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Thread: Battery replacement

  1. #1
    rxsevn89 is offline Site Upgrade Donor
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    Battery replacement

    Hey guys, I have a 2006 Cayman S and my factory OEM battery took a cr-p on my yesterday. I live in the middle of montana and the closed dealer is $ hours away. I called them to see if my battery was coveered under warrenty and they told me it very hard to get Porsche to warrenty it. It has a bad/dead cell and wont hold a charge. I cant find a replacement size for it anywhere in town. Does anyone know what battery code it is for a replacement at like Checker? Or should I call porsche and have them come get it and send it to the nearest porsche dealer to try to have it warrantied. I need some advise. Thanks


  2. #2
    blueone's Avatar
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    Re: Battery replacement

    Interstate sells a replacement, MTP-H8, though I can't believe you'll just find one sitting around in the middle of Montana. Do you have an Interstate distributor nearby? (The Yellow Pages would be the best bet.)

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    Re: Battery replacement

    The battery in my 2006 CS was replaced without any debate under warranty about 3 months ago, but of course, YMMV.
    Dan
    National PCA DE Instructor
    2006 Cayman S 3.8L 997S X51 Turbo

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    Greywolf is offline Site Donor
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    Re: Battery replacement

    A local Porsche club member tells me that Auto Zone has a replacement that works for Boxster/Cayman. Rather cheaper too. No idea how well they hold up in a 987.
    Les

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    Re: Battery replacement

    Now would be a good time to get an Odyssey and save 25 lbs. Rennline has the battery hold-down tray for it.
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    Re: Battery replacement

    Replaced my battery a month or 2 ago for my '06 Boxster. No warranty coverage. Just under $400 installed by Porsche with my PCA discount (like $380 or so).

  7. #7
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    Re: Battery replacement

    I put a Duralast from Autozone in my last Boxster and it was reliable and under $100 - it was made for the application, with the vent tube and all.
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    Re: Battery replacement

    I have a 2005 Boxster S and I just had my battery replaced because it was over 4 years old. My ind. put in a 72 mo. Interstate battery for $120.

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    Greywolf is offline Site Donor
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    Re: Battery replacement

    Just a thought on after market batteries. Make sure the hold down clamps really do. Duralast in my old 944S2 had hold down lips just enough thinner the battery could bounce a little. Not good for battery life. Sheet of thick plastic solved it quickly.
    Les

  10. #10
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    Re: Battery replacement

    My 2006 Cayman S battery was replaced last year free of charge at my dealer. They hooked my car up to the PIWIS and said basically that my car hadn't just been sitting around as a garage queen so I qualified for a free replacement battery because I drove my car reguarly. I don't know how much that goes into "convincing" Porsche to replace the battery for free while under warranty but if you drive your car I don't see why it wouldn't be covered as it is not excluded under warranty coverage as far as I can tell. Please check your warranty area of your owner's manual for full details.

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    Angry Re: Battery replacement

    The factory Moll battery in my '08 CS went dead after a year. Wouldn't take or hold a charge. I talked to the local Porsche dealer about warranty replacement and it seems to be a gray area. You have to drive the car in and they will check the mileage, etc. They said that if the car had low mileage and you weren't using a battery tender then they wouldn't warrant it. They had a new OEM Moll replacement in stock for well over $200.

    Assuming problems getting the old battery replaced under warranty I went ahead and bought an Interstate MTP-H8 for $192. My local tire dealer got one from the distributor, which had it in stock. The Interstate is the same height and depth as the Moll but is over 1" longer (has significantly more power). That means you have to relocate the battery holddown clamp. There are four holes in the battery tray for the clamp of which three have threaded nuts spot welded to the tray. Guess which hole doesn't come with a threaded nut...yep, the one you need for the Interstate. So what you can do is take one of the four nuts that hold the battery tray in place and slide it under the left hand side of the tray with a 13 mm wrench. Then cinch up the holdown bolt for the clamp.

    Here's another thing that came up. The square headed bolt for the positive battery terminal was coated with locktight and also is a really poor design. I managed to get the nut off (in order to install a battery tender lead) but no way would it tighten all the way back up. I eventually had to hacksaw it off. No problem with the negative terminal bolt as there was no locktight on the threads. So figure on getting a new bolt if you go this route.

    BTW, I have Sears Diehard batteries in both my '73 and '83 911s and the charge level runs down to zip all the time as they are garage queens. I simply put the charger on and charge them back up and they are fine. I been doing this for years and there are no problems with these batteries. Based on this I'd have to conclude that the Moll is rather poor quality.
    '08 Cayman S
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  12. #12
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    Re: Battery replacement

    Well here in the UK the battery is only warranted for 2 years and unfortunately they are NOT the best batteries ever made. !! On a standard car it's an 80 amp/hr unit but on some with all the extras it could be a 100 amp/hr.
    Now the dealer quoted 250GBP fitted. (that's >$400) So I bought a Bosch unit for 45 + tax at trade ($75) so not the end of the world after almost 4 years.
    Oh an thats got a 5 year Warranty
    mcstin and MrFord like this.

