The 2018 Honda Pilot typically has two catalytic converters in its exhaust system.
Powered by a 3.5-liter V6, the Pilot uses a two-part catalytic converter setup to meet emissions standards. One converter is mounted close to the engine (close-coupled), and a second converter sits further downstream in the exhaust stream. This two-converter arrangement is standard for the model year and engine, though exact configurations can vary by market or trim.
Overview of the exhaust system
Understanding the two catalytic converters helps explain why replacement parts may be needed in pairs and how diagnostics may identify issues with one or both units.
Converter locations
The exhaust system for the 2018 Pilot includes two catalytic converters:
- Front close-coupled catalytic converter near the exhaust manifold
- Secondary catalytic converter located downstream in the mid-pipe
These two units work together to reduce pollutants before the exhaust leaves the vehicle. The front converter warms up quickly to begin emissions control soon after startup, while the second converter provides additional conversion capacity as exhaust flow increases.
Maintenance and diagnostics
When diagnosing emissions codes or performance issues, technicians typically inspect both catalytic converters and related oxygen sensors to determine if one or both are failing. Replacements are generally performed in tandem if both are damaged or under warranty coverage requires it.
Summary
Bottom line: A 2018 Honda Pilot has two catalytic converters—one near the engine and one downstream along the exhaust path.