OHAR — Online Help Auto Repair

Software for diagnosing and repairing diesel fuel systems. We develop it ourselves and give it away for free.

Programs

OHAR.App
The main application: injector database for Bosch EM (110/120), Bosch Piezo, Bosch NF, Denso EM, Delphi EM, Siemens and mechanical injectors. Search by part number and parameters, images, firmware (after sign-in), parts availability and ordering.
OHAR.Android
Mobile version of the injector database (beta).
OHAR.Oscillograms
Viewing and analysing injector control oscillograms.
OHAR.InjectorCoder
Working with injector codes and editing firmware.
OHAR.Manager
Managing OHAR data.
OHAR.Manometer
Pressure measurement and monitoring.

October 15, 2026
OHAR rebranding: new website addresses
We have refreshed the OHAR websites and moved from 9270104.ru to https://ohar.su and https://ohar.eu. Software, news and community links are now available at the new addresses —…