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Axxess AX-PO90052 Wiring Interface

Connect a new car stereo and retain the factory amp and steering wheel controls in select 2005-09 Porsche vehicles

Item # 120PO90052

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Item # 120PO90052

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C$469.99
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About the Axxess AX-PO90052 Wiring Interface

Axxess AX-PO90052

You want to upgrade the stereo in your 2005-09 Porsche, but you don't want to lose important factory features. Axxess' AX-PO90052 interface retains the steering wheel audio controls, along with the Porsche M.O.S.T. 25 amplifier. It also provides a 12-volt accessory output and maintains your retained accessory power (R.A.P.) feature, as well as providing the navigation connections (reverse, speed pulse, and parking brake) that you'll need to install a car stereo with GPS. 

Product highlights:

  • retains steering wheel audio controls and factory amplifier
  • maintains retained accessory power (R.A.P.) and warning chimes
  • provides 12-volt accessory output (not present in factory harness)
  • provides navigation connections (reverse, speed pulse, parking brake)
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # AX-PO90052
KEEP READINGREAD LESS

What's in the box:

  • Radio replacement interface module
  • Amplifier interface module
  • Steering wheel control interface module (ASWC-1)
  • CTS-P005.2M wiring harness
  • Steering wheel control harness
  • LD-SWC-F3.5 harness
  • Installation Instructions

Customer reviews

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Axxess AX-PO90052 Wiring Interface reviews

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Tech support on installation

Crutchfield customer from Silverthorne, CO on 7/7/2019

2005 Porsche 911

Verified customer (What's this?)
Verified employee purchase (What's this?)

The wiring was set up and helped greatly with the installation. I did have one question that was resolved with a call to tech support. Michael was very helpful.

Pros: Great system. Sound quality is very good.

Cons:

Crutchfield response on

0 of 0 found this helpful

Axxess AX-PO90052 Wiring Interface

Crutchfield customer from Saddle River, NJ on 6/4/2019

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Slightly confusing overall, but with the help of the support team, installation went well

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

OK product, great support!

Erik from Denver, CO on 5/14/2019

2008 Porsche Boxster

Verified customer (What's this?)
Verified employee purchase (What's this?)

Installed this interface in a 2008 Boxster S with BOSE system. The first wiring harness I received would not output sound. After spending almost 2 hours on the phone with Axxess (checking voltage on multiple wires), it was determined that the wiring in the harness was messed up in some way. Their 'fix' was to have me contact the company I ordered from. I immediately called Crutchfield and explained what was going on. Without hesitation, I was overnighted a second kit, which worked correctly. I was able to get my car back together before the weekend. Big thanks to the team at Crutchfield. 5 star service, 2.5 star product.

Pros: 100% plug and play with factory wiring. No splicing needed on car side.

Cons: -Wiring might be incorrect -Expensive -Large interface boxes/connectors hard to get into radio location behind new head unit.

Crutchfield response on

0 of 0 found this helpful

Axxess AX-PO90052 Wiring Interface

Crutchfield customer from Alpharetta, GA on 4/27/2019

2005 Porsche Boxster

Verified customer (What's this?)
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Perfect fit. Worked with OEM harness. Highly recommend crutchfield to mate with radio harness.

Pros:

Cons: Tight fit with all three connction boxes installing with the HU in vehicle.

Crutchfield response on

0 of 0 found this helpful

Perfect for Porsche 997

Crutchfield customer from Kent, OH on 1/15/2019

2005 Porsche 911

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Installed this in a 05 Porsche 911 997 with the 680 Bose sound system option. Replaced original PCM with Pioneer AVH-211EX. Fit together perfectly. No cutting or modification to original wiring. Just plugged it in and worked. Microphone can easily be put on steering column if so desired. My 997 does not have steering wheel sound control but the wiring harness has all the adaptors to make that work if your model has that option. Also no way to plug it in wrong. All the plugs are different so pretty idiot proof.

Pros: Plug and play. No modification to original wiring - so original PCM can be reinstalled easily.

Cons: A bit expensive but well worth the cost in time saved and no modification of original wiring.

Crutchfield response on

0 of 0 found this helpful

Axxess AX-PO90052 Wiring Interface

Crutchfield customer from Lindenhurst, IL on 8/5/2018

2006 Porsche Boxster

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Very pleasurable experience It all worked as easy as they said Very happy Good company and great helpful people

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

Almost perfect but still great.

