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I'm having to buy new tires for my 2005 Porsche Boxster.  The wheel size are 17 inches.  The front wheels are 6.5 inches wide and rear wheels are 8.0 inches wide.  I currently have tires 205/55R17 on the fronts and 235/50R17 on the rears.

I would like to install wider tires to help with autocrossing without having to buy new wheels.  

Has anyone installed wider tires for these size of wheels?  I would like to install 225/45R17 for the fronts and 255/40R17 for the rears.

I know that the front and rear overall diameter need to be the same.

Thanks,

  Gilbert

This is what I was looking for.

Thanks,

Gilbert

All,

I would like to replace the OEM radio (non bose) with a double din Kenwood. Can anyone provide a link that has steps on how to remove the radio on a 2007 Porsche GT3.

Thanks,

Gilbert

Loren, Thanks for the reply. I was hoping to increase the width of the rear tires without having to buy new RIMs.

My 2005 Boxster currently have 205/55 R17 tires for the front and 235/50 R17 tires for the rear. Can I change the size of the front and rear tires for my 17 inch OEM Porsche wheels? I would like to change to 205/50 R17 for the fronts and 255/45 R17 for the rears.

Will these tires fit on my standard Boxster wheels?

Thanks,

Gilbert

That is good to hear. Thanks Silver_TT and JFP for your replies.

I had to change the 8 year old battery on my Boxster. I keep the car connected to a battery maintainer to keep the battery fresh but it eventually went bad. After replacing the battery, I got a psm failure that eventually went away. I was just wondering if there is anything else I need to reset after a battery change?

Thanks,

Gilbert

These cars have an electronic throttle set up, so it is often hard to access what the actual outcome is of a physical depressing of the pedal. The system uses a potentiometer on the pedal to send a signal to the DME, which responds by moving a servo motor at the throttle plate. Either could be the source of the issue, but because they are both expensive, you need to run diagnostics to determine what is going on. Best first move would be to hook the car up to a Porsche specific scanner (PIWIS or Durametric) and look at the actual throttle position data in response to throttle pedal movement. You can also scan the car for pending codes related to the egas system at the same time.

Do you know if this is a common problem with Boxsters? I plan on taking it to my local porsche independent mechanic to have it checked. When you say expensive, how expensive are we talking about?

Thanks for your reply,

Gilbert

The car stopped accelerating again on the interstate while cruising about 70 mph. When I pressed the gas pedal to pass another car, the car would not accelerate but was actually slowing down. I was able to get the car accelerating again by pressing the clutch down and pressing the gas. Does anyone know of any problems with the throttle (gas pedal) on the Boxsters? The engine does not stop running. It almost feels like the throttle quits working until I press the clutch then it starts working again. Very strange.

Thanks for any help,

Gilbert

I don't think I am. Yesterday, I started to rev it more before releasing the clutch when starting in 1st and it seemed to help. It did not bog down at all.

When it bogs down, the car engine does not rev up. The clutch does not appear to be slipping. If it were slipping the engine would rev higher but the car not move. When it bogs down at 1st, I have to press the clutch down and then I can press the gas and the engine revs and I can release the clutch and the car goes.

I have a 2005 Porsche Boxster that I bought used almost a year ago and noticed this problem. When I am in 1st gear starting out from a complete stop, sometimes the car would bog down. I would press the gas but no acceleration would occur. The engine does not stop. When I press the clutch down, I can rev the engine and get the car going. This also happens sometimes when shifting into 2nd. I don't think I'm accidentally shifting to 3rd instead of 1st or 4th instead of 2nd by mistake. Could the problem be that I'm not reving high enough when starting out in 1st or the rev is not high enough when shifting to 2nd? The car never bogs down otherwise. The car drives fine when in 3rd, 4th, or 5th gear. This problem does not occur all the time but it is starting to get annoying and I'm scared it might happen when I'm trying to merge into traffic.

Thanks for any help,

I found the part numbers in case someone is interested. Ordered it from gaudinporscheparts.com.

9875414450001c for left (driver's side)

9875614460001c for right (passenger's side)

I just bought a 2005 Porsche Boxster a few months ago and recently noticed that one of the plastic covers that are attached underneath the clam shell which covers the push rods is missing. The left side plastic cover is there and but I'm missing the right side plastic cover. I'm not sure how important this cover is. Maybe it provides protection for the convertible motor and push rod. I wonder if it helps with the wind noise because the missing side (right side) seems to have more wind noise when the top is up. I need help finding the part number for the missing cover so I can buy a replacement.