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iSimple IS31 Antenna Bypass FM Modulator for Factory or Aftermarket Car Radios

3.9 out of 5 stars 382 customer reviews
| 78 answered questions

Price: $26.46 & FREE Shipping on orders over $49. Details

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In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Standard Packaging
  • Universal aux audio input for all FM radios
  • Simply flip the switch
  • Enjoy the clear, clean audio, Car radio aux input has a sleek, compact design
  • Antenna bypass FM modulator, Play almost any portable device directly through your radio
  • Audio connections and docking cables sold separately
118 new from $19.35 6 used from $19.84
$26.46 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • iSimple IS31 Antenna Bypass FM Modulator for Factory or Aftermarket Car Radios
  • +
  • iSimple IS335 Dash Mountable Auxiliary Input Adapter
Total price: $38.83
Buy the selected items together

Product Description

Product Packaging: Standard Packaging

Antenna Bypass FM Modulator

Product Information

Product Packaging:Standard Packaging
Product Dimensions 7 x 1.9 x 5.6 inches
Item Weight 9.6 ounces
Shipping Weight 9.6 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
ASIN B002U5XPBE
Item model number IS31
Customer Reviews
3.9 out of 5 stars 382 customer reviews

3.9 out of 5 stars

Technical Specification

Warranty [pdf ]

Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF ]

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Package Type: Standard Packaging Verified Purchase
I've had this item installed in my wife's car for over a week now, and we're getting so much use out of it I've already ordered a second for my vehicle. That's how highly we think of it.

We both own GM vehicles (hers: 2007 Chevy Malibu Maxx, his: 2004 Chevy Trailblazer) and neither stock radio had an aux-in port for our Apple products (iPad, Nano, or iPod), our daughter's DVD player or PS3, or my Samsung Galaxy S II. We travel quite a bit by car, and we enjoy sharing the entertainment instead of having everyone put on earphones while the driver gets control of the radio by default. We had tried the cheaper FM transmitter, which had mixed results on the Trailblazer. All brands (and we tried 3 different ones) were all a miserable failure on the Malibu Maxx due to the fact that the antenna is located at the rear of the vehicle. Since FM transmitters have a short transmission radius, the antenna was always too far away to be effective. We also tried the Dynex cassette adapter with the Trailblazer, but the audio was murky and muffled.

We don't like removing perfectly good stock radios from our vehicles, so after researching other alternatives on how to integrate our various audio devices, I decided to give the modulator a try. I'm a fairly handy guy, and while I had never gotten too involved with any of my vehicles' wiring in the past, this seemed like a relatively straightforward task. I was pretty accurate. The installation took about 2 hours total on the Malibu, and I'm sure it will go faster with the Trailblazer now that I'm familiar with it.

A few things you need to know:
1) Know how to remove the trim from your vehicle to successfully remove/access your radio. I did a Google search and found the exact walk-through I needed.
Read more ›
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Package Type: Standard Packaging Verified Purchase
I bought a brand new Suzuki Kizashi and much to my dismay it does not contain an auxiliary input. WHY!? My initial solution was to buy an FM transmitter at Best Buy. After about 5 minutes of usage I knew I'd need a better solution. It reduced the volume by about 30% and constantly had some level of static.

My first FM modulator was the Scosche FMMOD01. I hooked it up and there was constant static at all volumes. I tried two different 12v sources and two different ground locations but the static wouldn't go away. Maybe I got a bad one. But I decided to try something different.

Today my iSimple IS31 came in the mail and I just installed it a short while ago. Now THIS is what I was looking for! I hooked it up to the same power/ground locations as before and am receiving all but zero static. There is a small amount detectable when you have the volume cranked with the MP3 player off. But that is beyond negligible. The volume gets nice and loud and there is no loss in sound quality.

One thing I did which I think makes things a little easier. There are two 12v sources in the wiring harness for the radio, a constant and a switched. The switched only delivers power when the key is turned over. So I hooked up the 12v wire to the switched wire and eliminated the on/off switch that comes with the iSimple (just cut the plug and solder the two wires together)
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Package Type: Standard Packaging Verified Purchase
Works awsome! Got it for my 2003 chevy suburban. Easy to install and im not a mechanic by any means. I also bought the antenna adapter for GM and the IS335 dash mountable aux port. (You must buy these 2 extra items, its not included in the IS31 and it snaps rite into the connector on the IS31) Looks like a proffesional install in my truck. Sounds very good with stock Bose speakers in my truck. I will be buying one for my wifes car soon! With all 3 items it was not even $50. Well worth the money and cheeper than buying a new car stereo!
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Package Type: Standard Packaging Verified Purchase
First off, I've driven vehicles with AUX ports for years. If it didn't have an auxiliary input it had an iPod/iPhone connection.
Recently I acquired a 2003 Ford Explorer Eddie Bauer. I actually liked the truck so much I stopped driving my Regal GS as much!
This truck was fully - fully loaded, however it didn't have one thing i sorely missed. The aux jack! After trying cheap FM transmitters and always being extremely unhappy with them I randomly came and found the iSimple IS31. After waiting anxiously for about a week for delivery as soon as it showed up, I started the install. (I also bought a Belkin Audio Y Cable Splitter 1-Mini Plug, 2-RCA Plugs [Belkin Audio Y Cable Splitter 1-Mini Plug, 2-RCA Plugs (6 feet)]
The install was painfully simple and I did not need an antenna adapter for my vehicle. I ran the switch directly under the the radio / climate control cluster. I hid the unit inside with the radio near the lower space. I ran out the audio cable from underneath and tucked it within the center console. The power and ground were ran over to my inside fuse panel where I found an adequate ground, and power. I plugged in my iPhone, turned on the iSimple and clicked over the set radio station. I couldn't believe how great it sounded. I had to adjust the gain a bit, but that was also extremely painless. I couldn't recommend this product more. It's solved my biggest gripe with my truck and I will continue to use it everyday!!
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