Has anyone installed/driven/seen this device on a 535ix? If so does it resolve the acceleration lag? It's a bit pricey and installation sounded easy in beginning of article(plug and play) to a little tricky by the end(splicing a couple of wires) and a wide install time gap (30-120mins)

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4 responses to Kellener's sport power modular

Alan L. commented:
August 9, 2012, 9:22 am

Kelleners power pack is basically a rebadged Hartge power pack from what i gathered online. They sell it at Turnermotorsport for about $1300. The device works pretty much just like the JB4 in concept but i'm sure they have different adjustments. The problem with the Hartge tune is that they offer zero warranty and support for non Europe customers so you are on your own if you run into any issues. Thats what Turner told me when i inquired about it.

tim330i commented:
August 9, 2012, 11:22 am

I drove TMS's F30 335i with the Hartge module and it does make a difference, a big one. It really wakes up the car, it was a very obvious difference in performance. I would think you'd see the same increase on the 535 as well.

coolfrank commented:
August 10, 2012, 3:50 am

So this probably would not help the response gap from zero? It seems that others say the delay is a transmission issue not throttle. I also looked at the sprint booster but was told it was nice but didn't help delay
schnell525 commented:
August 10, 2012, 4:13 am

when my 2011 535xi has warrantly work done due to it's suspension, factory programming was redone at the dealer via Germany. it did eliminate the lag issue on my 2011 so i due think there is some ambiguity on what some (dealer service depts) see on test rides vs. what we feel in the seat of the pants.

after the reload of new software (care was in due ot steering problems) hesitation issue went away.