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The COBB Tuning Accessport V3 AP3-SUB-001 is the go-to ECU tuning platform for early GD-chassis Subaru WRX enthusiasts. Instead of the restrictive factory tune, this handheld device flashes optimized engine maps directly to your ECU, bumping up horsepower, torque, and throttle response right out of the box. Beyond basic tuning, the Accessport V3 doubles as an in-cabin monitor, giving you real-time engine data, customizable multi-gauge layouts, performance tracking tools, and a built-in check engine light scanner on a crisp, high-resolution color screen.
Setup takes just a few minutes through your car's OBD-II port, with straightforward on-screen prompts guiding you through the initial flash. The AP3-SUB-001 can store up to 100 maps, so you can easily swap between pre-loaded Off-The-Shelf (OTS) tunes or custom maps as you bolt on new mods. It also packs built-in data logging features to record engine behavior, plus performance tools to measure your 0–60 and quarter-mile times. Best of all, this unit is 50-state emissions legal under CARB Executive Order approval when used on the supported vehicles listed in COBB’s application guide.
Note: Built specifically for U.S. Domestic Market (USDM) vehicles. Double-check your exact model year, market region, and engine setup before ordering.
Important ECU Compatibility Note: If your 2002-2005 WRX has had its original factory ECU replaced, please note that the Accessport does NOT support the newest Subaru replacement part numbers listed below:
It overwrites your Subaru's restrictive stock computer settings with optimized fueling, timing, and boost maps from COBB. This cleans up flat spots in your powerband, sharpens throttle response, and adds power. It also stays plugged in to act as a digital gauge cluster and diagnostic tool.
No. The AP3-SUB-001 is built strictly for 2002–2005 USDM Subaru WRX models running the 2.0L EJ205 turbo engine. It will not work on newer 2.5L models, STI models, or non-turbo Subarus.
Yes, easily. It plugs directly into the factory OBD-II port under your dashboard. The handheld device walks you through the entire installation process step by step.
No. As long as you use it on the supported vehicles outlined in COBB's application guide, it carries a CARB Executive Order, making it completely legal for street use in all 50 states.
No. The Accessport comes preloaded with Stage 1 maps designed specifically for completely stock cars. When you do start adding parts (like an intake or exhaust), you can flash Stage 2 maps or get a custom pro-tune.
Yes. The device reads standard diagnostic trouble codes (DTCs) and explains what they mean, allowing you to troubleshoot and clear check engine lights yourself.
It holds up to 100 maps, giving you plenty of room to store multiple fuel octanes, staging maps, valet modes, or custom dyno tunes.
Definitely. While the preloaded OTS tunes cover basic setups, your local or remote tuner can load custom maps onto this exact device to safely run bigger turbos, larger injectors, and advanced bolt-ons.
Yes. The built-in "Uninstaller" function completely wipes the COBB tune and flashes your exact original stock factory map back onto the ECU, leaving the car completely stock and ready for resale.
COBB Tuning includes a 12-month limited warranty for the original buyer against defects in materials and manufacturing when purchased brand new from an authorized dealer. Technical support and software updates remain free through COBB's website and Accessport Manager software long after the warranty period expires.
SKU:COBBAP3-SUB-001 ,UPC: ,Availability:
