What is the power steering problem in the 2004 TSX?

In brief, the core issue reported for the 2004 TSX is a loss of power steering assist caused by problems in the hydraulic steering system, commonly stemming from a failing pump, leaks in the rack or hoses, or air in the fluid. This can make steering feel heavy or unresponsive, especially at low speeds.

What the 2004 TSX power steering system is: a quick overview

The 2004 Acura TSX uses a hydraulic power steering system driven by a belt-connected pump. The pump circulates steering fluid to a rack-and-pinion setup to provide assist at lower speeds. When parts wear or leak, or when air enters the system, the level of steering assist can drop, making the wheel harder to turn and potentially affecting handling safety.

Common causes of power steering problems

There are several frequent culprits behind power steering trouble in the TSX, most of which involve worn components or leaks. Understanding these helps owners diagnose and prioritize repairs.

• Leaking power steering rack seals, hoses, or connections


• A failing or worn power steering pump


• Low power steering fluid due to gradual leaks or evaporation


• Air trapped in the hydraulic system from a leak or after refilling



• Reservoir problems, such as a cap leak or improper resealing after maintenance

Diagnosing the exact cause usually requires a visual inspection for leaks, a check of fluid level and condition, belt inspection, and sometimes a pressure test of the hydraulic circuit. Timely service can prevent further wear on internal components.

Common symptoms to watch for

Owners typically notice a handful of telltale signs when the power steering system is failing or failing intermittently. Being aware of these can prompt earlier inspection and repair.

• Stiff or heavy steering effort at low speeds or when maneuvering in parking lots


• Whining, groaning, or squealing noises coming from the front of the vehicle when turning


• Visible fluid leaks under the engine bay or pooling near the steering rack


• Warning light on the dash indicating power steering or steering system trouble


• High steering effort that improves temporarily after the engine is shut off and restarted (inconsistent performance)

If you notice any of these symptoms, especially combined fluid leaks and a warning light, it's wise to have the system inspected promptly to avoid potential damage to the rack or pump.

What to do if you suspect a problem

Initial checks you can perform

Before taking the car to a shop, these quick checks can help you gather information for the technician and determine urgency.

• Check power steering fluid level and look for signs of leaks around the rack, hoses, and pump


• Inspect the drive belt for cracks, wear, or looseness that could affect the pump


• Look for the power steering warning light on the dash and note when it illuminates


• Review service history for prior PS work and check for any recalls or service bulletins related to the PS system

These checks can help you describe the issue clearly to a technician and may reveal obvious leaks or belt problems that can be addressed quickly.

Recommended repair path and likely replacements

If a professional diagnosis confirms a hydraulic PS problem, repairs typically fall into a few categories depending on root cause and the device’s condition. The following are common outcomes, listed to provide a sense of what repair may entail.

• Replacing the power steering pump if it is noisy or failing to build pressure


• Replacing or refurbishing the power steering rack and pinion if seals are leaking or internals are worn


• Replacing damaged high- or low-pressure hoses and any related fittings


• Replacing the drive belt or tensioner if belt-related drive issues are contributing to pump failure


• Bleeding the system and refilling with the correct hydraulic power steering fluid

Because hydraulic PS systems are interconnected, the specific repair depends on diagnosing the exact source of failure. A qualified mechanic can confirm the necessary parts and provide an estimated cost range.

Recalls, service bullets, and what to check now

Given the age of the vehicle, it’s important to check for any recalls or service bulletins that may affect the power steering system. Owners should:

• Check the National Highway Traffic Safety Administration (NHTSA) database for recalls by VIN


• Ask the Acura dealer about any Safety/Service Bulletins related to the TSX’s PS system


• Verify that any used part replacements come with proper warranties and compatible specifications for the TSX

Because recalls and bulletins can vary by production date and region, a dealer or certified shop is the most reliable source for confirming applicable notices and required actions.

