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Axial LED Third Brake Light - Smoked (99-04 All, Excluding Cobra)

Item 398336
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      Review & Installation Video

      Hey guys. Today we're gonna be taking a look at and installing the Axial Smoked LED Third Brake Light for 1999 to 2004 Mustangs except for the Cobra.This is a smoked LED third brake light. So not only are you getting a smoked third brake light for a dark appearance but you're also upgrading to LED lighting. There are 12 LEDs in this third brake light. They're gonna be stronger, brighter, and last longer than your factory bulbs will. This is a direct plug-and-play replacement. So it's very easy to install. I'll call it a one out of three wrenches on the difficulty meter. It cost about 40 bucks, and we'll go ahead and show you how to get it on your car now. For this install, we used a 3/8 drive impact gun, a deep 10 millimeter socket, and a short extension. All right, guys, to start the install you're gonna pop your trunk. Your third brake light obviously is right here. So if you pop the trunk, there are going to be two 10 millimeter nuts that are holding this light in place. We're gonna go ahead grab a deep 10 millimeter socket and undo those. And now we're gonna disconnect our electrical connection. From here, we'll be able to remove the taillight. So before we move the third brake light, we do need to remove the bulbs in the sockets from the third brake light. So, you'll just need to rotate these and then they'll come right out. Obviously, I'm just turning them to the left a little bit and then the socket and the bulb will pop right out. All right. And now we can pull the third brake light. All right. So we can pull our trunk down a little bit. We're just gonna push on the back of the third brake light and it'll come right out. All right, guys, so here we have our factory third brake light on the table compared to the axial third brake light. You can see, there is a pretty big difference in the appearance. First of all, the axial brake light has a smoked lens on it. So you get that dark look from this. You're also upgrading to LED lighting here with this. So you have 12 LEDs throughout this entire third brake light. They're gonna be brighter and stronger and last longer than the bulbs in your factory third brake light. They're rated for up to 100,000 hours of continuous use. So the other cool thing about this third brake light is that is completely plug and play. So if we spin it around here, you can see your LED bulbs are already in here. All you have to do is unplug the bulbs from your factory harness, plug them in right here, and then plug your overall harness back in. Bolt this thing down and you'll be good to go. So, before we get this installed in the car, we're gonna grab our factory harness and remove those stock bulbs. So all you have to do is pull each bulb out of the socket. So I'm just gonna grab them and they'll out easily. And now we can move to the car. All right. So at this point, we are going to set our third brake light in place and then we're actually gonna plug in our harness after the third brake light is in place. All right. We're gonna get the third brake light installed in the trunk. All right. So we're actually gonna get our 10 millimeter nuts in place right now too. These don't need to be too tight, but I will tighten them a little bit. All right. And from here, we can grab our harness. All right, guys, so now we're gonna go ahead and just plug in our LEDs into our socket. The way to do this is you're gonna wanna wiggle back and forth and then they'll plug right in. One thing to keep in mind though is that before we finish up our install, we will need to test to make sure that we have the polarity of these correct, meaning these can plug in this way or we can actually flip them 180 degrees and they can plug in this way. Your LED lights will only work one way though and there's no way to tell unless you just plug them in and test it. So once again, I'm just wiggling these back and forth to get them plugged in. If it doesn't feel like it wants to plug in, I'll rotate them 180 degrees and try to plug in the other way.There are four sockets that we're plugging into. The fifth socket is gonna keep the stock bulb because that's actually gonna be our trunk light. All right. So now we're gonna take our factory bulb. Get this up into place for our trunk light. We'll plug our factory harness back in and we'll go ahead and test the lights real quick just to make sure they're all working. So we just tested our third brake light, and luckily, we got all of the polarity correct. Once again, I'll remind you, make sure you test your third brake light. And if any of your LEDs aren't lighting up, all you have to do is disconnect from the socket, rotate 180 degrees, and then plug back in and it should work for you. That's gonna wrap up this review and install. Keep in mind that you guys can always check out this third brake light more online right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • LED Third Brake Light Upgrade
      • Brighter than OEM for Additional Safety
      • Modern Electronics with Super Bright LED Technology
      • Smoked Lens with Black Housing
      • Simple Plug and Play Installation
      • Fits 1999-2004 Mustang Models, Excludes 2003-2004 SVT Cobras


      LED Third Brake Light Upgrade. Installing Axial's Smoked LED Third Brake Light is a great way to upgrade the appearance and safety of your 1999-2004 Mustang. This Axial Brake Light replaces your New Edge Mustang's weak incandescent stock third brake light bulbs with 12 super bright LEDs. These LEDs will vastly improve your visibility to catch the attention of distracted drivers.

      Quality Construction. Manufactured from OEM grade materials, this Axial LED Third Brake Light is assembled to precise standards for long lasting quality. Featuring a durable black plastic housing with a smoked red lens, this Light employees a single row of 12 LEDs. These super bright LEDs have an average life span of 100,000-hours, to last years longer than any conventional incandescent bulbs.

      Simple Plug and Play Installation. Axial designed their LED Third Brake Light to be a direct plug and play replacement for your Mustang's original factory housing. There is no cutting or modifications required for a clean straight forward install. Installation can be completed in about 15 minutes with just basic hand tools.

