How many catalytic converters does a 2008 Acura MDX have?
Two catalytic converters.
The 2008 Acura MDX with the 3.5-liter V6 typically uses a dual-cat configuration, with one catalytic converter on each bank of the engine. This setup is common for V6 models to effectively reduce emissions from both sides of the engine before the exhaust gases merge and continue through the rest of the exhaust system.
Understanding the MDX exhaust layout
For most 2008 MDX models powered by the 3.5L V6, the exhaust system is arranged to treat emissions on a per-bank basis. Each bank has its own catalytic converter located near the corresponding exhaust manifold, and the gases from both sides are then routed through downstream components such as a resonator and muffler.
Key aspects of this dual-cat arrangement help clarify what you might inspect or replace during maintenance.
- One catalytic converter per bank (left and right) of the V6 engine.
- Converters are typically positioned close to their respective exhaust manifolds on each side of the engine bay.
- The two converters feed into the rest of the exhaust system, which may include a resonator and a single rear muffler.
- Emissions monitoring relies on O2 sensors placed before and after each catalytic converter.
In short, the MDX’s standard dual-cat setup means there are two catalytic converters, one for each bank of the V6 engine.
Maintenance and replacement considerations
When planning servicing or replacement, it’s important to understand how a dual-cat system affects maintenance, emissions compliance, and inspection requirements. Maintenance decisions should consider both converters together, as issues with one bank can influence overall exhaust performance and ECU readings.
- If replacing cats, verify that both banks are addressed to maintain proper emissions performance.
- Inspect associated O2 sensors and wiring on each bank, as sensor failures can mimic catalytic problems.
- Check for exhaust leaks around the manifolds and converters, which can affect sensor readings and performance.
Because the catalytic converters play a crucial role in emissions control, always follow OEM guidance and consult a qualified technician when diagnosing or replacing components.
Summary
The 2008 Acura MDX with a 3.5-liter V6 uses two catalytic converters—one on each bank of the engine. This dual-cat configuration is typical for V6 Acura/Honda models of that era and is followed by downstream exhaust components and sensors to monitor and control emissions. Regular inspection of both banks and associated sensors helps ensure optimal performance and compliance.
