How To Test & Replace Battery on Porsche Boxster & 911 (1997-2005)

Maintenance Interval 1 Year
Estimated Dealer Cost $600
Estimated Independent Mechanic Cost $450
Estimated DIY Cost $300
Repair Time .25 hours
DIY Difficulty Easy

A car battery has several simple, yet important tasks. It accumulates electrical energy created by the alternator while the engine is running. When the car is turned off, electricity stored in the battery powers all systems that still need to run and provides power for starting the engine. Because modern batteries are very reliable, we often don’t think about our car battery until we experience an issue. In most cases, car batteries last anywhere from 2 to 4 years. However, factors like your driving habits and the environment you’re in will impact the lifespan.

To replace your battery, check out this helpful tutorial above from the YouTube channel, 2CarPros. Detailed battery testing and replacement instructions can be found below.

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Step-by-Step Instructions:

Step 1: Test your battery

  • Start by testing your battery. You can do this by taking your car to your nearest auto parts store.
  • To test the battery yourself, purchase a simple battery tester such as this one.
  • Open vehicle’s hood, then locate the remote battery terminals on the driver’s side under a plastic cover.
  • Remove the plastic battery terminal cover and attached the battery tester.
  • Run through the battery tester’s battery and crank tests. Here is a helpful video from Scotty Kilmer.

Step 2: If your battery is bad, remove the old battery

  • Put on gloves.
  • Open the front compartment area on your vehicle.
  • Remove the plastic battery compartment cover by twisting the two plastic clips.
  • Remove the battery tie down clamp using a 13mm socket and an extension.
  • Loosen the battery terminals using a 10mm socket or wrench.
  • Carefully wiggle out your old battery and lift it out.

Step 3: Insert your new battery and reinstall everything

  • Re-attach the battery tie down clamp and hand tighten it.
  • Place the battery terminals onto your new battery and hand tighten the 10mm bolts.
  • Replace the plastic battery compartment cover.
  • Clean up your work area and put away all your tools. You’re all done!

2 comments on “How To Test & Replace Battery on Porsche Boxster & 911 (1997-2005)

  1. Michael Higgins says:

    Yeah –then reprogramme all the items like clock–speedo in KPH or Miles –Radio & more worth thinking about or as I do connect a small 12 v battery first to the terminals to HOLD the memory & then change the battery

  2. Michael Higgin says:

    Yeah –then reprogramme all the items like clock–speedo in KPH or Miles –Radio & more worth thinking about or as I do connect a small 12 v battery first to the terminals to HOLD the memory & then change the battery

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