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Volkswagen MK4 Performance ECU Software / Tuning

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Average gain of 18 horsepower and 22 lb-ft of torque on 93 Octane affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Tunezilla - Corporate Logo
ES#:
3097341
Mfg#:
28-VR6-12V-1
Ships in 7 Business Days
$349.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

For customers that already have APR software on their car and are upgrading to a K04 Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.

Brand:
APR - Corporate Logo
ES#:
2063666
Mfg#:
APRKO4TRV-SWUSRV
In Stock
$325.99 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#4465329 - 1.9-BEW - Unitronic Performance Software - Flashed @ ECS - Choose the stage that meets your power goals! - Unitronic - Volkswagen

Choose the stage that meets your power goals! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next
For vehicles with BEW engine code only

Brand:
Unitronic - Corporate Logo
ES#:
4465329
Mfg#:
1.9-BEW
In Stock
ON SALE!
Starting at $300.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2951983 - ve-tdi-stlKT - VE TDI Feature Standalone Tune - With FlashZilla V3 - Standalone tune for Dynamic Idle, Idle RPM change, Left-foot-brake fix, Glow plug duration increase, Hot-start fix, or all the above - Tunezilla - Volkswagen

Standalone tune for Dynamic Idle, Idle RPM change, Left-foot-brake fix, Glow plug duration increase, Hot-start fix, or all the above affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Only to be purchased individually. For vehicles from the 2000 model year only.

Brand:
Tunezilla - Corporate Logo
ES#:
2951983
Mfg#:
VE-TDI-STLKT
Ships in 7 Business Days
$289.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2952000 - pd-tdi-stlKT - PD TDI Feature Standalone Tune - With FlashZilla V3 - Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above - Tunezilla - Volkswagen

Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Only to be purchased individually

Brand:
Tunezilla - Corporate Logo
ES#:
2952000
Mfg#:
PD-TDI-STLKT
Ships in 7 Business Days
$289.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4464765 - 2.0-8V - Unitronic Performance Software - Flashed @ ECS - Choose the stage that meets your power goals! - Unitronic - Volkswagen

Choose the stage that meets your power goals! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Brand:
Unitronic - Corporate Logo
ES#:
4464765
Mfg#:
2.0-8V
In Stock
ON SALE!
Starting at $200.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4465323 - 1.9-ALH - Unitronic Performance Software - Flashed @ ECS - Choose the stage that meets your power goals! - Unitronic - Volkswagen

Choose the stage that meets your power goals! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next
For vehicles with ALH engine code only

Brand:
Unitronic - Corporate Logo
ES#:
4465323
Mfg#:
1.9-ALH
In Stock
ON SALE!
Starting at $200.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2063652 - APRTHEFT-SRV - Anti-Theft Service - *Sale applies only to ECU with 3 or 4 program purchase. - APR - Audi Volkswagen

*Sale applies only to ECU with 3 or 4 program purchase. Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.

Brand:
APR - Corporate Logo
ES#:
2063652
Mfg#:
APRTHEFT-SRV
In Stock
$199.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Upgrade any tune with Immobilizer Delete affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Only to be purchased in conjunction with another tune
For vehicles from 2004 model year only

Brand:
Tunezilla - Corporate Logo
ES#:
3546629
Mfg#:
IMMODELETE
Ships in 7 Business Days
50% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$199.00

This product was last offered at the strikethrough price on
06-06-2026

$99.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Upgrade your tune with Launch Control affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Only to be purchased in conjunction with another tune

Brand:
Tunezilla - Corporate Logo
ES#:
4172090
Mfg#:
18T-20V-UPD
Ships in 7 Business Days
$149.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Only to be purchased individually

Brand:
Tunezilla - Corporate Logo
ES#:
2917817
Mfg#:
PD-TDI-STL
Ships in 7 Business Days
$99.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Standalone tune for Dynamic Idle, Idle RPM change, Left-foot-brake fix, Glow plug duration increase, Hot-start fix, or all the above affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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

Brand:
Tunezilla - Corporate Logo
ES#:
2917830
Mfg#:
VE-TDI-STL
Ships in 7 Business Days
$99.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4714892 - JB4-OBDII-CA-MC  - JB4 OBDII Cable - With JB4 side Repair Harness - 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. - Burger Motorsports - Audi BMW Volkswagen Mercedes Benz MINI Porsche

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. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Burger Motorsports - Corporate Logo
ES#:
4714892
Mfg#:
JB4-OBDII-CA-MC
Ships on Jun 23, 2026
$30.00 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#2063654 - APRSECPRG-SRV - Security Lockout Service - *Sale only applies to purchases to ECU with 3 or 4 program options - APR - Audi Volkswagen

*Sale only applies to purchases to ECU with 3 or 4 program options Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
This upgrade must be performed at ECS Tuning's facility in Ohio.

Brand:
APR - Corporate Logo
ES#:
2063654
Mfg#:
APRSECPRG-SRV
In Stock
$59.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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

Brand:
Tunezilla - Corporate Logo
ES#:
2917831
Mfg#:
VE-TDI-UPD
Ships in 7 Business Days
49% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$99.00

This product was last offered at the strikethrough price on
06-06-2026

$50.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2952170 - VE-TDI-UPD-FZ - VE TDI Feature Upgrade Tune - For Use With FlashZilla V3 - Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above - Tunezilla - Volkswagen

Upgrade any tune with Dynamic Idle, Idle RPM change, Glow plug duration increase, or all the above affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Only to be purchased in conjunction with another tune

Brand:
Tunezilla - Corporate Logo
ES#:
2952170
Mfg#:
VE-TDI-UPD-FZ
Ships in 7 Business Days
49% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$99.00

This product was last offered at the strikethrough price on
06-06-2026

$50.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Performance ECU Software / Tuning

Add power and performance with special ECU software upgrades from recognized tuning leaders like APR, 034Motorsport, Unitronic, Integrated Engineering. Let our trained support staff show you how to pick the performance ECU software upgrade that suits your driving preferences and budget.

Let us help you find the parts that fit your Volkswagen

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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