The 2012 Nissan Murano typically has two catalytic converters in its exhaust system.
In the 2012 Murano, equipped with the 3.5-liter V6, Nissan generally uses a dual-cat exhaust design that places one catalytic converter close to the engine and a second one downstream in the exhaust path. This arrangement helps the vehicle meet emissions standards while maintaining proper exhaust flow. While two converters are standard for most US-spec models, variations can exist by market or trim due to regional emissions requirements.
Where the converters sit in the exhaust
What follows is a concise breakdown of the two-cat setup and its typical placement in the Murano’s exhaust layout.
- Close-coupled catalytic converter: Located near the exhaust manifold, this first cat begins the emissions reduction process soon after exhaust exit from the engine.
- Downstream catalytic converter: Placed further back in the exhaust stream, this second cat continues to reduce pollutants as exhaust travels toward the tailpipe.
These two converters work in sequence, with sensors placed to monitor efficiency and performance across the system. The exact sensor arrangement can vary by model year and market, but the dual-cat configuration is the standard setup for the 2012 Murano with the 3.5L V6.
Why this setup matters
A dual catalytic converter arrangement provides more effective emissions control and helps the vehicle meet stringent standards without compromising exhaust flow or performance. It also influences maintenance considerations, such as the replacement costs and potential failure points along the exhaust path.
Maintenance and troubleshooting notes
If you suspect catalytic converter issues—such as reduced performance, poor fuel economy, or diagnostic trouble codes related to emissions—it's important to have a professional diagnose the system. Replacing or repairing catalytic converters involves proper certification and adherence to local regulations.