Yes. The 2009 Acura TSX uses a 2.4-liter K-series inline-four engine (a K24 variant) rather than a V6.
Across its two generations, the TSX relied on different K-series 2.4L engines. The earlier 2004–2008 models used the K24A2 variant, while the 2009–2014 refresh adopted the newer K24Z3 variant with refinements and a slight power bump. This article outlines what that means for owners and for parts compatibility.
Engine codes by generation
Below are the typical K-series 2.4L codes associated with the TSX across its main production years:
- 2004–2008 Acura TSX: K24A2
- 2009–2014 Acura TSX: K24Z3
The two codes indicate differences in components such as cylinder head design and intake/exhaust tuning, even though both are part of Honda’s broader K-series 2.4L family.
Maintenance and parts compatibility
Understanding the engine code helps with parts shopping and maintenance planning. While many 2.4L K-series components share similarities, some parts are specific to the K24A2 versus the K24Z3, especially items tied to timing chain assemblies, intake manifolds, and valve-train components. Regular oil changes with the manufacturer-recommended viscosity, attention to timing chain wear, and periodic spark plug and gasket replacements are common upkeep needs for both variants.
- Timing chain maintenance is relevant for both generations, since the K-series 2.4L engines use a chain-driven timing system.
- Oil type and interval recommendations can vary slightly by model year; verify the exact specs for your VIN.
- When replacing major components (e.g., filters, seals, or gaskets), confirm compatibility with the specific engine code on your vehicle.
In short, the 2009 TSX does use a K-series 2.4L engine, specifically the K24Z3 variant in US-market cars, which follows the earlier K24A2 found in the 2004–2008 models. Verification of the engine code on the vehicle is the best way to ensure exact parts fitment.
Summary
The 2009 Acura TSX is powered by a 2.4-liter K-series engine. The generation shift from K24A2 (2004–2008) to K24Z3 (2009–2014) reflects refinements rather than a change in displacement, meaning parts compatibility can vary between these two variants. For buyers, owners, and technicians, confirming the exact engine code is key to sourcing the correct parts and planning maintenance.