New battery time..which one please?
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New battery time..which one please?
Having read a few old threads I'm confused. Its for a 2007 M Coupe which I believe came with an AGM battery but from what I've read is not required...
Can someone please tell me which battery to get!?
I see ECP have 34% off at the moment but they're telling me to buy an AGM one for £275 (before discount)
Wheras Tanya tell me to buy a non AGM for £73. Is this any good?
https://www.tayna.co.uk/096-Enduroline- ... P8383.html
I've noticed Costco sell Bosch batteries, but I've no idea if they are a good price, or which one I'd need.
Sorry, I'm clueless when it comes to electrics
Can someone please tell me which battery to get!?
I see ECP have 34% off at the moment but they're telling me to buy an AGM one for £275 (before discount)
Wheras Tanya tell me to buy a non AGM for £73. Is this any good?
https://www.tayna.co.uk/096-Enduroline- ... P8383.html
I've noticed Costco sell Bosch batteries, but I've no idea if they are a good price, or which one I'd need.
Sorry, I'm clueless when it comes to electrics
- ph001
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New battery time..which one please?
I think the E85/E86 M cars came with an AGM battery as std AFAIK but there is no battery managment module fitted (IBS) so you can replace with a conventional wet cell type without issue. The Bosch Silver are a popular choice but basically any 096 style battery will fit.
The bottom of the range (but still good quality) would be something like this..
https://www.ebay.co.uk/itm/Powerline-09 ... Swvk9ZiDId
The Varta Silver calcium are a good step up in quality...
http://www.ebay.co.uk/itm/096-Bosch-Equ ... rmvSB=true
And the Bosch Silver S4 008 or S5 008 at the top (the S6 is the AGM but really not worth the expense imho).
I would put precedence on the CCA (cold cranking amps) over anything else.
The bottom of the range (but still good quality) would be something like this..
https://www.ebay.co.uk/itm/Powerline-09 ... Swvk9ZiDId
The Varta Silver calcium are a good step up in quality...
http://www.ebay.co.uk/itm/096-Bosch-Equ ... rmvSB=true
And the Bosch Silver S4 008 or S5 008 at the top (the S6 is the AGM but really not worth the expense imho).
I would put precedence on the CCA (cold cranking amps) over anything else.
Last edited by ph001 on Thu Dec 07, 2017 1:09 pm, edited 2 times in total.
2007 E85 Z4 3.0Si manual 
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.

19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.
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New battery time..which one please?
Thanks for taking the time to help
I put a Varta in my E46 M3 which has been good, so I will go for one of those I think

I put a Varta in my E46 M3 which has been good, so I will go for one of those I think

- ph001
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New battery time..which one please?
Yeh, Varta have a great rep. I might be tempted for the sake of £2.50 to go for the E44 which is directly comparable to the Bosch S5 (specs are identical) http://www.ebay.co.uk/itm/Varta-E44-577 ... xyOlhS1eLS
2007 E85 Z4 3.0Si manual 
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.

19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.
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New battery time..which one please?
Yes it's the E44 I have in the M3
- srhutch
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New battery time..which one please?
I replaced mine with a standard battery. No point paying extra for AGM on a ///M E85/6
I bought a Bosch from the S4 series. Can't remember the model though.
I bought a Bosch from the S4 series. Can't remember the model though.

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New battery time..which one please?
I went for the Varta E44 - shame prices have gone up 50% since I bought my last one 2 years ago though
- ph001
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New battery time..which one please?
Great choice
Lead prices have gone silly over last couple of years and the weak pound certainly aint helping.

2007 E85 Z4 3.0Si manual 
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.

19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.
- dhobbs
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New battery time..which one please?
When you replace the battery, do you have to reset anything? Such as the radio or Windows one-touch?
3.0si roadster. Requisite stubby. Sound gen mod. LED numberplate lights. LED boot strip. Interior lights LED too. Dension. ZHP gearknob. Daily drive 
Motor in boot now! Bilstein b12 kit now fitted.

Motor in boot now! Bilstein b12 kit now fitted.
- ph001
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New battery time..which one please?
Yeh, clock and windows are the usual ones. Simple enough.
2007 E85 Z4 3.0Si manual 
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.

