Yes. The Acura TSX uses a 2.4-liter Honda K-series inline-4 engine in all US-spec models.
Across its two generations, the TSX relies on variations of the K-series 2.4L engine. The exact engine code changes by year (K24A family in the first generation, and K24Z variants in the later models), but the displacement and overall K-series architecture remain consistent.
Engine lineage by generation
The following breakdown identifies the general engine family used by each TSX generation.
- First-generation TSX (2004–2008): 2.4-liter K-series inline-4 with i-VTEC, commonly associated with the K24A family. This generation produced roughly 200 horsepower, depending on model year and market.
- Second-generation TSX (2009–2014): 2.4-liter i-VTEC again, with variants in the K24Z family (K24Z1/K24Z3 depending on market). Power remained in the 200-horsepower range, with minor tuning differences by model year.
The TSX does not depart from the K-series 2.4L engine lineup across these years; the engine code shifts reflect production and market differences, not a change in displacement or core architecture.
Maintenance and parts considerations
Before planning maintenance or part replacements, note that the engine is essentially a K-series 2.4L, but exact component compatibility depends on the specific engine code.
- Timing chain and guides: K24 engines use a timing chain; regular inspection and replacement of tensioners or guides may be required as they age.
- Water pump and ancillary belts: plan for water pump replacement as part of major service intervals to prevent overheating.
- Oil and filters: use the recommended viscosity (often 0W-20 synthetic) and follow maintenance schedules for oil changes.
- Cross-model compatibility: many K24 components (intakes, exhaust manifolds, sensors) are shared with other Honda models from the era (Accord, CR-V, Element), but verify exact part numbers for your TSX’s engine code.
Keeping up with the proper maintenance schedule and verifying the exact engine code will help ensure the right parts and service approach for your TSX's K24 engine.
Summary
Conclusion: Yes—the Acura TSX uses a Honda K-series 2.4-liter engine across its production run. While the exact engine code varies by generation and market (K24A family in the early TSX and K24Z variants in later models), the engine displacement and K-series architecture remain consistent. This has implications for maintenance, part compatibility, and potential tuning opportunities.