Does a 2017 Toyota Sienna have power steering fluid?
No. The 2017 Toyota Sienna uses electric power steering (EPS), so there is no hydraulic power steering fluid reservoir to check or refill.
In this article we explore what that means for maintenance, how EPS differs from traditional hydraulic steering, and what steps to take if you notice steering concerns on a 2017 Sienna.
Understanding the steering system in the 2017 Sienna
The Sienna’s 2017 model year is equipped with Electric Power Steering (EPS). Instead of a belt-driven hydraulic pump and fluid reservoir, EPS uses an electric motor and sensors to provide steer assist. This setup eliminates the routine need to monitor or replace power steering fluid, and it often translates to differences in steering feel and maintenance expectations compared with older hydraulic systems.
Before outlining the key contrasts, here is a concise comparison of the two common types of power steering systems:
- Hydraulic power steering relies on a pump driven by the engine, a fluid reservoir, hoses, and a belt-driven mechanism to provide assist. Regular maintenance typically includes checking and adding power steering fluid.
- Electric power steering uses an electric motor, sensors, and a control module to provide assist. There is no dedicated power steering fluid to monitor or replace, and most maintenance focuses on electrical connections and software updates.
- Hydraulic systems can feel heavier when fluid is low or when components wear; EPS generally offers more consistent assist and can adjust based on speed and driving conditions through software.
- Repairs for hydraulic PS may involve pumps, hoses, or racks; EPS issues are usually related to the motor, sensors, or control electronics, and sometimes require recalibration or replacement of components.
Conclusion: The 2017 Sienna’s electric-assisted steering removes the need for regular power steering fluid checks, but steering problems still require appropriate diagnostics focused on EPS components rather than fluid levels.
What to do if you notice steering issues
If you’re troubleshooting steering symptoms on a 2017 Sienna, consider these steps to identify common causes and the proper next steps:
- Check for any warning lights on the dash related to EPS or steering; note any fault codes if you have access to an OBD-II scanner.
- Observe whether steering feels heavy, sticky, or unresponsive, and whether the issue occurs at certain speeds or conditions (e.g., parking, highway driving).
- Inspect tires for proper inflation and wear, and ensure wheels are properly aligned; underinflated tires or misalignment can mimic steering problems.
- If you notice a fluid leak around the steering rack or hydraulic lines, this would be unusual for an EPS setup and warrants professional inspection, as it could indicate unrelated issues.
- When in doubt, have a qualified technician diagnose EPS components such as the steering motor, sensors (like the torque or position sensors), and the control module; software updates or part replacements may be required.
Conclusion: EPS-related problems are typically electrical or software-related; there is no routine fluid to top up, but persistent steering symptoms should be evaluated by a dealer or qualified mechanic to determine if recalibration, sensor replacement, or motor repair is needed.
Additional notes on service and maintenance
For owners of a 2017 Sienna, always refer to the official owner’s manual and official Toyota service bulletins for model-specific details. While EPS reduces some maintenance tasks, regular vehicle maintenance and periodic software updates can influence steering performance and safety.
Summary
The 2017 Toyota Sienna uses Electric Power Steering, meaning there is no hydraulic power steering fluid to check or replace. This setup relies on an electric motor and sensors rather than a fluid-filled pump, which changes maintenance and diagnostic practices. If steering feels off or a warning light appears, pursue a dealer or qualified technician diagnostic focused on EPS components and software, rather than looking for a fluid level to top up. In most cases, addressing steering concerns involves electrical diagnostics, sensor calibration, or component replacement rather than fluid maintenance.
