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APR - ECU Upgrade - K04 Mk4 GTI / GLI / Jetta 1.8t, 2000 to 2005


Please note, all DirectPort upgrades must be done IN-HOUSE at one of NGP's two locations. You must send your ECU to NGP Aberdeen for all other EMCS hard chips, we cannot ship a chip that has not been installed. Email for all inquires on sending in your ECU for upgrading at NGP.

The ultimate chip upgrade for the Mk4 GTI / Jetta 1.8t engine is available from NGP and APR. After months of long nights and many hours of dyno work APR is pleased to offer you chip tuning that is second to none. APR worked hand in hand with many customers to deliver a chip that works. Expect huge increases in low-end torque, improved throttle response and a smoother, more powerful top end.

K04 ECU Upgrade

With no other mods than an APR Turbo-Back Exhaust, the kit made 242hp/268lb-ft on 91 octane gas, and 245hp/275lb-ft on 93 octane gas. Although the exhaust is not required, it is highly recommended.

In independent testing, NGP has seen as much as 220whp / 275wtq+ with the APR K04 programming while running a standard K04-01, APR Turbo inlet hose, intercooler, intake, and exhaust.

The Mk4 GTI / Jetta 1.8t ECU can be upgraded via DirectPort Programming or EMCS hard chip programming depending on the ECU. For more information on your options, please contact NGP Racing at For more information on the ECU upgrade, please see the charts below.

Available programs:*

  • -Stock
  • -91 Octane
  • -93 Octane
  • -100 Octane
  • -Security Lock
  • -Throttle body Alignment / Fault Code Erase
  • -Anti-theft

 *Not all options are available for all ECU models.

All APR chip upgrades use encryption, which serve several purposes. Mainly, it keeps prying eyes out of the software and prevents lesser companies from copying the chip and degrading the product. Also, all APR software is undetectable to a dealers VAG diagnostic tool.

All APR chip software comes with lifetime free updates. There is also a lifetime warranty against defects in the software. All chip upgrades have a 30-day Money Back Guarantee.

More Information
Brand APR
Stock Type N/A
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