Mythdoc

The JB4 chip tuner has just been released for the 2021 version of the EA888, and I ordered one. I’m looking for a little extra power, especially in the lower RPMs with hopefully very little or no loss of fuel efficiency. I am a geezer, not a racer… certainly not one to thrash the engine, though I wouldn’t say I baby it, either. (I do make a point to mash it one or twice per outing for engine health). I have been averaging over 31 MPG on my allroad covering just under 3000 miles since new (mostly highway and rural driving).

The unit is pricey at $529 plus connector but we all have our priorities and I guess I just decided this was one of mine, lol.

It was designed for the A4 sedan and allroad, and the A5 shipped this MY+

I’ll report back my impressions here. I’m psyched to be one of the first to try it out.

JB4 version 16

Mythdoc

Correction: the Q5 engines used in MY 2021 and 2022 are still the previous generation and use a different JB4 version.

Mythdoc

One more try: according to Burger Motorsport, it works on these engines using the new generation EA888:

2021+ Audi B9.5 A4/5 45TFSI
2021+ Audi B9.5 Q5 45TFSI
2021+ Audi C8 A6 261hp
2021+ Audi C8 A7 261hp
2021+ Porsche Macan

Mythdoc

I did install the device and it’s working well. In order not to duplicate info, I have posted in another forum where there is more frequent posting related to mods of various kinds. Here, the engine specific threads are not looked at much.

Install JB4 for 2021+ 2.0 Liter TFSI

pricobelli

I bought the JB4 including a Bluetooth module, so I could change maps on the fly, by using a mobile app.
It drained my battery in 4 hrs. JB4 support recommends returning to the previous firmware, which is not a simple task. I decided to get deeper into the technicals and found out that JB4 is based on a concept that constantly overrides ECU parameters and simultaneously keeps running a routine to erase (in real-time) all the errors (a lot of them) that this override generates. I find it a very poor concept not to mention the malfunctioning issue. I could notice the power increase though.
I can send it to whoever wants, for free. Dont want it near my car.
thanks!

Mythdoc

Wow! I wish I could have gotten mine for free. I love it and haven’t had any issues, battery or otherwise

GARS38Y

This is not true. You talking about a feature that is called Passive delete and is used when cars are fitted with a downpipe. This is blocked anyway in the US for legal reasons and cannot be activated so in essence all users would be have the errors you mention.

B9.5_A5

are you still looking for someone to send this to?