Summary

The power steering issue in the 2004 TSX centers on the hydraulic steering system, with common failure modes including leaks in the rack or hoses, a failing pump, and air in the system. Symptoms often include heavy steering, audible pump noise, and warning lights. Diagnosis by a qualified technician is essential to determine whether the fix is a pump, rack, hoses, or belt replacement, followed by proper bleeding and refilling of fluid. Owners should also verify any recalls or service bulletins related to the PS system and address problems promptly to maintain safe steering performance.

How much would it cost to replace an Acura TSX 2004 power steering system?

The average cost for an Acura TSX Power Steering Pump Replacement is between $1,995 and $2,052. Labor costs are estimated between $122 and $179 while parts are typically priced around $1,873. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.

What is the most common cause of power steering failure?

The most common causes of power steering failure are leaks in the power steering fluid and a worn or slipping drive belt. A leak can lead to low fluid levels, causing the system to lose pressure and potentially damage the pump, while a bad belt can prevent the pump from operating correctly. 
Leaking power steering fluid 

• Cause: Leaks are often caused by worn-out seals, cracked hoses, loose hose couplings, or a bad pump. 
• Effect: A low fluid level means the system can't build enough pressure to assist with steering, making the wheel stiff. 
• Related problem: A low fluid level can eventually cause the power steering pump to overheat and fail completely because it has to pump air instead of fluid. 

Worn or slipping drive belt 

• Cause: The belt that drives the power steering pump can become worn, cracked, or simply loose over time.
• Effect: A slipping belt will cause a loss of steering assist, often accompanied by a squealing noise, especially when turning.
• Related problem: If the belt is damaged, it may need to be replaced. If it is just loose, it can be adjusted, but if it slips too much, it can cause further damage. 

Other common causes

• Worn steering pump: The internal components of the pump can wear out over time, reducing its ability to pressurize the fluid. 
• Contaminated or old fluid: Old fluid loses its lubricating properties and can clog up the system, increasing wear and tear on components. 
• Air in the system: Air can get into the system if there is a leak, disrupting hydraulic pressure. 
• Mechanical wear and tear: General wear and tear on any part of the system can eventually lead to failure. 

What is the most common Acura TSX problem?

US News & World Report ranked the Acura TSX as second out of 18 other luxury midsize vehicles. Some common problems of the Acura TSX include power steering failure, faulty tire pressure sensors, and brake problems.

How do I reset my electric power steering?

To reset electric power steering, turn off the engine, then turn it on and center the steering wheel before turning the wheel lock-to-lock (fully right, then fully left). After returning the wheel to the center, turn the car off and on again to complete the initialization. This procedure, often called a lock-to-lock reset, can correct issues that occur after a battery disconnection or power disruption. 
Lock-to-lock steering wheel reset 
This video demonstrates the lock-to-lock steering wheel reset procedure: 54sMoparYouTube · Jan 8, 2025

1. Turn off the engine. Make sure the ignition is off. 
2. Start the engine: and let it idle. 
3. Center the steering wheel. Ensure the wheels are pointing straight ahead. 
4. Turn the steering wheel fully to the right. Hold it there for about 5 seconds. 
5. Turn the steering wheel fully to the left. Hold it there for about 5 seconds. 
6. Return the steering wheel to the center. Make sure it is straight again. 
7. Turn the ignition off. Wait for all the dashboard lights to turn off. 
8. Restart the engine. The steering wheel should now be initialized. 

Other potential causes and solutions

• Check the battery: A weak or failing battery can trigger the power steering warning light. Check the battery's charge and ensure the terminals are clean and tight. 
• Use an OBD-II scanner: If the reset doesn't work, a scanner can help identify specific diagnostic trouble codes (DTCs) related to the steering angle sensor or other components. 
• Consult a professional: If the light persists or you suspect a more serious issue, such as a faulty sensor or wiring problem, a professional mechanic can provide a more thorough diagnosis and repair.