BMW S54B30 with MSS54 and MSS54HP Performance ECU tuning software for BMW E46 M3. 

E46 M3 Performance ECU Tuning Features:

• Improved throttle response, can be requested to leave stock pedal sensitivity.
• Improved wide open throttle and part throttle horsepower and torque
• Gains 10-25WHP 10-25WTQ, depending on vehicle condition and wear.
• Rev limiter raised 300rpm, can be set to another requested spec.
• Speed Limiter Disabled
• Optional Sport Button Memory
• Optional Shift Lights via Oil Temp LEDs for Manual Transmission cars. 
• Premium Gasoline required for maximum performance
• Dyno RPM limiter is disabled, so you can rev to redline in case of ABS failure or if dyno testing the vehicle. No need to pull fuses, or use scan tool to enable dyno mode.
• EWS Delete is optional and can be combined with a tune for a discount.

Please Note:

• We do not offer tuning for emission delete, we do not disable catalytic converter or secondary air pump systems. 
• We do not offer tuning services to the state of California.

We have 2 methods of having the E46 M3 S54 Tune installed (Flash Type Selection).

 - BMW E46 M3 S54 Bench Flash Tune: 

Remove the DDE/ECU and mail it in. We will create a full backup image of your ECU without opening the lid or any physical damage to the ECU at all. We then upload our tune and mail the DDE/ECU back. This is the safest way, as we can have a full backup of the entire ECU content.

 - BMW E46 M3 S54 Remote Flash Tune - Recommended: 

No downtime!!! With this option, once an order is placed, we will ship you a cable. You will then be able to connect the cable to your OBD2 port and laptop, and read/write your own DME/ECU on your own. Best of all it's most convenient for you to flash it anytime.

We will send you our new flasher software to download with instruction. With this flasher tool you can Read and Write our tuning files by yourself, and also be able to read/clear fault codes and adaptations. 

*You will need a Windows 8 or newer laptop and WIFI to flash remotely (Apple, Chromebooks are not supported)* INPA/Bimmergeeks K+DCAN cable will also work and are supported for remote flashing. You will need to purchase a cable from us for remote flashes if you don't have one. 

Vehicle Fitment:

 - 2000 - 2003 BMW E46 M3 6MT - DME MSS54 - Engine: S54B30 Transmission: Manual

 - 2000 - 2003 BMW E46 M3 SMG - DME MSS54 - Engine: S54B30 Transmission: SMG

 - 2004 - 2006 BMW E46 M3 6MT - DME MSS54HP - Engine: S54B30 Transmission: Manual

 - 2004 - 2006 BMW E46 M3 SMG - DME MSS54HP - Engine: S54B30 Transmission: SMG