The ultimate chip upgrade for the B6 A4 1.8T engine is available from APR. After months of long nights and many hours of dyno work we are pleased to offer you chip tuning that is second to none. We have 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.

Stage I ECU Upgrade

Stage I software gives you 215 horsepower and 245 lb-ft. of torque. This software is the ultimate upgrade for the new B6 A4 and gives it just the extra edge these cars lack from the factory, without pushing the limits. With factory like smoothness and drivability, the new power will fill the void in an otherwise excellent car.

Stage I+ ECU Upgrade

Stage I+ software, along with larger fuel injectors, provides even more horsepower and torque, raising the output to 235 and 275, respectively. While not an extreme upgrade, the Stage I+ gives the A4 a bit more performance without sacrificing drivability or smoothness. For optimal results, our cat-back exhaust system is highly recommended with the use of the Stage I+ system.

APR chips are available in an octane specific version for the octane of gasoline that you typically run in your car. The power that the chip makes also depends on which ECU is in your vehicle. The A4 1.8T ECU can be upgraded with either the use of a soldered in EMCS module, or DirectPort Programming. For more information on DirectPort Programming, please see the DirectPort page. For more information on the ECU upgrade, please see the charts below.

Version	Year	Model	Engine	91 Octane Chipped	93 Octane Chipped	DirectPort Available	Price
Stage I	2002-05	A4	1.8T	209hp/236lb-ft	215hp/245lb-ft	Y	$499.00
Stage I+	2002-05	A4	1.8T	229hp/271lb-ft	235hp/275lb-ft	Y	$499.00*
* Stage I+ requires either APR or Bosch Fuel Injectors, which are available from APR for $500.

All APR chip upgrades use encryption, which serve several purposes. Mainly, it keeps prying eyes out of our 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 upgrades. There is also a lifetime warranty against defects in the software or soldering. All chip upgrades have a 30-day Money Back Guarantee.

EMCS is available for this car. EMCS is APR's revolutionary patent pending Enhanced Modular Chipping System. EMCS is an industry leading technology that brings many new features to the automotive enthusiast. This technology was developed exclusively by Audi Performance & Racing, LLC and demonstrates APR's continued commitment to lead the industry with the most technologically advanced products available.

Want chipped mode? Want to be able to switch back to your stock settings? Want a race mode to run 100 octane fuel at the track? How about a valet mode that limits power? EMCS is the lone technology on the market that can give you all of these options. No changing of the chip or ECU is required. These programs are available at the touch of a button.

APR has taken your cruise control buttons and utilized them for this function. Your cruise control will continue to function as normal, but will give you the ability to scroll through the programs you have purchased on your APR chipped ECU. The procedure is simple and involves only two steps.

Step 1: Press and hold the "set" button on your cruise control. After approximately five seconds, the "check engine" light on your dash will begin to blink once per second. This will tell you that you are activating program one. This blinking sequence will continue for approximately five seconds.

After this five second interval, the "check engine" light will begin blinking twice per second. This will indicate that you have activated the second program. This process is continued to access any remaining programs you may have purchased. (three blinks = program three, four blinks = program four).

Step 2: Once you have activated the desired program, simply release the "set" button. The "check engine" light will go off, and you will be locked in that program until you change it.

It's that simple.

APR's EMCS is a truly modular system that allows for future enhancements and features to be added as they are developed without the need for additional hardware. EMCS makes the following advanced features possible:

EMCS PRICING
All APR chips now include EMCS hardware. EMCS options are available at an additional cost over the normal price of a chip. Please remember that even if you do not purchase any of the following options, you will still be able upgrade to these options from most any internet accessible computer at a later date. Above the price of the chip for your car, the following options can be added to your ECU:

 APR ECU Modification Order Form(119K pdf)

A third option is to order a spare ECU and have us install the modified chip before sending it on to you. This will allow one to swap the stock engine computer back in when getting the car serviced. The spare ECU's that we sell are new factory units. Because of this, there are no refunds on spare ECU's, only on the APR software. For more information on this, see the Terms and Conditions of Sale. Spare 02+ A4 ECU's start at additional $500.