Battery Replacement

[Patrick Aschan]

Has anyone tried to replace the battery themselves. The stop/start function rarely works as my battery has no doubt lost some voltage and I don’t do that many miles. I know where to find the battery but do I need to get a dealer to reprogram the car afterwards or case the battery??

 

[stephentodd]

The battery does need coding to the car, otherwise the car does not know it is a new batter, & will continue to charge the new battery like the old one, ie overcharge it.

 

[Scrounger]

If you know someone who has a diagnostic tool such as an iCarsoft, that can be used to code a new battery to the car.

Where in the UK are you?

Dan

 

[Patrick Aschan]

If you know someone who has a diagnostic tool such as an iCarsoft, that can be used to code a new battery to the car.

Where in the UK are you?

Dan

I’m in London so it looks like I’ll have to ask a dealer which is annoying. You’d think you’d be able to do a one for one swap…

 

[marc_tt]

Battery change and coding often comes up on the forum and local battery suppliers / independent garages can do the battery change with coding at far lower cost than OPC.

If you're car is under warranty check the warranty requirements in case you have to have a Porsche branded battery

Hope this helps

 

[Patrick Aschan]

I do have a warranty so I’ll have to ask a dealer…..! Thank for your replies everyone

 

[Lancerlot]

Are you certain the battery is failing? Before investing in an expensive replacement, I would be inclined to check its condition.
Charge it up, then have it tested.
Stop/start can be intermittent for many reasons often connected with engine condition, air con settings etc. Personally I always switch mine off using the diamond button.

Regards,

Clive

 

[Patrick Aschan]

Hi Clive

Something is definitely not right as I drove from Malmesbury to Chichester last weekend and it still won't kick in. I agree with switching it off but as I am a London dweller we're stationary quite a lot! I'll get a local garage to test it.

best

Patrick

 

[Lancerlot]

If initial starting is lazy, and slow, you are probably right and the battery is either low or shot. But my stop/start hasn't been operating for weeks now mainly due to the aircon being fully occupied, As you're concerned it'll obviously be worth checking out. Hopefully you won't need a new battery.
Regards,

Clive

 

[Chris_Jackson]

What voltage is showing on the dash a) when you're first driving after start-up b) after you've been driving for around 20 minutes? (If you're not seeing voltage and one of the readouts in the RH screen, you can add it from the menu)

 

[malarcy]

FWIW the car stores statistics on "reasons why I didn't stop/start" - PIWIS should be able to retrieve that data and give some idea of the the most prevalent reason for not doing it.

That said experience with other brands usually comes down to the car being pessimistic about the state of charge of the battery - sometimes people have battery conditioners connected direct so the control module doesn't know what really went in or out, other times other thresholds or things like "heated rear windscreen is on" or "max a/c" - and some BCM's restrict charging to below maximum ( for battery life like EV's - ford sets theirs to 80%) - so it doesn't take much for an older battery to drop out of the "happy window" the car has set for it.

 

[Patrick Aschan]

What voltage is showing on the dash a) when you're first driving after start-up b) after you've been driving for around 20 minutes? (If you're not seeing voltage and one of the readouts in the RH screen, you can add it from the menu)

I finally got in the car this afternoon. It’s showing 14.7-14.8 most of the time.