19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby
2004 E46 M3 coupe manual.
- Beedub
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New battery time..which one please?
Stock AGM for me...
But understand this is expensive, they last a very long time as many are still using their factory unit.
But understand this is expensive, they last a very long time as many are still using their factory unit.
Ti silver Z4m Roadster... Homing in on a decade of ownership.... my absolute pride and joy.
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New battery time..which one please?
I thought that an AGM Battery was fitted by BMW to the Z4M coupe because the battery is located inside the car within the passenger compartment, and to reduce potential issues with battery venting gases inside the car, an AGM was fitted.
Not sure how critical this is, but would imagine that a faulty battery might emit some not so healthy gases into the car. If so not sure though how much an AGM battery would prevent this.
Not sure how critical this is, but would imagine that a faulty battery might emit some not so healthy gases into the car. If so not sure though how much an AGM battery would prevent this.
2007 Imola Red Z4M coupe. Owned for 10 years.
Other current car: 2006 BMW 335i SE Coupe - Titan Silver, Black Leather - daily driver
Just sold: 2007 Porsche 911 997 Carrera 2S. Meteor Grey, 19" SportClassic 'Fuchs' style wheels, PSE.
Other current car: 2006 BMW 335i SE Coupe - Titan Silver, Black Leather - daily driver
Just sold: 2007 Porsche 911 997 Carrera 2S. Meteor Grey, 19" SportClassic 'Fuchs' style wheels, PSE.
- abar121
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New battery time..which one please?
Get an AGM if you leave the car for long periods. I fitted a Varta AGM batter a couple of years ago and the car is great.
I've tried new conventional vs AGM batteries on motorcycles and the benefits are really worth it.
I've tried new conventional vs AGM batteries on motorcycles and the benefits are really worth it.
'07 Z4M Interlagos Blue. All options except extended leather.
- TomK
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New battery time..which one please?
No that's not true, there is a vent pipe which goes to the outside which connects to the battery.nickw6666 wrote: ↑Fri Dec 08, 2017 11:37 amI thought that an AGM Battery was fitted by BMW to the Z4M coupe because the battery is located inside the car within the passenger compartment, and to reduce potential issues with battery venting gases inside the car, an AGM was fitted.
Not sure how critical this is, but would imagine that a faulty battery might emit some not so healthy gases into the car. If so not sure though how much an AGM battery would prevent this.
Fwiw my stock battery (which was still fine when I changed it for something lighter a couple of years ago) was not agm, some cars seemed to come with them from the factory some didn't, I guess it's whatever they had lying around at the time as this was the time that stop/start was being introduced on e90 etc.
I don't think there's any technical reason to be buying an agm for these cars myself.
MC IB, CSL intake, Schrick 288/280 cams, SS race bbox, APs, RS-29s, Apex ARC-8, AD08-Rs, Bilstein B12, Turner arms & RTAB limiters, Vibratec mounts, Rogue pulleys & RSMs, Sparco carbon w/ 6 point, CDV delete, UUC ssk, M5 gearknob, oem strut
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New battery time..which one please?
Not a fan of AGM batteries personally!
My 123d with stop/start had one, and it needed replacing after only 4 and a half years and 55K miles! And because it had to be coded on the OBD it cost just over £250 in total!
Whereas my Z4C seems to have had it's first battery in 10 years last winter for around £100! It was an OEM one, which my local BMW Indy tells me is an Exide (not the Bosch I would have expected, but then the car was built in the USA).
My 123d with stop/start had one, and it needed replacing after only 4 and a half years and 55K miles! And because it had to be coded on the OBD it cost just over £250 in total!

Whereas my Z4C seems to have had it's first battery in 10 years last winter for around £100! It was an OEM one, which my local BMW Indy tells me is an Exide (not the Bosch I would have expected, but then the car was built in the USA).

Z4 3.0Si Sport - Coupe for added stiffness!
Current - Montego Blue, Pearl Grey & 108Ms. Cruise, Storage and pdc. E91 325i as a DD.
Gone - Ruby Black, Pearl Grey & 135Ms. Xenons, heated seats and Professional speakers.
Current - Montego Blue, Pearl Grey & 108Ms. Cruise, Storage and pdc. E91 325i as a DD.
Gone - Ruby Black, Pearl Grey & 135Ms. Xenons, heated seats and Professional speakers.