      Application. This Axial Smoked LED Third Brake Light is specifically designed for use on 1999-2004 Mustangs, excluding the 2003-2004 SVT Cobra models.


      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# 398336

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 100+ customers

      Installation Time: Less than 1 Hour

      • February 15, 2020

        5 2004 V6 - NoahIsawesome14 Installation Time: Less than 1 Hour

        Looks good

        Kind of difficult to get the light bulbs out bust after that it was easy. It cam3 with simple instructions.

        Helpful (0)
      • January 31, 2020

        5 2002 V6 - Jreichert3 Installation Time: Less than 1 Hour

        Looks great

        It was so easy to install. Watched the video on you tube. Only took about 15 min and got the lights on the 1st try no reverse polarity mix up. Looks great.

        Helpful (0)
      • January 26, 2020

        5 2003 Mach 1 - Vic Installation Time: Less than 1 Hour

        Nice upgrade

        Easy install, easy to follow instructions, excellent fit and finish.

        Helpful (0)
      • January 22, 2020

        3 2004 V6 - Caballo2004

        Easy to install

        Easy to install but one of my light are dim so im gonna will wait till spring and either fix it or request another one. I dont think its AM s Fault so things just have flaws.

        Helpful (0)
      • January 21, 2020

        5 1999 GT - Boomie Installation Time: Less than 1 Hour

        99 GT

        Fits perfectly and looks great definitely a good upgrade

        Helpful (0)
      • January 21, 2020

        5 1999 GT - Kalypso Installation Time: Less than 1 Hour

        Axial LED Third Brake Light

        easy install.. nice and bright.. compliments other leds

        Helpful (0)
      • January 12, 2020

        5 1999 V6 - Fidtexas Installation Time: Less than 1 Hour

        Great product

        Bought one from eBay was built the same this one is better. Easy to put in.

        Helpful (0)
      • January 04, 2020

        5 2004 GT - IvanF Installation Time: Less than 1 Hour

        Axial Third Brake Light

        Love this light, gave the stang a new and improve look. The little things stands out a lot. easy install and great value.

        Helpful (0)
      • January 03, 2020

        4 2001 GT - Mannard Installation Time: Less than 1 Hour

        Nice LED 3rd Brake Light

        getting the LED connectors in the existing plugs is a bit tricky, but shouldnt take you more than 30-40 mins

        Helpful (0)
      • December 16, 2019

        5 1999 GT - JSL Installation Time: Less than 1 Hour

        excellent part

        getting the old one out was the biggest hassle due to age and wear.

        Helpful (0)

      Questions & Answers (12 answers)

      5 Top Rated Questions

      I did not see this question asked, but I am curious what is the difference between this and the Raxiom?? Other than 30 dollars? To me they both appear identical both are led and both are smoked. The description itself is basically the same, so I would like some clarity. Thanks

      • While they are both similar in design, this third brake light, item number 398336, is not DOT compliant, whereas the Raxiom third brake light, item number 49136, is DOT approved under Compliant #QR1300241.

      Helpful (6)

      Has there been any reports of lights staying on all the time due to the low voltage of LED bulbs?

      • Very sorry to hear of your issue. It is possible the resistors in the item are defective. Please contact customer service at 1-877-887-1105 between the hours of 830 am and 11 pm Eastern time to arrange a replacement. 

      Helpful (4)

      Do I need new bulbs?

      • This third brake light kit will replace the factory bulbs with LEDs.

      Helpful (1)

      this product isn't appearing like a plug and play. I have a 03 gt coupe and when I try to use factory harness and plug in the ends from the axial led brake light, they don't seem to fit or go into the factory plug. Afraid that they will hurt my connectors and then I have to buy another 3rd brake light. Any clues or ideas are appreciated.

      • You will need to simply connect each of the LED light sockets into the factory sockets. For further review of the install process please check out this great guide here:

      Helpful (1)

      can this be connected to remain on at all times other than just braking?

      • This would function just like the OEM brake light and would only light up when braking.

      Helpful (0)
      Post Your Question
      7 More Questions
      Is there any way to connect third brake to remain on all the time and when braking lights get brighter but light does not go to dark. 1 answer
      So I installed this product, and my brake lights stopped working, and this product does not light up. I have tried repositioning the plugs at 180 degrees like it says, looking at my fuses, and replacing the brake light switch. But it keeps blowing fuses. Is it possible that I have too many LED lights installed its overloading? 1 answer
      It states that it's not for the Cobra but I've seen several comments saying they installed them on their Cobra. I have a 99 Cobra, will it fit w/o modifying the wiring? 1 answer
      What makes Raxiom's third brake light DOT compliant when Axial looks the same. 1 answer
      Is this light compatable with the raxiom 3x flasher 1 answer
      Does this 3rd brake light come with a gasket? 1 answer
      i bought this third break light and im trying to install it, do i need a conversion or something for the LEDs i have the straight bulbs, just wondering if i needed to buy another part it says direct plug and play. Thank you 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) LED Third Brake Light

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 99, 00, 01
      • GT - 99, 00, 01, 02, 03, 04
      • Mach 1 - 03, 04
      • V6 - 99, 00, 01, 02, 03, 04

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