Where is the ECU located in a Honda?
In most Honda cars, the Engine Control Unit (ECU), also called the ECM, is located in the engine compartment on the passenger side near the firewall.
However, the exact location varies by model and year. In many Hondas, the ECU sits in a rectangular housing in the engine bay with a large multi-pin connector. Some older or special trims place the ECU under the dash on the passenger side behind the glove box. For the precise location on your specific vehicle, consult the owner's manual or a service manual for your year and model.
Common ECU locations
The most frequent placements you’ll encounter across Honda cars are summarized here.
- Engine compartment, passenger side near the firewall (the typical spot).
- Under the dash on the passenger side, behind the glove box (the alternative for several older models).
ECUs are usually housed in a rectangular enclosure, often metal or rugged plastic, with a single large connector on the side connected to the engine and vehicle wiring harness.
Note for newer or unusual layouts
While the two locations above cover the majority of Hondas, a handful of specific models or generations may place the ECU differently, especially in hybrids or vehicles with more compact electronics packaging. If in doubt, refer to the service manual or ask a dealer technician for your exact year and trim.
Summary
For a quick answer: check the engine bay on the passenger side near the firewall first. If not found there, look under the dash on the passenger side behind the glove box. Exact placement depends on model and year—verify with the owner's manual or service documentation for your specific Honda.
