2010-2011 Saab 9-5 Power Steering Pump: Noises, Leaks, and Why OEM Matters

Vehicle and Engine Compatibility

Symptoms of a Failing Power Steering Pump

A failing power steering pump rarely dies without warning. It will usually provide several audible and physical clues that it's in distress. Paying attention to these signs can help you diagnose the problem before you lose steering assist completely.

1. Whining or Groaning Noises

This is the most common symptom. You may hear a distinct whining, groaning, or growling sound that gets louder when you turn the steering wheel. The noise may also increase with engine RPM. This sound is typically caused by low fluid levels due to a leak, air trapped in the system, or the pump's internal components wearing out and struggling to build pressure.

2. Stiff or Heavy Steering

If turning the steering wheel suddenly requires significantly more effort, especially at low speeds or when parking, the pump is likely not providing enough hydraulic pressure. The steering may feel sluggish, heavy, or slow to respond. In severe cases, it can feel like you have no power steering at all, making the car very difficult to maneuver.

3. Fluid Leaks

Finding puddles of red or amber-colored fluid under the front of your car is a clear sign of a leak in the power steering system. The pump itself can leak from its seals or housing. While checking for leaks, also inspect the high-pressure and low-pressure hoses connected to the pump, as they can also be the source. On the 2.8L V6, the pump is located on the passenger side of the engine.

4. Squealing at Startup or During Turns

A sharp squealing noise, especially when you first start the car or make sharp turns, can point to a problem. This sound is often caused by the accessory drive belt slipping on the pump's pulley. The belt could be worn or loose, or the pump's bearing could be starting to seize, putting extra strain on the belt and causing it to slip and squeal.

5. Shuddering or Vibrating Steering Wheel

A failing pump can deliver inconsistent hydraulic pressure, causing a vibration or shudder that you can feel in the steering wheel. This might be most noticeable when the car is idling or during low-speed turns.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

As of mid-2024, there are no specific recalls or TSBs from the National Highway Traffic Safety Administration (NHTSA) for the power steering pump on the 2010-2011 Saab 9-5. However, owners and technicians have reported some key issues:

• Poor Quality of Aftermarket Pumps: Forum discussions strongly indicate that many aftermarket and remanufactured power steering pumps for this vehicle are of poor quality and prone to premature failure, sometimes immediately after installation. Users report going through multiple non-OEM pumps that quickly developed leaks. This makes sourcing a quality used OEM or new Genuine Saab part highly recommended.
• Misdiagnosis from Steering U-Joint: Some steering issues can be mistaken for a bad pump. The windscreen drain on the 9-5 platform can drip water onto the steering column's universal joint (U-joint), washing away its grease over time. This can cause corrosion and lead to progressively heavy or notchy steering, mimicking a pump failure. It is wise to inspect and lubricate this U-joint before condemning the pump.

Buying a Used Power Steering Pump: What to Look For

Given the reported issues with new aftermarket pumps, a low-mileage used OEM pump is often a reliable and cost-effective choice. Here’s how to inspect a used unit:

• Verify the Part Number: Ensure the pump is a Genuine GM/Saab part. Look for part number 13309335 or its superseded number, 13309340.
• Check for Leaks: Inspect the pump body thoroughly for any signs of fluid residue, especially around the shaft seal (behind the pulley) and where the reservoir mounts to the pump body.
• Spin the Pulley Hub: With the pulley removed, turn the input shaft by hand. It should spin smoothly with some resistance but without any grinding, roughness, or catching. Any noise or gritty feeling indicates internal bearing damage.
• Inspect the Pulley: While the pulley is often separate, if it's included, check it for cracks, chips, or warping.
• Ask About Mileage: Whenever possible, choose a pump from a vehicle with the lowest possible mileage. While these pumps can last over 100,000 miles, lower mileage reduces the risk of wear.

Cost of Replacement

The cost to replace a power steering pump can vary significantly based on the part source and labor rates. Here is a general cost comparison:

Total replacement cost at a professional repair shop typically ranges from $600 to $950, depending on the shop and parts used.

Installation and System Bleeding

Replacing the pump is a moderately difficult job that a skilled DIY mechanic can perform. The most critical part of the installation is properly bleeding the system to remove all air.

Bleeding Procedure:

1. After installing the new pump, fill the reservoir to the 'MAX' line with the correct fluid. Leave the cap off.
2. Start the engine and immediately top off the fluid to the 'MIN' mark as the level drops.
3. Slowly turn the steering wheel from full lock to full lock several times. Do not hold it at the lock position for more than a few seconds.
4. While turning the wheel, have a helper watch the fluid reservoir and keep it topped up. Watch for air bubbles.
5. Continue until no more bubbles appear in the fluid. The fluid level should be stable, and the pump should operate quietly.
6. Turn off the engine, top off the fluid to the correct level ('MAX' when hot), and install the reservoir cap.

Frequently Asked Questions