2019 Subaru WRX Support and Subaru Accesstuner Updates

2019 WRX Blog Cover2

Our Subaru team is excited to announce two major updates!  Full tuning support, including Stage Power Packages and Off The Shelf Maps, is now available for the USDM 2019 Subaru WRX (6MT Only).  Subaru Accesstuner software has also received updates and new tables/monitors for select vehicles.  USDM 2019 STI and WRX CVT owners, don’t fret.  We will be rolling out support for those vehicles very shortly!

2019 WRX

Subaru’s newest WRX is now fully supported within the COBB product line.  We have confirmed fitment of our bolt-on upgrades such as the Big SF Intake System, 3″ Turboback Exhaust (both Resonated and Non-Resonated), and Air/Oil Separator.  The SUB-004 Accessport comes loaded with Off The Shelf Maps to support all of our common bolt-on upgrades.  For those interested in taking their 2019 WRX beyond the scope of our Stage Power Packages and Off The Shelf Maps, Subaru Accesstuner and Accesstuner Pro both now offer full tuning support, including COBB Custom Features.  Learn more about our support for modified Subaru WRXs.

For a complete list of compatible parts, visit the 2019 Subaru WRX MT USDM Vehicle Page on the COBB Tuning website!

Subaru Accessport V3 (AP3-SUB-004)

accessport_v3_subaru The Accessport is the world’s best selling, most flexible, and easiest to use ECU upgrade solution for your Subaru. Unlock power hidden within the vehicle by replacing conservative factory settings with more aggressive calibrations. Follow our staged upgrade path with pre-loaded Off The Shelf (OTS) maps or use custom mapping for any modification level. It’s the last engine management solution you’ll ever need.

Subaru Accessport V3 (AP3-SUB-004)

Off The Shelf Maps


Each Accessport comes pre-loaded with an assortment of Off The Shelf Maps that support from a completely stock car up to a car with a full turboback exhaust and COBB Big SF Intake System.  Map files are available for cars using either 91 or 93 octane fuel.  Stage 1 and Stage 1+BigSF map produces peak gains of +8.5% HP / +8.5% TQ over stock and maximum gains of +10% HP / +15%TQ over stock when using 93 octane fuel.

*For a complete explanation of each Off The Shelf Map for your 2019 WRX, visit the Map Notes Page.

Performance Maps
  • Stage 1
  • Stage 1+BigSF
  • Stage 2
  • Stage 2+BigSF
Non-Performance Maps
  • Anti-Theft Mode
  • Economy Mode
  • Valet Mode

2019 Subaru WRX Stage Power Packages

COBB Stage Power Packages take the guesswork out of upgrading your 2019 WRX.  We have combined our precision engineered bolt-on parts with the Accessport and professionally calibrated Off The Shelf Maps to create a completely turn-key package.  Keep it mild with a Stage 1+Big SF Package or maximize airflow with the COBB Stage 2+Big SF Package!

SUB0040W1P_main 641XR2_main SUB004NW2P_main

*Visit the 2019 WRX MT USDM Vehicle Page for a complete list of compatible products.

Accesstuner / Accesstuner Pro

Interested in modifying your 2019 WRX beyond the scope of our Stage Power Packages?  Subaru Accesstuner and Accesstuner Pro HL software packages both now offer full custom tuning support for the USDM 2019 Subaru WRX 6MT.  Take your car to the next level by adding a COBB Flex Fuel Sensor Kit or Front Mount Intercooler (or both!) and contacting a Subaru Protuner for a custom tune.



Subaru Accesstuner Updates

The release of Accesstuner 2.0 brings a host of workflow changes and new features, along with an assortment of new tables for the USDM 2002-2005 WRX.  It should be noted that the updated version of Accesstuner is no longer compatible with Windows XP or Windows Vista.  The Accesstuner software will no longer work if updated in these operating systems.  Users with these operating systems should avoid the update or install the software on a supported Windows system (Windows 7 or higher).

New Vehicle Support

The 2019 USDM WRX MT CCF ECU type has been added to Subaru Accesstuner allowing for total control of the factory ECU.

Custom Table and Stock Calibration Table Change Alert

This prompt will notify users of changes to the stock calibration file or addition of custom tables when a map saved in a previous version of software is opened in Accesstuner 2.0.


When the check-box for “Show Only Affected Tables” is selected, the new custom tables or tables with differing stock data will be presented.


