COBB Accessport V3 Mustang EcoBoost 2015-2023

97% of 100


  • Multi-Gauge Display
  • Automatic Dimmer
  • Data Logging Capabilities
  • Easy-To-Use Interface

COBB Accessport V3 for 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, and 2023 EcoBoost Mustangs.

COBB's Accessport V3 is the best tuning option available for your 2015-2023 EcoBoost Mustang. This flexible ECU upgrade solution unlocks power hidden within the vehicle by replacing conservative factory settings with more aggressive calibrations. The Accessport V3 (P/N: AP3-FOR-003) can provide off-the-shelf calibrations for most bolt-on modifications and it should be the last engine management solution you will ever need. Along with all the new viewable upgrades from the V2, the V3 also has more speed, more memory, more map storage, more live gauges, and more troubleshooting help.

Choose from multiple gauge setups which include your choice of one gauge to six gauges. Scroll through tons of different display parameters to view the specific information important to you. Information can be displayed in metric or imperial units. A shift light can be set to the desired RPM and is plenty bright that a separate shift light isn't needed. Monitor all the parameters you want to view and customize each layout for the street, strip, or track.

COBB's Stage 1 93 Octane Calibration has seen a peak of 1.5% RwHp and 22.6% RwTq, but has shown is largest improvements of 22.9% RwHp and 25.6% RwTq throughout the power curve!

*Peak gains are measured as the difference between the highest points of the two plots. Max gains are measured as the largest gain at any single point between the two plots, results may vary.

Features and Benefits:
- Customizable Multi-Gauge Display
- Data Logging Capabilities
- Multiple Tuning Options Including Timing, Shift Light, Launch Control, and more!
- In-Vehicle Mount with On/Off Switch
- Large, Full Color, 1/1000 High-Resolution Screen
- Automatic Dimmer
- Easy-to-Use Interface
- Interchangeable Face Plates
- CARB Approved with EO# D-660-6
- Made in the USA

*CARB Approval is ONLY for 2015-2017 EcoBoost Mustangs. This product is NOT CARB approved when used on 2018-2023 models.

ATTENTION: The COBB Accessport fully supports the European (EDM), Australian (AUDM), South Korean (SKDM) and Chinese (CHDM) Domestic Market EcoBoost Mustangs.

*Note that there is a significant difference in capability between the 2023 High Performance Package and other EcoBoost Mustangs. Those vehicles have off the shelf maps with specific changes for their differences.

Measure 0-60 MPH time, 1/4 mile time or horsepower with a built-in dynamometer. An included trouble code reader allows you to diagnose problems on the fly without the need to stop at a garage. The most important aspect of the Accessport V3 is the ability to install different maps and quickly adjust tuning elements such as idle, timing, launch control and flat-foot shifting. Create your own custom maps for your Accessport V3 using Accesstuner Race. A complete OEM tuning table provides access to optimize your mapping for any set of modifications. Data logging is included so you can view engine vitals which can alert you to any changes that need to be made to your tune. If self-tuning isn't your thing, visit a local tuner in the COBB Professional Tuning Network to have a custom tune created and loaded onto your Accessport V3. You don't even need to physically visit a tuner if you don't want to. Use easy data logging and map loading on your Accessport V3 to have an e-tuning expert remotely custom tune your vehicle.

Tech Tip: Several COBB Custom Features (CCF) are now user adjustable through the Accessport for the EcoBoost mustang. These adjustments include changing map slots, turning custom traction control on/off and adjusting the amount of slip the custom traction control enables. Also, automatic vehicles can now take advantage of new features that include a bump box, burnout mode, transbrake and 2-step. These adjustments can be found under “Tune” -> “Adjustments” -> then select which new feature you’d like to adjust. It’s important to note that the CCF Accessport Adjustment are dependent on the calibration file being used. For example, the Traction Control feature must be enabled via a custom tune (Custom Tune is NOT Included).

*To ensure your COBB Accessport has all of the available features listed, please make sure to check for the latest firmware release.

Installation is extremely simple, fast and straight forward with easy-to-understand directions to guide you through setup. Initial setup matches the Accessport V3 to your vehicle modifications. The on/off switch allows you to turn off the programmer so the battery doesn't die. An automatic dimmer brightens and dims the screen depending on day or night.

Please Note: Use can use your PC or Mac based computer to manage maps, download recorded datalogs or quickly update your Accessport. To ensure your new Accessport V3 is up to date, please click HERE to download the latest version of COBB’s Accessport Manager for free.

California Residents: Proposition 65 Warning

This item is 50-state legal (CARB E.O. Number D-660-6 (2015-2017))

Installation Difficulty


Novice skill is required for this installation.

Installation Videos

Video Transcript

One tried and true way to add horsepower and torque to any vehicle is with a good performance tune. Whether you're talking about a high-performance car like our EcoBoost Mustang or even a utility vehicle like an F150, a good quality tune is going to add horsepower and torque, especially if you don't mind upping the octane a little bit. We had great success with the COBB Accessport on our focus ST project car, so today we're going to install one on our EcoBoost Mustang.

