I have looked on here for a replacement battery for my 2003 996. It seems the Interstate is the brand of choice but am having trouble locating one for the 996. I have looked on the interstate website and the battery for the '03 996 is either MT-49 or MTP-93.. I have seen numerous posts on here that people are using the MTP-91. i am confused by this. I just want to install the best compatible battery for my car and be able to install without hassle of drilling holes etc. Just slide it in and hook up the vent. Thanks......

 

http://www.renntech.org/forums/index.php?showtopic=2950

If you have the original Moll then look at it to see the amp hour rating. It should be 80 or 70. The 80 amp hour battery is larger than the 70. The Boxster uses both sizes. Not sure about the 996.

 

I think I have the 91, but I just went to local tire place and they carry Interstate so they looked it up for me. I think it comes down to size and the 91 is smaller than the Moll was. The 93 is larger but I believe it doesn't matter too much and one can use either, its preference. I asked about the larger one, but they didn't have one charged and ready.

 

I just replaced mine on the weekend as well....went with the OEM one...I know, I know ....over priced for what you get.....but this was my first time and I didn't have confidence in the local auto shop....

Anyways, word of caution....You will noticed that I have posted on Rennlist that I did this and now my key remote won't work (both storge area and main doors/security system)...not sure if I have to go to the stealer to get everything reset or if I can do it myself as people have suggested....Will have to wait until I get home .... and Yes I did read the manual.....

 

Thanks for the replies.. I am finding it impossible to find the Intterstate Batteries in stock anywhere. Went on the interstate website and have check 10 places already nearby and none carry it. I did call Pep Boys about the Bosch battery i read on here but am also confused as to which model to use on this one. They have a size 48 and a size 49 battery, on this sight i see people talking about the Bosch group type 94? Is this just a case of dyslexia?

 

I replaced my battery in my 03 a few months ago. After too much worrying, I discovered that most of the batteries for the car were made by Johnson Controls, regardless of brand (including Bosch, if I recall correctly). Therefore, I bought the cheapest one made by Johnson Controls that I could find, which was at Costco. I bought whatever size was on the chart there. It was slightly smaller than the Moll OEM battery but very easy to fit. I blew something like $12 for a 9 volt battery tender that plugs into the lighter.

Very simple. Very cheap.

If you install it yourself, be sure you get the vent tube that is supposed to accompany the battery. They seem to disappear, and I have heard some people say that an installer failed to fit a vent tube.

Update: I just looked at my post from over on Renntech. I bought a Group 48, and the battery maintainer was $5.

 

DCP, did you have any issues with the key remote, after you replaced the battery????

 

No. No problems.

 

I wasn't so lucky...

 

That is unfortunate. I hadn't seen that problem when I reserached replacing my battery. Guess that possibility makes getting the battery maintainer a good idea for a do it yourself install.

 

Yes, I already bought one....

 

I am finding it impossible to find the Interstate Batteries in my area in stock. Where did u guys find them? Also, i have a 2003 and the interstate website recommends the MTP-93 which has 850 Cold start Amps but weighs 45 lbs. I see that a 1999-2001 recommended battery is the MTP-91 which has 700 Cold start Amps and weighs 36lbs. I cant find how much the stock Moll battery has in terms of cranking power but from what I've read its not great. I would much rather have the smaller, lighter battery but not sure if its a mistake.

I can get hte Bosch group 48 or 49 batteries at Pep Boys for $90 but no nothing about them. Anyone know how they compare to the interstate battery and in terms of dimensions, weight and cranking amps? Thanks, I want to ensure I'm buying the right battery and not regret this later..

 

Great News ( atleast on my end) everything is back to normal.
Tried the key remote tonight and everything is back working as it should.
No visit to the stealer so I figure Im up a couple hundred...LIFE IS GOOD AGAIN.

Now if I could figure out hoe to post a pic. or two I would..I give it a try and see what happens...

 

You mean to tell me you haven't posted a pic yet???? How the hell did you get by me???? Oh man, the guys are going to be all over my *** for not giving you the old.... Come "newbie" post the !@$%^&* pics!!... speech!

OK, ask and ye shall receive! Here are my "can't miss" instructions for posting a pic. These instructions have NEVER failed to help someone post pics, so the pressure is on YOU to keep my string alive!

All words shown in BOLD indicate buttons. If you are just doing a "Quick Reply" you will have to click on Go Advanced button. Then follow the steps below:

Down below the part of the screen where you type the text and below the Submit Reply, the Preview Post, and Spell Check buttons, there is a Miscellaneous Options section followed by an Attach Files section.

In the Attach Files section, click on the Manage Attachments button.

You will now get a pop-up window. There are 3 buttons Browse, Upload, and Close this Window.

Click on the Browse button and now (in a new pop-up window) you can search on your PC to locate the pic you want to attach. Click on the name of the file you want and then click the Open button. Now click on the Upload button. After the file has been uploaded, you can click on Browse button and repeat the process to upload another pic or click on the Close this Window button.

After you click on the Close this Window, you will be back to the original "message" screen. Your pic file should be listed just above the Manage Attachments button.

If you are finished typing the text, you can click on the Submit Reply button and everyone will be able to see your great looking P-car!

If your pics are too large, you can resize them with MS Paint, or PhotoShop software, or you can do it online at this web site. http://www.resize2mail.com/

 

If you have the oe Moll battery have you looked at it to see the amp hour rating in order to determine the replacement size? The cranking amp rating is also on the battery.