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Unitronic Performance Software - With UniCONNECT+ Cable

Choose the stage that meets your power goals!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th
Unitronic
Unitronic
ES#:
4389476
Mfg#:
20TSI-IS20-UC
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Unitronic Performance Software - With UniCONNECT+ Cable

Starting at: $14.99
SALE: 14.99
Starting at: $14.99
WAS: $814.99 on 05-21-2026

This product was last offered at the strikethrough price on
05-21-2026


Sale Save 98%
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This product is lifetime replacement eligible
This product is backed by our
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Availability:
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Est. Ship Date:
on Jul 6, 2026
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Unitronic Performance Software - Stage 1 - With UniCONNECT+ Cable
Gain up to 87 horsepower and 88 ​lb-ft of torque on 91 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4365334 20TSI-IS20-1-UC
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 18% $814.99

This product was last offered at the strikethrough price on
06-22-2026

664.99
Unitronic Performance Software - Stage 1 - With UniCONNECT+ Cable & DSG Software
Gain up to 87 horsepower and 88 ​lb-ft of torque on 91 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4368026 20TSI-IS20-1D-UC
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 12% $1264.99

This product was last offered at the strikethrough price on
06-22-2026

1114.99
Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable
Gain up to 100 horsepower and 89 ​lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4365337 20TSI-IS20-1+-UC
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 17% $864.99

This product was last offered at the strikethrough price on
06-22-2026

714.99
Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable & DSG Software
Gain up to 100 horsepower and 89 ​lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4368028 20TSI-IS20-1+D-U
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 11% $1314.99

This product was last offered at the strikethrough price on
06-22-2026

1164.99
Unitronic Performance Software - Stage 2 - With UniCONNECT+ Cable
Gain up to 127 horsepower and 112 ​lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4365339 20TSI-IS20-2-UC
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
764.99
Unitronic Performance Software - Stage 2 - With UniCONNECT+ Cable & DSG Software
Gain up to 127 horsepower and 112 ​lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4368030 20TSI-IS20-2D-UC
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 10% $1464.99

This product was last offered at the strikethrough price on
06-22-2026

1314.99
Unitronic Performance Software - Stage 2+ - With UniCONNECT+ Cable
Gain up to 171 horsepower and 119 ​lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4365341 20TSI-IS20-2+-UC
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 13% $1164.99

This product was last offered at the strikethrough price on
06-22-2026

1014.99
Unitronic Performance Software - Stage 2+ - With UniCONNECT+ Cable & DSG Software
Gain up to 171 horsepower and 119 ​lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
4368032 20TSI-IS20-2+D-U
Availability:
In Stock
Est. Ship Date:
in 1 Business Day
This product is lifetime replacement eligible Lifetime Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Sale
SAVE 9% $1714.99

This product was last offered at the strikethrough price on
06-22-2026

1564.99

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Product Details

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th

Features:

  • Engineered with Strict Industry Standards
  • Extensively Tested Under Various Driving Conditions
  • Factory Safety Limiters Retained
  • Advanced Torque Management by Gear (For maximum acceleration)
  • Engine Temperature Protection (Rev Limit based on Engine Coolant Temperature)
  • Optimized Responsiveness and Drivability
  • Optimized Smoothness and Driving Comfort
  • Power Delivery Perfectly Optimized Throughout the Power Band
  • Improved Fuel Efficiency
  • Speed Governor Removed

Stage 1+ Adds:

  • Ignition Timing Precisely Calibrated for Higher Octane Fuel

Stage 2 Adds:

  • Exhaust Overrun/Crackle Enabled

Required Hardware For Stage 2:

  • 3 inch downpipe

Required Hardware For Stage 2+:

  • Stage 2+ Turbo Upgrade Kit for 2.0 TSI Gen3 MQB FWD by Unitronic
  • *Unitronic cannot guarantee results for Clients using third-party hardware and results may vary as a result. Post-sale technical support can not be provided by Unitronic or its affiliates for Clients using third-party hardware.

 

Note: Performance Software for your ECU Box Code is subject to availability.

 

DSG Software Features:

  • Engineered with Strict Industry Standards
  • Extensively Tested Under Various Driving Conditions
  • Optimized Responsiveness and Drivability
  • Optimized Smoothness and Driving Comfort
  • Rpm Limiter Increased to 6800
  • Optimized "D" and "Sport Mode
  • Gear Display Enabled in D and S Mode
  • Launch Control increased to 3600
  • Optimized cruising upshift setpoint for maximum responsiveness
  • Sport Mode Wide Open Throttle Upshifts optimized for maximum acceleration

Stage 2 DSG Software Adds:

  • Launch Control increased to 4000

 

Note: Performance Software for your TCU Box Code is subject to availability.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
Audi A3 8V Quattro 2.0T Use vehicle selector to confirm fitment
Audi MK3 TT (2014+) Quattro 2.0T Use vehicle selector to confirm fitment
Volkswagen Golf VII Hatchback 2.0T Gen3 Use vehicle selector to confirm fitment
Volkswagen Golf VII Facelift FWD 2.0T Gen3 Use vehicle selector to confirm fitment
Volkswagen Jetta VII GLI 2.0T Gen3 Use vehicle selector to confirm fitment
Volkswagen Jetta VII GLI Facelift 2.0T Gen3 Use vehicle selector to confirm fitment
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.
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