The COBB Accessport is an excellent tool for your 2015 EcoBoost Mustang. It comes with pre-loaded maps to work for a variety of performance modifications, as well as different octane, and has the ability to be custom tuned, as well. On top of that, it can read and clear any kind of trouble codes, has performance parameters built into it, and can also do real-time data logging right on the screen. The kit includes the Accessport itself, a handy carrying case, two different face plates, a mount for your dashboard, and a cable to connect your OBD-II port.

We'll start by plugging the cable into our OBD-II port. We're basically going to follow the headlights switch down under the dash, and it's right now here. Once the cable's plugged in, plug in the other end to the access port, and it'll turn on automatically.

Once it turns on, it gives you the basic instructions on how the buttons work. Basically, you've got up, down. The small button's "cancel". Large button in the middle is your "OK". Until you marry the Accessport to your vehicle by programming it, you're only going to have two options on the main screen. One's going to be to install your tune which is basically to install the Accessport. The other one is for trouble shooting. Even if this one isn't married to your vehicle, you can still use it for any OBD-II car to plug in, check a check-engine light, and clear it, as well.

We're going to install the Accessport. Do to that, the first thing you want to do is hit the "start" button once. You don't want the car to start, but you want it to turn on. You want the dash to light up. You'll know you're doing it right. Now, we'll click on "install". Next on the screen, it's going to tell you what kind of vehicle it thinks it's plugged into. In our case, U.S. domestic market, 2015 Mustang EcoBoost, male transmission is correct. We'll hit "continue".

Once it recognizes the car, it's going to give you a couple of different options for your tune. Anti-theft mode, basically what that does is it disables the car. For our friends in the military or someone who stores their car for a great period of time, you can load this tune in, and even if you have the key, it will not start the car. Down at the bottom, you have a valet mode. You load the valet mode tune. Basically, it limits the car to about 35 miles an hour and 3,000 rpm, so nobody can take it out and beat on it.

Besides that, then you have your normal performance tunes. Stage 0, basically, just marries the tuner to the car. There really are no performance benefits for that, so we're going to skip that one. The two currently available are going to be Stage 1. Once there are some more modifications for the EcoBoost Mustang, such as downpipes, cold air intakes, inter-coolers, they'll be other stages available. What's on the market right now, probably is offered is Stage 1.

Here you can choose between your 91, if you're West Coast you can't get the 93 octane, or 93 which, in our case, is what we're going to go with. The Stage 1 will work with our stock EcoBoost. You're going to click "select". It recommends a battery charger. This does take a lot of time. Your first program is probably going to take roughly about 20, 25 minutes, so not a bad idea to put a battery charger on it to make sure you don't lose current because if the battery would die during the tune, you could lock the car up.

"Continue". Now, the Accessport is basically making sure that the computer is correct for the tune it wants to load. What it's doing here is basically preparing the computer. What it does, it takes the stock file, removes it, and stores it on the Accessport, and then re-flashes it with a performance tune. Again, this part here will take some time.

Right now, it's saving the factory data. This will take a good 10 to 15 minutes. Once it downloads the factory tune into the Accessport, the car's going to light up. All your sensors are going to go off. This is perfectly normal. Now it's preparing the ECU for the Accessport map. Once everything's downloaded and prepared, now it's actually flashing the computer. You notice it turns the "Do not turn off". Be very careful. If your battery would die here or you turn it off, you can definitely screw up your car. This is the actual part where the map is being loaded into your factory computer.

Okay. Now, once it gets to 100%, it'll say that it's resetting, making sure everything works. All your system is going to turn on, turn off, and your installation is successful. Hit the "off" key and you're programmed.

Now that the Accessport is married to our car, you'll see that we have a lot more options. We have gauges. We have performance along with the trouble shooting, and then the tune at the bottom there. Gauges allow you to monitor what's going on. It gives you additional gauges the factory doesn't provide, as well as data login. Here you can actually choose the layout. You can have up to six gauges on the screen, or you can have a couple larger ones. We'll go right in the middle. We'll go with three.

Took the top to "setup". As you're data logging, it actually has a shift light built into it, as well. We'll change the units. Change monitor allows you to choose what you're actually logging, or what you're seeing on the gauge. You can see you've got a ton of options on here. Pressure sensors, AFR, we'll click that for one of them. Click down to the next one. We'll set that up next. Change monitor. That one we'll go with "boost". We'll set up the bottom one here. We'll go with "coolant temperature".

Now that you got the car running, you can see we're not logging everything, but you're getting real time gauges on the car. You can set up a total of six or as few as one. You see our AFR changes. Our boost pressure changes. Great additional tool that comes in every Accessport once it's married to your car.

Then, in addition to the gauges you have performance parameters, something you can play with when you're at the track. Definitely don't want to do it on a public highway. It allows you to record your 0 to 60, as well as a quarter mile.

Like we said before, the Accessport is a great tool to have for your 2015 Mustang. You have the ability to load the pre-loaded maps. Custom tunes available. You also get the gauges, the performance parameters, and even an OBD-II scan tool built in. If you have an EcoBoost Mustang, this is a great choice for tuning.

Vehicle Fitment

This product will fit the following Mustang years:

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