Shawn from Tyler, TX on 8/2/2018

2007 Porsche 911

Verified customer (What's this?)
Verified employee purchase (What's this?)

Works very well. Instructions are a bit sparse and pieces are not labeled. You basically lay everything out and sort through what's what by process of elimination. However, once connected it works seamlessly. On my 997 I did have to wire the cars antenna wire directly to the accessory power NOT to the radio as instructed. Otherwise my FM reception was bad. Crutchfield tech wasn't aware of this issue but we figured it out by chance. For half the price of comparable NAV-TV kit this is awesome.

Pros: Easy to install Simply works.

Cons: Instructions are bare minimum and could really be made better simply by labeling parts to match descriptions in instructions.

Crutchfield response on

0 of 0 found this helpful

It gets the job done.

Mike from Brooklyn, NY on 7/26/2018

2007 Porsche Boxster

Verified customer (What's this?)
Verified employee purchase (What's this?)

I purchased this so that I can replace my OEM headunit with a Pioneer AVIC-W8400NEX. The sound in the car is much lower now and the bass isn't what it was with the OEM headunit. I don't know if it needs to be tuned (beyond tuning in the settings of the new headunit) or what. I followed the instructions to the letter but i think i need to take it to a professional sound shop. Certain functionalities, like showing the name of the song on the digital dash, doesn't work anymore either.

Pros: Easy to install

Cons: not quite sure.

Crutchfield response on 7/30/2018
Once we saw this review, our Tech Support team reached out to Mike to help him further. We'll either help him get the interface working the way it should, or help him return it for an exchange or refund.

0 of 0 found this helpful

Axxess AX-PO90052 Wiring Interface

Crutchfield customer from Glencoe, IL on 7/20/2018

2007 Porsche 911

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Like a previous reviewer said, the harness does not connect the Porsche antenna amplifier. After contacting Crutchfield support, I was told to cut the antenna amplifier wire off the Porsche plug and splice into the harness. Otherwise, the interface works and I'm happy to have a modern head unit.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Axxess AX-PO90052 Wiring Interface

Crutchfield customer from Reston, VA on 7/15/2018

2007 Porsche Boxster

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Wiring harness did not support the Boxster antenna amplifier power connection. Axxess support admitted the problem and told me how to mod the Boxster wiring harness to get it to work but that isn't really ideal. Other than that issue the product works great.

Pros:

Cons:

Crutchfield response on

1 of 1 found this helpful

Axxess AX-PO90052 Wiring Interface

Thomas from Fernandina, FL on 6/30/2018

2007 Porsche Cayman

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Verified employee purchase (What's this?)

The Axxess wiring interface made installing an aftermarket head unit in my Porsche with Bose very easy. I was a little afraid of trying to doing it myself after talking to the stereo shops but it was really easy. The harness came almost prewired. All I had to do was connect the interfaces to their plugs and wire the harness to my head unit and connect the rca's to the front left and right on the back of the head unit. 5 star audio has a video to show you how to remove your factory head unit but they used Nav tv instead of Axxess. But the video will help you with the install.

Pros: Easy to install, uses the factory Bose fiber optic amp, works flawlessly.

Cons: The factory Bose fiber optic amp doesn't give you a lot of volume like a aftermarket amp would. But it's enough to sound good. If you want a super loud system you may want to use the Axxess factory amp bypass kit and buy an aftermarket amp.

Crutchfield response on

2 of 2 found this helpful

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Pros:

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More details on the Axxess AX-PO90052 Wiring Interface

Stacey B.

Product Research

Features

Vehicle Compatibility: The AX-PO90052 radio replacement interface module from Axxess Integrate allows you to replace the factory radio in select 2004-2009 Porsche vehicles featuring a stock M.O.S.T. 25 amplifier with an aftermarket head unit, while retaining important factory features.

Make Model Year
Porsche 911 (997) 2004-2009
Boxster (987) 2004-2009
Cayman (987C) 2004-2009

Retained Factory Features: The Axxess Integrate AX-PO90052 retains the following OEM features in your vehicle after you have replaced your factory radio with an aftermarket head unit.