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    Re: Battery replacement

    I'm going to rant on a little more about German cars and their electrical systems. Over the years I've owned numerous VW, Mercedes, BMW, and Porsche cars. And without exception they have all had electrical problems of one sort or another. The BMW 735i was so bad I eventually donated it to charity.

    On the other hand my daily drivers are two Subaru Outback wagons with a total of 450,000 miles. They both run like watches with minimal maintenance. Guess the Japanese have set the gold standard for reliability!
    '08 Cayman S
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    Re: Battery replacement

    My battery experience is that electro-chemical devices are stressed in extreme hot weather (now) and extreme cold weather. When I got my 06 CS last year, I insisted on a new battery as part of the deal. My experience is that battereis fail only at night, in the rain and in the middle of nowhere. Ed

  15. #15
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    Re: Battery replacement

    Quote Originally Posted by Ed Merry View Post
    My battery experience is that electro-chemical devices are stressed in extreme hot weather (now) and extreme cold weather. When I got my 06 CS last year, I insisted on a new battery as part of the deal. My experience is that battereis fail only at night, in the rain and in the middle of nowhere. Ed
    Just like a lost object is found in the last place you look.

  16. #16
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    Re: Battery replacement

    Quote Originally Posted by bigwong View Post
    Just like a lost object is found in the last place you look.
    That's because it was located in the last place you left it...

    brad
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    JimSouCal is offline Porsche Activist
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    Re: Battery replacement

    Quote Originally Posted by oldwiz View Post
    Assuming problems getting the old battery replaced under warranty I went ahead and bought an Interstate MTP-H8 for $192. My local tire dealer got one from the distributor, which had it in stock. The Interstate is the same height and depth as the Moll but is over 1" longer (has significantly more power). That means you have to relocate the battery holddown clamp. There are four holes in the battery tray for the clamp of which three have threaded nuts spot welded to the tray. Guess which hole doesn't come with a threaded nut...yep, the one you need for the Interstate. So what you can do is take one of the four nuts that hold the battery tray in place and slide it under the left hand side of the tray with a 13 mm wrench. Then cinch up the holdown bolt for the clamp.
    I've seen it done. The Interstate MTP-91 will fit the existing mount but DOES REQUIRE A VENT KIT that is not normally included.

    Many dealers use this as an alternate replacement in the CS to the OEM that is a POS. The Interstate site suggests the MTP-93 but it is the MTP-91 with the vent kit that is an easy swap out. Don't put a battery in without a vent kit or you might do a hydrogen explosion.

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    brianlbk is offline Porsche Chatter
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    Re: Battery replacement

    My 2006 cayman s (in service dec of 2006) battery also failed a couple of months ago. I called Porsche 800 number who asked me how many miles I had on my car (22,000) as the battery warranty doesn't apply for cars who are driven very little (can't remember the mileage). They came to my house on the top of a mountain with a car hauler took the car to the dealer some 40-50 miles away and replaced the battery under warranty. The dealer merely followed the instructions of Porsche. Wonderful service with no cost to me. The service was promised within hours which was accomplished. Porsche called to make sure the hauler arrived as promised and that the car was fixed as promised and called a third time for me to state my satisfaction with the overall experience-all of this happended in less than one day. My best Porsche service experience.

  19. #19
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    Re: Battery replacement

    Quote Originally Posted by brianlbk View Post
    My 2006 cayman s (in service dec of 2006) battery also failed a couple of months ago. I called Porsche 800 number who asked me how many miles I had on my car (22,000) as the battery warranty doesn't apply for cars who are driven very little (can't remember the mileage). They came to my house on the top of a mountain with a car hauler took the car to the dealer some 40-50 miles away and replaced the battery under warranty. The dealer merely followed the instructions of Porsche. Wonderful service with no cost to me. The service was promised within hours which was accomplished. Porsche called to make sure the hauler arrived as promised and that the car was fixed as promised and called a third time for me to state my satisfaction with the overall experience-all of this happended in less than one day. My best Porsche service experience.
    I believe that under 6000 miles a year is the cut off. Porsche batteries are abused by owners with too few miles driven, not driving at speeds/distances needed to charge them, leaving electronic devices plugged into hot sockets, letting the car be undriven for weeks and other abuses. Using exception man's rule my '06 is doing fine.

  20. #20
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    Re: Battery replacement

    Yeah, they will warrant the battery if the car has been driven 6,500 miles per year. The service advisor at the local Porsche dealer gave me that info plus he said to follow up with Porsche at the 1-800 number.

    My Cayman has never been driven in wet weather, which means from November through April where I live. You'd think a $60K-70K car would come with a decent battery. I guess the lesson is get a battery tender for the Moll. They cost about $50 at amazon, work great, and it will save a $200 battery replacement.
    '08 Cayman S
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