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Discussion summary
YOUR RESEARCHBattery life in a 996...
Leading reported evidence
Install by the po in 2003
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Performed · outcome unconfirmed · Original poster
The battery was installed by the PO in 2003, so I really did well compared to some of the horror stories I've read on short battery life.
Leading evidence: 'Install by the po in 2003' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check batteries, the oem porsche batteries are not maintenance free' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
I'm actually getting my battery replaced on Monday in my '01 996.
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Check batteries, the oem porsche batteries are not maintenance free
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Suggestion
Make sure to check your batteries, the OEM Porsche batteries are not maintenance free.
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Suggestion
We were posting about Interstate batteries and someone recommended another model number that comes up for this car on the Interstate website (this model is the MTP-91 but it is NOT the direct replacement).
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Suggestion
We were posting about Interstate batteries and someone recommended another model number that comes up for this car on the Interstate website (this model is the MTP-91 but it is NOT the direct replacement).
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35 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Outcome without a verified action link
Website says H8 for my '04 I assume GT3 makes no difference...
Approaching 3 years of ownership with MY99 coupe, and finally had to replace the battery. I was having Blizzaks removed(yea, kind of late in the year) and new Sumitomos mounted and balanced... my car was driven off the lift and parked. I paid the bill , jumped in my Porsche and nothing! The battery was installed by the PO in 2003, so I really did well compared to some of the horror stories I've read on short battery life. I replaced it with an Interstate battery that was a perfect fit.Thought I'd share. Looking forward to some 'wet' driving all weekend with new sneakers and a fresh battery.
I've got 2 1/2 years on my battery and noticed it was really low on water so I filled it up. I was surprised it took almost 1/2 a gallon. I hope to get quite a bit more out of it.
Make sure to check your batteries, the OEM Porsche batteries are not maintenance free.
also make sure you lock the vehicle if you are keeping it in the garage for a few days. There is more parasitic power drain with it unlocked than with it locked and the alarm system armed.
my boxster battery is toast after 3.5 years. if i let it sit for a week or 2 w/o driving it, i can't start it. I put the trickle charger on it and it's fine
I did notice an improvement(or at least I think I did), it's crisper and feels more energetic, but I'm not sure if it's measurable or not in the real world. My Porsche always 'feels' better after a wash or an oil change as well.Hard to quantify, but I'm glad I've got a new battery.
Yes, and I would do it again.
This topic has been beaten to death but here is some of the best info you will find from another thread......Ok, it was my post so I might be a little biased but it doesn't make it any less true.
We were posting about Interstate batteries and someone recommended another model number that comes up for this car on the Interstate website (this model is the MTP-91 but it is NOT the direct replacement). Here was my response;
This is the same thing I discovered via the website. Totally prepared I walked in and said "I need the MTP-91". The guy looks at my $225 22 month old POS Porsche boat anchor and says "why do you want a physically different battery, the H7 is the IDENTICAL case, handles, and location of the vent tube connection whereas the -91 is not". I had him bring both to the front and sure enough, two different animals.
Don't pay any attention to the website. Go to your local Interstate location and put your dead one next to them and you will see. H7 is the one. I believe it has an 85 month warranty.
Most importantly...DO NOT BUY ANOTHER OEM BATTERY
. Unless you want to join the scores of us who made that mistake. My original one died early and the replacement made it about 22 months and the dealers will not stand behind them. My local one even confessed that the OEM is crap. Should have just burned the $225 in the fireplace so I could have gotten some enjoyment out of it.
.
Honestly, I ended up getting mine off Amazon. No shipping charges and no tax.
It's the Red-top 95, I believe. 95R if you want the posts in the back. It really is as easy as drilling 2 holes, and throw a couple of bolts in there, then slap the tray and battery back into your car.
Here's a link to Rob's DIY for those who are new.
https://rennlist.com/forums/996-foru...a-battery.html
I know it is hard to believe, but I got
8 years
out of my OEM batttery! I bought the car new in 2000 and just replaced it last summer. 35k miles, not drivven in the winter, and kept on a trickle charger.
That's because I'm hiding under my sofa - which is what I do whenever I see any posting relating to a Porsche battery.
Let's just say I expect my battery maintainer to outlast my battery.
I'm actually getting my battery replaced on Monday in my '01 996. I had an Interstate battery put in 12 months ago (don't know model number) and it's dead already. My wife thinks the mirror light may have been left on. Now it's so drained that the car will barely run after being started. What's the deal w/ OEM batteries? Shud I request to not get one? I'm getting it changed at a Porsche dealership.
How often do you drive it? How many miles? Where did you buy the Interstate battery? They should prorate it. Also, don't buy a battery from Porsche.
I'd get one of the batteries discussed here and then invest in a trickle charger, which has also been discussed at length.
Porsche OEM batteries have well-known problems. I think a lot of them are exceeding their shelf life sitting at the dealer. Some Porsche dealers don't even carry them anymore.
Just looking at the Optima website, and was wondering if 34R was the way to go. I did not see 95 or 95R as mentioned above. Perhaps they renumbered their line?
I have a Porsche genuine Parts charge-o-mat (000 043 202 56) battery tender that I bought 6 years ago. I drive the '01 weekly but more like monthly in the winter. Is this tender not good enough and that is why the battery drains?
Wow - a weekly driver, on a trickle charger and it
still
died in 1 year? I think I'd start another thread, but it sounds like there is a drain [obviously] somewhere.
Is your car fully stock? No aftermarket alarms, Lojacks, or stereo equipment?
Might be an alternator issue. I just went through this with the GT3. I've got an unused remanufactured 996
alternator
available at a very good price if you need one.
it's fully stock......I'm taking it in tomorrow. The service guy mentioned it may be an alternator problem when I spoke to him to set up the appointment. Again, my wife "thinks" she may have left a rv mirror light on it.