  • Factory Amplifier: The Axxess Integrate AX-PO90052 retains the vehicle's stock M.O.S.T. 25 amplifier with balance control. Fader control is not supported.
  • R.A.P. (Retained Accessory Power): The AX-PO90052 retains the R.A.P. function in your vehicle. R.A.P. (Retained Accessory Power) supplies power to the radio after the ignition is shut off until one of the front doors are opened.
  • Warning Chimes: The AX-PO90052 will also retain factory warning chimes when present in your vehicle.
  • Steering Wheel Audio Controls: If your aftermarket head unit is steering wheel control ready, the included ASWC-1 steering wheel control interface module and harness allow you to retain your vehicle's factory steering wheel audio controls.

Outputs: The Axxess Integrate AX-PO90052 provides a 12V/10A accessory output, illumination output, and navigation outputs to make installation easier and less time consuming.

  • Accessory (12V/10A): Because there is no 12-volt accessory wire in the factory harness of your vehicle, the AX-PO90052 provides a 12-volt, 10-amp switched accessory output. This prevents you from having to run an accessory wire to the fuse box or underneath the steering column when installing your aftermarket stereo.
  • Illumination Output: The AX-PO90052 also has an illumination output if your new aftermarket head unit has an illumination wire.
  • Navigation: The AX-PO90052 provides essential wires required for aftermarket radios that have navigation. VSS (Vehicle Speed Sense), Reverse, and Parking Brake wires are provided. This helps to cut down the installation time, since the installer does not have to look for or tap into these wires in the vehicle.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
It was the only set of it's kind on the market. I trust Crutchfield to know their stuff. I have been missinformed by others before and it costed me a new head unit, when the where not as inexpensive. [ H  Sep 27, 2018 ]
A
Want to retain existing Bose amp / sub so need a MOST adapter. [ Julian  Sep 09, 2018 ]

3 questions already asked

Q
The Bose amplifier takes a digital optical signal, correct? So it presumably has its own DAC. The converter box included in this kit must output a digital optical signal, but does it end up taking an analog input from the head unit or a digital signal? An analog signal would mean a Digital->Analog->Digital->Analog conversion before reaching the amplifier and speakers.
[ Matthias  Jan 04, 2019 ]
2 answers
A
Not sure what a DAC is ir the rest of yoir concerns but i installed the kit alongwith a new head unit leaving everyting else stock in my sons 05 Boxster S and it works well
[ Aaron  Jan 13, 2019 ]
A
I'm not sure where you're getting that first Digital, but I'm not sure it matters, I think you're right, but it works fine. I don't think the Porsche Bose system (amp & speakers) is good enough to really expose that double conversion. If you're planning to put in high end speakers with the existing Bose amp, I'd reconsider and put in your own amp to run the new speakers. In my case, perfectly satisfied with the Sony AX200 > Axxess > Bose performance, but it's admittedly not audiophile level.
[ TIMOTHY J  Jan 13, 2019 ]
Q
It seems that the upgrade to a GPS unit does not work properly with a Bose system on a 2006 Carrera? Was this issue fixed by Crutschfield?
[ C911ERA  Dec 26, 2018 ]
1 answer
A
Hi Philippe, That Axxess wiring harness would support the Bose system (amp, speakers, sub) in addition to steering wheel controls in most 2006 Porsche models. It will not retain the factory GPS or backup camera. You can get both of those things through aftermarket parts through. If you have any further questions or would like one of our Product Advisors to put together a personalized cart for you call or chat with us here: https://bit.ly/2QNxGQB --Cosmo
[ Cosmo  Jan 01, 2019 ]  Staff
Q
My Porsche Cayman doesn't have steering wheel control. How do I buy a smaller kit?
[ nhat  Nov 28, 2018 ]
2 answers
A
The AX-PO90052 includes steering wheel control however the AX-PO904 does not. I simply bought the AX-PO90052 and didn't install the SWC module.
[ Gregory  Nov 29, 2018 ]
A
I installed this on my sons Boxster S - u just dont use a couple of connections if u dont have ateering wheel contrils - we dint have the steering controls either - the kit worked very well and even tho it was a bit expensive it was best solution (we had bad head unit but dint want to replace stock bose amp speaks sub etc)
[ Aaron  Nov 28, 2018 ]

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