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Hellen Plug& Play for ME7 VAG vehicles
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[[Schematics rev a]](https://github.com/rusefi/hellen121vag/raw/main/boards/hellen121vag-a/board/hellen121vag-a-schematic.pdf)
[[iBom rev b]](https://rusefi.com/docs/ibom/hellen121vag-b-ibom.html)
[[Pinout]](https://rusefi.com/docs/pinouts/hellen/hellen121vag/)
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[KiCAD source files ](https://github.com/rusefi/hellen121vag )
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Status: landed in USA!
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## Hardware features
* knock detection module with headphone jack
* build-in WBO - WARNING 4.2 software not ready while we believe that hardware is universal (footprint, stm32f042 not in stock at JLC)
* Baro sensor LPS25HB (footprint, not populated by JLC)
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[Connector Vehicle Pinout reference table ](https://docs.google.com/spreadsheets/d/1H0cZPAJFbpprgSu1Y8BiAYzXbqddvIn-Hhod4QCVQwk )
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[[VAG-B5]]
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[[VAG-C5]]
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## Q: what cars is the 121vag applicable for?
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A: We do not know the whole list. Definitely B5 1.8T Passat but could also work on 5 cylinder Jetta and VR6 and even a 8 cylinder A8. Whatever VAG product with a 121 header please check Hellen pinout above and let us know :)
