12v Battery Replacement

[spembo]

I suspect I may need to replace my 12v battery. I have had 12v warnings in the past, usually when camping and doors have been opened lots, although it’s always just said something about driving carefully and goes away after a short drive (although never did this in the early years)

I’ve recently been getting parking sensor issues, usually at low speed or braking, but usually disappear. Possibly more relevant on sunny days. I don’t believe a damaged sensor, as been through that scenario in the past, so suspect maybe linked to battery. The battery read 12.4V on the multimeter tonight, which I know is on the edge.

I’ve no problem fitting the battery, but have been reading about potentially needing to update the serial with OBDeleven (which I don’t have), I’m not sure if this is valid for mk4, but also read if close enough match to just drive around and it will eventually adjust its charging profile.

Does anyone have advice?

Car is a few months over 3 yrs old.

 

[KoNG]

I replaced my battery about 3 months ago (First Edition 2020). The car still worked fine, as it's a 1.5 Etsi, but when I measured the battery with a device from Amazon, it showed 56% battery life. I had already had a problem when the car died completely; therefore, I bought a battery jump-start. As the car is now parked outside over the winter (it was in the garage before), I didn't want to be in a situation where it wouldn't start because the battery would just die on its own due to its age. I coded the new battery, and as I did my research, it's important to do so, as battery charging is affected by its age, and the unit adjusts its charging curve to adapt to its life. I would recommend coding it.

 

[spembo]

I replaced my battery about 3 months ago (First Edition 2020). The car still worked fine, as it's a 1.5 Etsi, but when I measured the battery with a device from Amazon, it showed 56% battery life. I had already had a problem when the car died completely; therefore, I bought a battery jump-start. As the car is now parked outside over the winter (it was in the garage before), I didn't want to be in a situation where it wouldn't start because the battery would just die on its own due to its age. I coded the new battery, and as I did my research, it's important to do so, as battery charging is affected by its age, and the unit adjusts its charging curve to adapt to its life. I would recommend coding it.

Thanks for replying, good to hear an experience of not coding.

Did you invest in obdeleven just for the battery change? I’m contemplating whether Carista may be better option for myself, as can go monthly as needed as opposed to a 12 month as not generally interested in making changes.

 

[KoNG]

I've been using OBDeleven for several years already, initially with my previous car more than 6 years ago, so I have the first version of the device. Check the forum; maybe somebody can do that for you, depending on your area.

 

[spembo]

Replaced the battery and coded the battery with Carista, would have gone OBDelevin if they’d a monthly subscription option. Worked out touch cheaper then halfords would have cost, and have the tool available for future.

 

['& Son' managed]

Battery has died on Dad's 2018 1.2 s/s Leon, not so surprising given it's life of mostly short journeys.

The replacement will need coding-in, which I don't have the tools to do. Current best quote all-in
including £50 for fitting is Halfords at £150. I'm guessing that £50 for fitting/coding is around the
current going rate.

Tayna has a suitable battery for £68 including delivery, but they won't quote a local fitting price until
after you've bought it. Anyone know a typical Tayna agents fitting charge?

Any other ideas welcome, South Coast region. For clarity, I can easily remove and fit a new battery,
it's the means needed to code it in that I don't have. TIA

 

[spembo]

Carista is £65 for hardware and one month subscription if you wanted sort yourself. Just a matter of remembering terminate subscription so it doesn’t rollover another month.

 

['& Son' managed]

Battery was so dead that I unexpectedly couldn't get it started even with jump leads - and
this was after a 35 mile drive less than 24 hours before. Luckily the Leon was parked safely
enough just around the corner in a quiet close. Because of the situation, a mobile fitter was
the obvious solution and Halfords proved to be the cheapest of all the national and local
options I researched. In contrast to their usual reputation, the guy turned-up at a sensible
time, did a perfect job without complaint, all finished including coding within 15 minutes.