| EAS | Electrically Assisted Steering |
| EATC | Electronic Automatic Temperature Control |
| EBC | Electronic Brake Control |
| EBCM | Electronic Brake Control Module |
| EBD | Electronic Brake Distribution |
| EBM | Electronic Brake Module |
| EBP | Exhaust Back Pressure |
| EBTCM | Electronic Brake and Traction Control Module |
| EC | Electronic Control |
| EC-II | Energy Conserving-II (engine oil designation) |
| ECC | Electronic Climate Control |
| ECCC | Electronically Controlled Converter Clutch |
| ECD | Electronically Controlled Deceleration |
| ECL | Engine Coolant Level |
| ECM | Electronic Control Module |
| ECM | Engine Control Module |
| ECS | Electronic Crash Sensor |
| ECS | Emission Control System |
| ECT | Engine Coolant Temperature (Switch, Sensor) |
| ECU | Electronic Control Unit |
| EDF | Electric Drive Fan (relay) |
| EDIS | Electronic Direct Ignition System (replaced with EI) |
| EELQMS | European Engine Lubricant Quality Management System |
| EEPROM | Electronically Erasable Programmable Read Only Memory |
| EEV | Enhanced Environmentally Friendly Vehicles and Engines |
| EEVIR | Evaporator Equalized Values In Receiver |
| EFI | Electronic Fuel Injection |
| EGR | Exhaust Gas Recirculation |
| EGRC | Exhaust Gas Recirculation Control |
| EGRVR | EGR Valve Vacuum Control |
| EHB | Electro-Hydraulic Brake |
| EHCU | Electronic Hydraulic Control Unit |
| EHD | Elastohydrodynamic Lubrication |
| EHOC | Electrically Heated Oxidation Catalyst |
| EHPA | Electro-Hydraulic Power Assist |
| EHPAS | Electric Hydraulic Power Assisted Steering |
| EHPS | Electro-Hydraulic Power Steering |
| EHTWC | Electrically Heated Three Way Catalyst |
| EI | Electronic Ignition (includes Distributorless Ignition System, formerly DIS) |
| EKS | Electronic Knock Sensor |
| ELGI | European Lubricating Grease Institute |
| ELTC | Engine Lubricant Technical Committee (CEC) |
| EMA | Engine Manufacturers Association |
| EMB | Electro-Mechanical Brakes |
| EMCC | Electronically Modulated Converter Clutch |
| EMI | Electromagnetic Interference |
| EN | European Committee for Standardization |
| EOBD | Enhanced On-Board Diagnostics |
| EOFT | Engine Oil Filterability Test |
| EO-L/M | Mack heavy-duty diesel engine oil specifications |
| EOLCS | Engine Oil Licensingand Certification System (API) |
| EOP | Engine Oil Pressure |
| EOT | Engine Oil Temperature |
| EP | Extreme Pressure |
| EPC | Electronic Pressure Control |
| EPEFE | European Programme on Emissions, Fuels & Engine Technologies |
| EPHS | Electrically Powered Hydraulic Steering |
| EPR | Exhaust Pressure Regulator |
| EPROM | Erasable Programmable Read Only Memory |
| EPS | Electric Power Steering |
| ESB | Energy Storage Box |
| ESC | Electronic Spark Control |
| ESC | Electronic Suspension Control |
| ESD | Electrostatic Discharge |
| ESI | Extended Service Interval |
| ESM | Electronic Steering Module |
| ESP | Electronic Stability Programme |
| ESP | Electrostatic Precipitator |
| ETBE | Ethyl-T-Butyl Ether |
| ETC | Electronic Temperature Control |
| ETC | European Transient Test Cycle |
| ETC | Electronic Throttle Control |
| ETC | Electronic Timing Control |
| ETLP | Engine Tests of Lubricants Panel (IP) |
| ETS | Engineering Test Services |
| ETS | Enhanced Traction System |
| EUI | Electronic Unit Injector |
| EUROPIA | European Petroleum Industry Association |
| EV | Electric Vehicle |
| EVA | Ethyl Vinyl Acetate |
| EVA | Electronic Vibration Analyzer |
| EVAP | Evaporative Emission |
| EVIC | Electronic Vehicle Information Center |
| EXH | Exhaust |
