Technical Fiat 500 Stop Start Battery

[sammy19]

Hi, The stop start function is not working, I have charged the battery and it did work on the day I reconnected it but the following day it was not functioning again . The battery fitted is a Yuasa YBX7027 12 volt 65amp, is this the correct battery for this car, the battery does start the engine ok at all times but it seems it is the most likely cause of this problem and if I force stall the car it does restart. Any suggestions for a better battery, the one fitted is an AGM.

 

[varesecrazy]

I bought a New battery for my 500 in December.. went for an AGM type as I plan to keep the car

£94 from Tayna, it was the 5 year warranty that convinced me

Some were 3 years.. and £20 more

 

[Piccolo Nero e Bella]

It does sound like your battery is pretty tired - S/S is always the first thing to go. A quick look suggests the Yuasa YBX7027 is actually an EFB type.

I had to do a lot of research in 2017 when I was looking for the right battery for my car; few battery retail suppliers in AU had any idea what they were talking about and they all used the same reference material which didn't even cover my Twinair. FIAT were no better by the way! Eventually I got into contact with the Delkor sales rep for SE Asia who kindly researched it and advised the EFB was correct and recommended a retailer.

If I were buying one now I'd stick with the EFB for FIAT's basic S/S system. Choices over here are somewhat limited compared to your market and I really don't bother looking for the cheapest - spread over the six years (so far) that I've had the current battery the cost isn't significant.

 

[Baughkat]

Hi. My car is 2013. I have a s/s button which I have never knowingly used. My battery needs replacing and i dont know if i need a battery with s/s capability .thank you for replying

Hi do i have to have s/s battery for my fiat 500 2013. Halfords showing me two one s/s one not.. need to buy today. Thank you

 

[Piccolo Nero e Bella]

Hi do i have to have s/s battery for my fiat 500 2013. Halfords showing me two one s/s one not.. need to buy today. Thank you

If you're not fussed about the S/S working a non-S/S batttery will do fine - you can always switch the S/S off and on a 2013 it should stay off without needing to be switched every time you start the car.

 

[varesecrazy]

My Tayna one will arrive Tomorrow
'Overnight service '

 

[Baughkat]

If you're not fussed about the S/S working a non-S/S batttery will do fine - you can always switch the S/S off and on a 2013 it should stay off without needing to be switched every time you start the car.

Thank you so much for your help, it is much appreciated

 

[jrkitching]

There are basically two differences between S/S and non-S/S OEM fitments; the EFB S/S battery can be safely charged at a higher rate, and is capable of a greater number of charge/discharge cycles before failure. All else being equal, the EFB battery will be longer lasting, irrespective of whether S/S is fitted or used.

Both are flooded cell 12V lead-acid batteries, and when first installed, both should give the same performance. However, if you fit a non-S/S battery and don't disable S/S in the menu, it likely won't last anything like as long. Bear in mind also that the S/S 500 has a higher output alternator, and a non-S/S battery, if significantly discharged, might be compromised by the increased charge rate.

Figures I've seen suggest an EFB battery is good for about 70,000 starts, as opposed to 30,000 for a standard one.

Another thing to bear in mind is that fitting a non-S/S battery to a S/S equipped car will likely invalidate the battery warranty, irrespective of whether you actually use S/S or not.

 

[Baughkat]

Thank you so much for your help, it is much appreciated

Hi bought a new battery without s/s but car still not working

 

[Piccolo Nero e Bella]

Not working in what way?

 

[andrewpsmith]

I just put a new battery in my Fiat 500 1.2 (2017) which also has start/stop. I was having trouble with the start stop which is what lead me to change it . I fully charged the battery and it appeared to charge OK, I tested it with a battery tester and it said it was fine also, but in the end I decided it was the most likely cause of problems so given that it was 6 years old just changed it anyway as it was certainly at the end of its life. The battery had never been changed so was the original fiat Part 51980577 (EFB 60Ah / CCA 500) . The original battery was manufactured by EXIDE so I replaced it with another EXIDE battery. EXIDE EL600 (60 AH / CCA 640) from Tanya Batteries. The new battery cost around £100 and delivered next day. I'm no expert on batteries but I believe the EFB technology is slightly different to AGM. Either way it has solved my start/stop problem. The EXIDE EL600 is the same dimensions as the YUASA battery mentioned (242x190x175) so I assume is a direct swap.

 

[Baughkat]

Not working in what way?

Hi, it turns over but doesnt catch. Dont know what to do next

 

[Piccolo Nero e Bella]

Ah, you hadn't mentioned having problems starting the car - you'll be needing the services of a mechanic who can diagnose the fault and advise. Do you have a regular service place you can get it towed to?

 

[varesecrazy]

@Baughkat

Tell us about your car... its possible we can help without paying for a mechanic

2 basic questions before we start :

Had it long.. any similar issues before?

Is it the same with BOTH KEYS?

Charlie - near the M4

 

[Baughkat]

@Baughkat

Tell us about your car... its possible we can help without paying for a mechanic

2 basic questions before we start :

Had it long.. any similar issues before?

Is it the same with BOTH KEYS?

Charlie - near the M4

Hi i have had my car since since 2016 when it was three. I only use one key. Should I try and find other key.? I have had no problems apart from having a new tyre a week ago. Last week I reversed out of drive and it stopped with a clunk. Message said stop start unavailable. I was in middle of road so turned it on and managed to put it back on drive. I phoned a mobile mechanic who came and it worked so he said it could have been damp. He was here 10 mts. Next day it wouldnt start again but I read about stop start which I have never used and thought it must need a new battery as original still in it. I got the battery but it still wont work. It starts but engine doesnt catch. I dont know what to do know. Thank You for getting in touch with me.As you have probably guessed my knowledge of cars is minimal.

 

[chris3234]

Hi i have had my car since since 2016 when it was three. I only use one key. Should I try and find other key.? I have had no problems apart from having a new tyre a week ago. Last week I reversed out of drive and it stopped with a clunk. Message said stop start unavailable. I was in middle of road so turned it on and managed to put it back on drive. I phoned a mobile mechanic who came and it worked so he said it could have been damp. He was here 10 mts. Next day it wouldnt start again but I read about stop start which I have never used and thought it must need a new battery as original still in it. I got the battery but it still wont work. It starts but engine doesnt catch. I dont know what to do know. Thank You for getting in touch with me.As you have probably guessed my knowledge of cars is minimal.

Have you ever had the timing belt replaced in your ownership ?


Also has this been checked to see if it's still intact?

 

[Baughkat]

Have you ever had the timing belt replaced in your ownership ?


Also has this been checked to see if it's still intact?

No to both of those questions. Should I look into this.

 

[varesecrazy]

Cambelt.. yes its due one.. due to Years of degrading

BUT the risk is of it breaking.. unlikely that is your problem..as it has now done this more than once


Ok..
Your car is it a manual..or an auto?

The 2 obvious reasons for a Petrol engine not starting are

No Spark or no Fuel

Listen when you turn the key to the 1st position..is there a whitring noise from the back seat ( fuel pump)

Look at the Dashboard display too

Is there a Padlock ..or Key.. symbol?
(Immobiliser)

 

[Piccolo Nero e Bella]

The "Stop Start Unavailable" message is misleading, suggesting to the uninitiated there's a fault with S/S when in reality it just means the system won't allow S/S to work while some condition exists somewhere in the car. In this case it's caused you to purchase a battery you may not have even needed.

I wouldn't presume to offer advice on your problem while there are a lot of much wiser heads available here. Good luck with it!