Med91 Multimap Info

MED9.1 Multimap (Map Switching) allows VAG 2.0 TFSI (EA113) owners to store and switch between multiple tuning profiles, such as valet, eco, and race modes, directly via factory controls. The software patch, which often supports advanced features like launch control and no-lift shift, is implemented through specialized tools or automated services, typically requiring Bosch software version A4.8.6 or higher. For more details on the technical implementation, visit GitHub .

Unleashing the VAG 2.0TFSI: The Ultimate Guide to MED9.1 Multimapping

MED9.1 Multimap: Unlocking Advanced ECU Tuning for VAG 2.0TFSI Engines

: Users can set up to 4 different tunes, such as: Anti-theft (no start/immobilized). Full Power (performance tune). Low Power (valet mode or fuel economy). Performance with Extras (e.g., pops and bangs/crackle map). Key Requirements & Compatibility med91 multimap

An aftermarket tuner can exploit this by creating two complete sets of performance maps. They populate the "0_A" tables with one performance calibration and the "1_A" tables with another. Then, by dynamically changing the value of vkKraQu , they can instantly switch the ECU between the two complete map sets.

Unlike a single static tune, multimap technology utilizes the "free space" (roughly 30-40%) in the factory ECU's flash memory to store additional code and map complexes. This allows the ECU to toggle between different sets of parameters for: Revlimit ECU Tuning Boost Pressure

For time-sensitive operations—wildfire tracking, ambulance routing, or military logistics—the Med91 Multimap supports dynamic, real-time data feeds. These can be ingested via WebSockets or MQTT (Message Queuing Telemetry Transport) protocols, displaying moving assets (vehicles, personnel) directly over static base maps. Unleashing the VAG 2

Used to disassemble the binary and find the loop where the multimap code can be inserted.

This is not a standard "Stage 1" file. It requires custom definition files (OLS or XDF) created by specialized calibration engineers.

Modern MED9.1 multimap solutions typically utilize a variable within the ECU code known as ( Variantenkriterium für Kraftstoffqualität ), which was originally intended to handle different fuel qualities. By patching the ECU firmware, tuners can hijack this variable to point the ECU toward different tables for boost, ignition, and fueling based on user input. Common Switching Methods Performance with Extras (e

Locate the necessary memory addresses (variables) within your file using a disassembler like IDA Pro or Ghidra. Execution:

The MED91 multimap is the ultimate software solution for VAG enthusiasts seeking versatility. By providing the ability to switch between tailored maps on the fly, it offers a "best of all worlds" scenario—efficiency, safety, and raw performance, all managed within the sophisticated Bosch MED9 system.

: Optimized for specific octanes (e.g., 95 vs. 98/100 octane). Fueling & Trims