difference between k03-005 and ko3-029

[dirtyb5a4]

i was looking at a k03-005 that was laying around the shop and noticed that the exhaust side seemed a little smaller than the k03-029 that i have at home. what is the difference between the two? any advantages to either?

[lotusgardener]

One is a K03, the bigger one is a k03s.

[dirtyb5a4]

im guessing it wouldnt be worth it to put it on unless my old on goes bad?

[lotusgardener]

If your car is chipped it'll give you that extra PSI of two, but yeah probably not worth it until yours goes bad.

[dirtyb5a4]

If your car is chipped it'll give you that extra PSI of two, but yeah probably not worth it until yours goes bad.

i wish it was chipped, no one can connect to my ecu

[NorCal1.8T]

i wish it was chipped, no one can connect to my ecu

what do you mean by that? There are no shops around? You could always ship the ecu to get it chipped/flashed they do a quick turnaround for shipping

[Avant Nate]

Just look at your ECU for the serial #. There's always someone selling there old ECU with a chip in it with the matching number. $300 seems to be about the going rate. That's what I did.

[dirtyb5a4]

ive had two shops try. im pretty sure someone cut a wire when they put a system in the car. and i would buy a chiped ecu if i could find one

[ThatA4T]

keep ur eyes open they are around

[geeky]

The different specs between the K03-005 and K03-029 can be found in this thread near the bottom

http://www.audizine.com/forum/showthread.php?t=339475

[Avant Nate]

What would happen if you are running the APR tune for the 005 and replaced it with the 029? Are the differences so slight that its no biggie? In the little info I've found you don't want to run a K04 with the APR K03 tune, even though its not a big deal to run the K04 with stock.

Looking for an ECU? Try the VWVortex forums for Audis and Passats. My ECU is from a Passat.http://forums.vwvortex.com/

[walky_talky20]

Are the differences so slight that its no biggie?

Exactly. People swap them out all the time. Honestly, a test pipe (cat-delete pipe) would probably make more of a difference. That being said, if you have one put it on.

[dirtyb5a4]

What would happen if you are running the APR tune for the 005 and replaced it with the 029? Are the differences so slight that its no biggie? In the little info I've found you don't want to run a K04 with the APR K03 tune, even though its not a big deal to run the K04 with stock.

Looking for an ECU? Try the VWVortex forums for Audis and Passats. My ECU is from a Passat.http://forums.vwvortex.com/

a passat ecu will run a audi a4 quattro? i know they are very similar but i didnt think the ecu's would be the same

[Altech75]

a passat ecu will run a audi a4 quattro? i know they are very similar but i didnt think the ecu's would be the same

Yeup, a couple of the 99 and 99.5 models even came with the AEB engine. They're exactly the same except from the tranny back. A frontrack B5 A4 and a B5 Passat are virtually the exact same thing.

[Avant Nate]

I think my ECU was from a 98-99 passat AT. As long as the model #s match up, mine was a 557p. Just popped it in, used Vag-com to switch from AT to MT and I was chipped.

[dirtyb5a4]

I think my ECU was from a 98-99 passat AT. As long as the model #s match up, mine was a 557p. Just popped it in, used Vag-com to switch from AT to MT and I was chipped.

I definitely didnt know the ecu could be switched from AT to MT

[Avant Nate]

This is how I did it: There are other ways you can google.

Copied and pasted from:
http://www.passatworld.com/forums/sh...d.php?t=299114

1. Remove new ECU from vehicle

2. Install the old ECU back in vehicle

3. Connect Vag-Com to your car

4. Turn ignition to the on position but don't start the vehicle

5. Click on SELECT and click on 01-ENG

6. Vag-Com will establish communication with the ECU and post some codes on these blocks: VAG NUMBER, COMPONENT, SOFT CODING, SHOP# & EXTRA.
Write down the code in block SOFT CODING.

7.Reinstall the new ECU and repeat steps 3-6

8.If code in block SOFT CODING is differnt from the code you got from the old ECU you need to recode your new ECU.

9.To do so click Coding-07

10.Change the number in SOFT CODING block to match the numbers from old ECU.

11. Click DO IT!

12. Click Close Controller Go Back-06

13. Click Go Back

14. Click Exit

15. Reopen Vag-com

16. Click on SELECT and click on 01-ENG

17. Vag-Com will establish communication with the ECU and post some codes on these blocks: VAG NUMBER, COMPONENT, SOFT CODING, SHOP# & EXTRA.
Make sure that the code in block SOFT CODING changed to the new number that you have input, it will be the same as the old ECU.

18. If so you are done and the new ECU has been recoded. Enjoy.

[black99.5a4]

if they installed a system and now it wont connect, i forget which one ,but get a bentley, one of your wires from your data port runs up to the radio, its prob disconnected.

[walky_talky20]

Yeup, a couple of the 99 and 99.5 models even came with the AEB engine. They're exactly the same except from the tranny back. A frontrack B5 A4 and a B5 Passat are virtually the exact same thing.

Correct, and unbeknownst to some, the B5 Passat "4-Motion" is the same drivetrain as the B5 A4 quattro. Same torsen center diff, etc. I suppose the drive shaft is a bit longer on the Passat, though.

[orttauq]

if they installed a system and now it wont connect, i forget which one ,but get a bentley, one of your wires from your data port runs up to the radio, its prob disconnected.

It's the K wire. Factory radio communicates with the ECU. With some aftermarket head units you have to cut it.

[spyder101]

It's the K wire. Factory radio communicates with the ECU. With some aftermarket head units you have to cut it.

X2^^^The K wire MUST be in place or looped so the ECM can communucate.

[dirtyb5a4]

does anyone have a picture of the K line?