Average gain of 20 horsepower and 34 lb-ft of torque
For vehicles from the 2000 model year only. Vehicles older than 2000 require ECU removal and physical chip swapping which cannot be done at ECS Tuning.
Volkswagen MK4 Performance ECU Software / Tuning
Average gain of 19 horsepower and 14 lb-ft of torque on 93 Octane
Average gain of 18 horsepower and 22 lb-ft of torque on 93 Octane
For customers that already have APR software on their car and are upgrading to a K04
Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.
Standalone tune for Dynamic Idle, Idle RPM change, Left-foot-brake fix, Glow plug duration increase, Hot-start fix, or all the above
Only to be purchased individually. For vehicles from the 2000 model year only.
Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above
Only to be purchased individually
*Sale applies only to ECU with 3 or 4 program purchase.
Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.
Upgrade any tune with Immobilizer Delete
Only to be purchased in conjunction with another tune
For vehicles from 2004 model year only
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
07-22-2026
Upgrade your tune with Launch Control
Only to be purchased in conjunction with another tune
Standalone tune for Dynamic Idle, Idle RPM change, Left-foot-brake fix, Glow plug duration increase, P0128 fix, Cruise Control fix or all the above
Only to be purchased individually
Standalone tune for Dynamic Idle, Idle RPM change, Left-foot-brake fix, Glow plug duration increase, Hot-start fix, or all the above
Only to be purchased individually. For vehicles from the 2000 model year only. Vehicles older than 2000 require ECU removal and physical chip swapping an
*Sale only applies to purchases to ECU with 3 or 4 program options
Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.
Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above
Only to be purchased in conjunction with another tune. For vehicles from the 2000 model year only. Vehicles older than 2000 require ECU removal and physi
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
07-22-2026
Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above
Only to be purchased in conjunction with another tune
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
07-22-2026
Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash. Includes JB4 side repair harness molex pigtail.
Average gain of 43 horsepower and 34 lb-ft of torque
Requires VNT-17 turbo upgrade, 3.0 bar MAP sensor, and upgraded fuel injectors. For vehicles from the 2000 model year only. Vehicles older than 2000 requ