The short answer is that the count depends on the engine installed in the vehicle. Most 2001 Xterras with the 3.3-liter V6 have two catalytic converters, while the four-cylinder version typically uses a single catalytic converter.
In 2001, Nissan offered Xterras with at least two engine options. The V6-powered models (VG33E) commonly use a dual-cat exhaust arrangement—one converter per bank of the V6—whereas the four-cylinder KA24DE version generally employs a single catalytic converter along the exhaust path. This article lays out the typical configurations and how to identify them on a given truck.
Engine options and converter configurations
V6 VG33E 3.3 L configuration
Most 2001 Xterras powered by the 3.3 L V6 use two catalytic converters—one for each bank of the engine. This dual-cat setup aligns with the common design for V6 Nissan engines of that era, and it is typically paired with multiple oxygen sensors (upstream and downstream) to monitor performance on each bank.
- Two catalytic converters, one on each bank of the V6.
Conclusion: On the V6-equipped Xterra, expect two catalytic converters in the exhaust system, with sensors positioned to monitor emissions from both banks.
KA24DE 2.4 L I4 configuration
For those Xterras equipped with the 2.4 L four-cylinder engine, the arrangement is typically a single catalytic converter along the exhaust path, located downstream of the exhaust manifold and before the resonator or muffler depending on the exact layout.
- Typically one catalytic converter.
Conclusion: The four-cylinder version usually has a single catalytic converter, making the total count different from the V6 setup.
Location and identification
Identifying the number of converters on your specific vehicle is straightforward once you inspect the exhaust path, or by checking the service diagrams for your VIN. Here are general cues to help you identify the setup:
- V6 VG33E: Look for two separate converters along the exhaust line, often each positioned near its respective bank under the engine area.
- KA24DE I4: Look for a single converter located along the exhaust path after the manifold and before the downstream components.
Conclusion: If you’re unsure which engine your 2001 Xterra has, consult the VIN-specific service manual or a Nissan parts catalog to confirm the exact number and placement of catalytic converters.
Summary
In short, the 2001 Nissan Xterra’s catalytic converter count typically depends on the engine type: two converters for the 3.3 L V6 (one per bank) and one converter for the 2.4 L four-cylinder. Always verify with vehicle documentation or a professional inspection for your specific VIN.