AGM Battery Replacement?

4.2 V8 32v FSI - 444 bhp
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Banbury
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Joined: Mon Mar 18, 2019 11:02 pm

AGM Battery Replacement?

Post by Banbury » Fri Jan 10, 2020 5:05 pm

Hi Chaps, I need your advice ...

I am ordering a replacement battery for the car. But - I am not sure if this is the correct type/ size etc?

-YUASA 020 9000 Series AGM Car Battery - 4 Year Warranty. Part No : 971NA0490 4 Year Guarantee
-Car is RS4 Avant B8 model registered December 2014

Note: My old M3 had a Bosch battery and I have no clue about "YUASA"... Also I had to have the CTEK charger connected M3, while I changed the battery, as folks said it would need "recoding" if no battery connected for too long.

Happy to go with your recommendations if you know what will fit and work. :D

Many thanks!

johnnydog
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Joined: Sat Jun 11, 2011 8:24 pm

Re: AGM Battery Replacement?

Post by johnnydog » Sun Jan 12, 2020 12:31 am

I have a January 2015 registered B8 (manufacturered Oct 2014) which threw up a suspension fault light in November last year on a cold start up. Took it to Audi, who stated the battery was knackered and it had shut down systems detecting low battery voltage throwing up the fault light but there was no actual suspension fault. As it is an AGM (absorbent glass mat) battery a genuine replacement would be in the region of £250, but they would do it for £150.
But as a bonus, they then said that it would be replaced under warranty as the car has a 5 year 90k extended manufactureres warranty purchased when the car was new.
The actual replacement battery has to be programmed to the car otherwise some of the electrical systems will not work correctly. This took about 1- 1 1/2 to fit and and reprogramme - I was lucky that it was all done under warranty.
When I was looking at the price of batteries before it was confirmed it was a warranty job, they weren't much cheaper than buying a genuine battery from Audi. Out of warranty, the reprogramming factor has to be taken into account too.
Subsequent extended warranties don't cover batteries so I am glad it decided to fail when it it did.

Banbury
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Re: AGM Battery Replacement?

Post by Banbury » Sun Jan 12, 2020 6:37 pm

That’s a great idea. Also appreciate the heads up on the coding. 👍

RSrichmond
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Location: Aberdeenshire

Re: AGM Battery Replacement?

Post by RSrichmond » Fri Jan 17, 2020 2:14 pm

Hi there, my rs4 b8 sat in the garage last year only moving to run and free up brakes etc. The day it was booked in for MOT & service it threw up a suspension fault code/warning. After its test I gave it a long drive to charge up battery but same thing happened following day, Also noticed the MMI screen border went from orange to red. Changed the battery myself with one from eurocar parts! Instantly the red changed back to orange and has been perfect since. I had also heard that the battery would need re-programming, but I took the chance and Everything works as it should.
Rs4 b8 Sepang blue

Banbury
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Re: AGM Battery Replacement?

Post by Banbury » Sun Jan 19, 2020 10:54 pm

RSrichmond wrote:
Fri Jan 17, 2020 2:14 pm
Hi there, my rs4 b8 sat in the garage last year only moving to run and free up brakes etc. The day it was booked in for MOT & service it threw up a suspension fault code/warning. After its test I gave it a long drive to charge up battery but same thing happened following day, Also noticed the MMI screen border went from orange to red. Changed the battery myself with one from eurocar parts! Instantly the red changed back to orange and has been perfect since. I had also heard that the battery would need re-programming, but I took the chance and Everything works as it should.
Great info’. I was going to book into Cheltenham Audi but will try this first.👍

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