User Definable Hot Keys

User definable hot keys are now available.  There is also the choice of different presets including

  • “Accesstuner 2004-2016” scheme is the default for existing Accesstuner Users.
  • “Accesstuner 2017” scheme is the default for new Accesstuner users.

See Edit → Configure Options → Keyboard for details.


Map Comparison and Import Comparison Differences

Comparison categories have been added to help tuners compare and update definition files with drastic table differences.  These different categories include

  • Tables found in both Active and Comparison, but cannot be compared
  • Tables found in Active but not in Comparison
  • Toggles found in Active but not in Comparison
  • Toggles found  in Comparison but not in Active
  • DTCs found in Active but not in COmparison
  • DTCs found in COmparison but not in Active
2002-2005 Subaru WRX New Tables

Adds the ability to tune the manifold wall-wetting compensations for the 02-05 WRX which is similar in operation to other port-injected ECUs. Wall wetting compensation corrects fueling for the effects of fuel puddling on the manifold walls and back of intake valves (and subsequent evaporation from these surfaces) during transient throttle/load conditions.  Please see the Tech Bulletin linked below for a complete understanding of these tables.

Tech Bulletin – 02-05 WRX (SD ECU Type) – Wall Wetting Calibration Improvement


2018-08-14 11_01_01-Options

Fuel Pressure DTC Ceiling Tables

Adds the ability to tune fuel pressure “ceiling” thresholds related to P0088 that may be activated when higher fuel pressures are targeted.


Additional Idle Speed Targets Table for DIT WRX/FXT


Revised Closed Loop Fuel Target Lean Limit Tables and Monitor

Closed Loop Fueling Target Base (Main) Lean Limit” table names, conversions, and descriptions updated to reflect additional ECU logic that can come into play when these tables are modified. This can potentially cause a leaner than expected final fueling target (“Commanded Fuel Final”) and higher positive fuel trims.  The corresponding monitor name has also been updated in software (“Closed Loop Fuel Target Base Lean Limit and CFF Transfer (Table)”) with new conversion to match table conversion updates.  Please see the Tech Bulletin linked below for a complete understanding of these changes.

Tech Bulletin – DIT Subaru – Fuel “Lean Limit” tables causing unexpected fueling behavior



13 responses to “2019 Subaru WRX Support and Subaru Accesstuner Updates”

    • Hi David,

      Expanded AccessTuner support for ADM vehicles is in the works currently. I don’t have a specific ETA but the goal is sometime in the first quarter of 2019.

      • Is support for 2018 Subaru WRX 6MT ADM still being added to AccessTuner sometime this quarter? I’ve patiently waited for five months now and there are less than 3 weeks of the 2019 first quarter left.

        • Hey David,

          Thank you for your patience, I apologize for the long wait. We do still fully intend to add ADM vehicles to our end-user Accesstuner offering. We had some higher priority Subaru projects take a bit longer than anticipated however this one is nearing the top of our list. While it may not make it out the door before the end of the quarter, it will not be far off.


          • When are we looking to finally have the AccessTuner support for ADM vehicles?

  1. Hi Marshall, I got excited when I saw your prior post (10jun2019), but the link you provide shows NO ADM Subaru vehicles at all. It looks like there is only USDM support for AccessTuner 🙁
    How much longer will we have to wait please?

    • Hey David, sorry for the confusion – we simply need to update the webpage to reflect the new ADM vehicle support. If you click on the blue “Get Accesstuner” button, you’ll be lead to a pop-up that will allow you to select a supported ADM vehicle type.


  2. Hi Marshall. That’s great, thanks. The EFI University page knows me as I completed course #12026 30June 2018. However, I never received the Acccesstuner software and investigations revealed my car was unsupported, and I should not have been allowed to complete the course! I was refunded the EFI amount. The EFI page now says #12026 is still processing, so I haven’t signed up to do the course again. Do I have to?
    Thanks for your help.

    • Hey David,

      If you’ve already taken the course, you do not need to take it again. I should be able to confirm all of that in our systems and manually trigger an email with an Accesstuner installer.


  3. Hi Marshall, Thanks so much for sorting this out for me. I have the Accesstuner software now and can start “playing”. I really appreciate the trouble you took to look into this and sort it out properly. All the best.

    • Hey Omar,

      The Stage 2 map file is counting on increased airflow from an upgraded J-Pipe. Without that increased airflow, the motor/turbo would be fighting to produce increased load and heat would become an issue pretty quick. The car would also not accurately control boost without removing a boost pill as is instructed in our Map Notes document. This is definitely not something we would recommend.


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