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The first thing you should do is to get a PIWIS or equivalent hooked up to read the complete fault codes. Getting basic real time data is also very helpful in determining the specific issue. Do not try the "easy" actions (battery, calibration, fluid change) without first determining the root cause as this is unlikely to resolve your issue.
Probably not. There's only a few scenarios where a calibration or fluid change will resolve a PDK issue. As a matter of fact, it's possible that running an unnecessary calibration could result in more issues than you started with.
No. In most cases all you need is a Puller / Pusher kit and a PIWIS tool. Both can be obtained for under $300 using instructions provided on the PDK Pirates website. Detailed instructions allowing any competent workshop or serious DIY'er to replace the sensor are also provided.
Well that depends. While the instructions offered on this website and the latest sensor and tool offerings put this in the price range where it's worth considering we don't think this is appropriate for all owners. We have not seen data that clearly correlates failures to a certain age or mileage, if anything failures seem to be more tied to high temperature exposure. You may want to consider preemptive replacement more if the car has spent time on the track in the summer in Texas than if it has been dally driven in the Northeast. For you track drivers you may want to consier it too as the cost of a lost track weekend can be pretty high.
We are not set up to offer repair services at volume but may be able to assist on a case-by-case basis. Please contact us directly for more information.