Battery knackered?

[KENZ]

My 07 Z4M been garaged all winter. It's coming out shortly so connected charger and left it on trickle/slow charge 3 amps for 5 days. Went to start the car, it started but when I switched it off the battery was dead again.

So my question is. Is the battery fecked or should I put it on fast/full charge. What warranty does these OEM battery's have. 5 Years?

Thanks for your help

[E30M3SE]

Sounds like the battery is dead, not holding charge, needs replacing.

If you were laying it up for winter and Optimate or Ctek battery conditioner should have ben attached to avoid this problem.

Battery warranty is as long as the cars warranty from new, if the battery is not the original, but a BMW battery then it will have a 2 year warranty as all other Genuine BMW parts if you bought the parts.

[KENZ]

Thanks for your help. Next stop Costco..

[KENZ]

Finally got round to ordering my battery from europarts. Anything I need to watch out for when removing the old one and fitting the new. Will I need to reset anything?

[playalistic]

You'll need to do the clock that's about it.

[The Restorer]

I know on my E46 M3 with the battery in the boot there was a breather pipe that needed to be connected up. Not sure if you will have something similar to look out for in the Z4.

[playalistic]

The Restorer said:

I know on my E46 M3 with the battery in the boot there was a breather pipe that needed to be connected up. Not sure if you will have something similar to look out for in the Z4.

Yep, you most certainly do. Although I'd considered that a given.

[b16a2_VTi]

just to add, i use a Ctek charger and it works a treat!!! kept my battery topped up!

Must say i think ive saved the battery as the engine cranks over MUCH stronger now!

[KENZ]

Battery arrived today jst to confirm for removing battery you disconnect negative then positive, to connect, positive then negative?

[Pig Skill]

Yeah that's correct.

On another note, take it very easy on the car and make the first run a good long gentle run, allowing the engine to warm through thoroughly. Don't start it up and allow it to idle. Oh, check the tyre pressures before you go out

Check for oil leaks when you get back and try the air con. Laying a car up can encourage seals to shrink. AC can often lose its refrigerant and gaskets can weep oil. Once back drop the il and fill with fresh stuff.

[KENZ]

Quickie, fitting the battery now, however the old battery is a 760amp. Where as my new Bosch is a 610amp? I went for the 5 year warranty top end battery which is supposed to give you 30% more juice.

This was supposed to be the correct battery in europarts. Any ideas?

[E30M3SE]

What is the CCA (Cold Cranking Amps) on your old battery v's new?

[KENZ]

Old battery CCA is 760, new battery doesn't have a CCA displayed. Also new battery is too short. The clamp does meet meet it.

[E30M3SE]

Is it a 027?

If so it's the same battery as fitted (recommended) for E46 CSL, amongst other, it shouldn't have any problems running your car but does have less reserve capacity, IIRC a 096 or 100 barttery is the direct equivalent to your old battery.

[KENZ]

E30M3SE said:

Is it a 027?

If so it's the same battery as fitted (recommended) for E46 CSL, amongst other, it shouldn't have any problems running your car but does have less reserve capacity, IIRC a 096 or 100 barttery is the direct equivalent to your old battery.

Yes, it's a 027, I'll need to get it returned as its too short

Edited by KENZ on Wednesday 30th May 16:48