Martin DB9”

Disconnecting the Battery in an Aston Martin DB9

Battery Compartment Opened on an Aston Martin DB9
Battery Negative Terminal Disconnected

There are MANY service events for your DB9 that say to disconnect the battery as one of the steps.   I am as realistic as anyone in this regard – meaning I usually skip this step if I think I can get away with it.  The safety Nazi’s probably tell you disconnect the battery to vacuum the carpets.   But, there are certainly some circumstances where this should be followed.  Working on your fuel system, working on the electrical system, etc.  Any situation where an accidental spark or short could destroy parts of the car. Continue reading “Disconnecting the Battery in an Aston Martin DB9”