Two catalytic converters, one on each bank of the V6 engine.
Across most Nissan Murano models, the exhaust system uses a dual-cat layout designed to meet emissions requirements while preserving performance. While the exact placement can vary by generation and market, the standard count is two converters in total—one for each bank of the engine. Owners and buyers should still verify the specific configuration for their VIN, as regional variations or dealer-installed options can influence the layout.
Generation overview and layout
To help owners understand what to expect across generations, here is a generation-by-generation snapshot of the Murano’s catalytic converter setup.
Key notes on the dual-cat system
- Gen 1 (approximately 2003–2007): Two catalytic converters, one on each bank of the 3.5L V6 (VQ35DE). Some configurations place a pre-cat near the exhaust manifolds and a downstream main-cat farther back in the system.
- Gen 2 (approximately 2009–2014): Two catalytic converters, one on each bank, with layout adjustments to meet evolving emissions standards in various markets.
- Gen 3 (approximately 2015–present): Two catalytic converters, one on each bank, continuing the dual-bank arrangement but with refinements in placement and sensors to comply with current regulations.
In practice, most Murano models use two catalytic converters. If you’re inspecting a specific vehicle, consult the service manual or a parts diagram for your exact VIN to confirm the configuration.
Maintenance considerations
Because the Murano’s catalytic converters work in tandem with oxygen sensors and other exhaust components, planning for inspection, repair, or replacement involves several related parts and costs.
- Common symptoms: reduced engine performance, a check engine light with emissions-related codes, unusual exhaust sounds, or diminished fuel economy can indicate catalytic converter or sensor issues.
- Related components: in addition to the two cats, forward and downstream oxygen sensors, pre-cats, and the exhaust piping all play a role in proper operation and diagnostic readiness.
- Cost and process: replacing one or both catalytic converters can be several hundred to over a thousand dollars per unit, depending on OEM versus aftermarket parts and local labor rates; professional installation is often recommended due to emissions testing considerations.
If you notice symptoms, an inspection by a qualified mechanic is advisable to determine whether the issue lies with a catalytic converter, a sensor, or another part of the exhaust system.
Summary
The Nissan Murano typically features two catalytic converters—one for each bank of its V6 engine. This dual-bank configuration has been consistent across generations, with variations mainly in exact placement and sensor integration to meet evolving emissions standards. When in doubt, verify the exact setup for your vehicle using the VIN or a trusted parts diagram, and consult a professional for maintenance or replacement.