The starter on an Acura TSX is mounted to the transmission bellhousing on the passenger side of the engine bay, near the bottom, and is typically accessed from underneath the car after removing the undertray. This small electric motor engages the flywheel to crank the engine when you start the vehicle.
Location overview
The TSX uses a transverse front‑engine layout. In this configuration, the starter is bolted to the bellhousing where the engine and transmission meet, on the passenger side of the engine bay. It sits low in the bay, often near the exhaust manifold, and is most easily reached from beneath the car once the protective splash shield is removed.
Visual cues to identify the starter
Use these cues to confirm you’re looking at the starter rather than a neighboring component:
- Small, cylindrical motor with a solenoid mounted on or near it
- Bolted to the bellhousing (the engine-transmission junction)
- Two electrical connections: a thick main power cable and a thinner signal lead
- Located low in the engine bay on the passenger side, near the firewall
In practice, these signs help differentiate the starter from the alternator or other nearby devices.
Access and replacement considerations
To work on the starter, most TSX owners begin by gaining access from underneath the vehicle. Removing the front splash shield or undertray is common, which exposes the lower engine area and makes unbolting the starter feasible without extensive disassembly.
Recommended steps for locating and replacing the starter
The following steps outline a typical replacement workflow:
- Park on a level surface, engage the parking brake, and disconnect the negative battery cable
- Raise the car and remove the undertray/splash shield to access the lower engine area
- Locate the starter on the bellhousing, on the passenger side near the exhaust manifold
- Disconnect the main power cable and the smaller solenoid wire from the starter
- Unbolt the starter from the bellhousing and carefully remove it from beneath the car
- Install the new starter, torque the bolts to specification, reconnect wiring, and test the system
Note: Depending on the exact year and trim, there may be slight variations in bolt pattern or wiring color, so consult the service manual for your VIN if you’re unsure.
Gen-specific notes
Across the Acura TSX production span (2004–2014), the starter location remains consistent: mounted to the transmission bellhousing on the passenger side, low in the engine bay. Generational differences (K24A2 vs. K24Z3) are mostly related to engine mounts and accessory layout rather than starter placement. When in doubt, verify with the factory service manual or a reliable repair guide for your specific vehicle.
Summary
In short, the starter on an Acura TSX is attached to the transmission bellhousing on the passenger side of the engine bay, near the bottom and close to the firewall. Access typically requires removing the undertray and working from beneath the car. This setup is consistent across TSX engines from 2004 to 2014, with minor generation-specific variations.