Nissan Maxima Power Steering Pump Guide: 2016-2021
Experiencing whining noises or stiff steering in your Maxima? Here’s what you need to know about your power steering pump.
- The 2016-2021 Maxima uses a complex Electro-Hydraulic (EHPS) pump, not a simple belt-driven one.
- Whining noises when turning and stiff steering are the most common symptoms of failure.
- OEM pumps are very expensive; aftermarket brands like Mapco offer a significant cost saving but are considered economy-tier.
- Always use genuine Nissan E-PSF fluid to avoid damaging the system.
Understanding Your Maxima's Power Steering System
If you're driving a 2016 to 2021 Nissan Maxima, your car is equipped with an Electro-Hydraulic Power Steering (EHPS) pump. This isn't a simple belt-driven pump like in older cars. It's a more complex unit with its own electric motor and control module. This module adjusts steering assistance based on your speed and how you turn the wheel, using hydraulic fluid to do the heavy lifting. While efficient, this system has both electrical and hydraulic components that can fail.
Common Symptoms of a Failing Power Steering Pump
A failing EHPS pump in your Maxima will give you clear warning signs. Paying attention to these can help you diagnose the problem before it gets worse.
- Whining or Groaning Noises: The most common symptom is a whining sound that gets louder when you turn the steering wheel, especially at low speeds. 🎬 Listen to what a failing power steering pump sounds like. This often points to air in the system or the pump motor working too hard.
- Stiff Steering: The steering wheel may suddenly become very difficult to turn. This can happen intermittently or all the time, and is most noticeable when parking or driving slowly.
- Fluid Leaks: While less common than on older hydraulic systems, leaks can still occur. You might notice drips of power steering fluid under the front passenger side of your car.
- Warning Lights: A failure in the EHPS system can trigger the power steering warning light on your dashboard. 🎬 Watch this diagnostic guide for troubleshooting power steering warning lights. In some cases, electrical issues can also cause other lights like traction control or the battery light to come on.
Known Issues & Recalls
While there are no specific recalls for the power steering pump on the 2016-2021 Maxima, some owners have reported failures. One owner on a forum was told by a dealership that a failing steering rack contaminated the fluid, leading to pump failure. There was a significant recall (NHTSA Campaign: 18V601000) for 2016-2017 Maximas concerning a leaking ABS actuator pump seal, which could pose a fire risk, but this is unrelated to the power steering system.
Choosing a Replacement Pump: OEM vs. Aftermarket
When it's time to replace your pump, you have a few options. Each has its pros and cons, especially when it comes to cost and quality.
- OEM (Original Equipment Manufacturer): A new OEM pump from Nissan is the most expensive option, with prices often exceeding $1,400 for the part alone. It guarantees perfect fitment and quality but comes at a premium.
- New Aftermarket: Brands like Mapco offer new aftermarket pumps at a much lower price. Mapco is a German company known for producing budget-friendly parts. While they claim some parts meet or exceed OEM specifications, they are generally considered an economy-tier brand. For a complex part like an EHPS pump, an economy aftermarket part saves a lot of money but may carry a higher risk of premature failure compared to OEM.
- Remanufactured & Used: Remanufactured pumps are rebuilt original units and can be a good middle ground. Used OEM pumps are the cheapest but come with risks associated with their age and mileage.
A Note on Mapco Brand Quality
Reviews for Mapco parts across different categories like brakes and suspension are often mixed, with many users noting they are a good value for the price. While there are no specific, widely available reviews for their Maxima EHPS pump, the brand is generally seen as a cost-effective alternative to premium or OEM parts.
Cost of Replacing a 2016-2021 Maxima Power Steering Pump
The total cost depends heavily on the part you choose and labor rates in your area. The job is moderately difficult and typically takes a professional mechanic a couple of hours.
| Part/Service | Estimated Cost |
|---|---|
| Shop Labor | $144 - $211 |
| New OEM Part | $1,178 - $1,470 |
| New Aftermarket Part (e.g., Mapco) | $759.15 |
| Used OEM Part | $150 - $300 |
| Total Professional Replacement (Aftermarket) | ~$900 - $970 |
| Total Professional Replacement (OEM) | ~$1,322 - $1,681 |
Frequently Asked Questions
Can I replace the power steering pump myself?
This is a moderately difficult job for a DIY mechanic. The pump is located on the passenger side of the engine, and access requires removing the wheel and wheel well liner. You will need to drain hydraulic fluid, disconnect high-pressure lines, and handle electrical connectors. If you are not experienced with this type of work, professional installation is recommended.
What kind of fluid does my Maxima's power steering system use?
Always use genuine NISSAN E-PSF (Electric Power Steering Fluid) or an equivalent fluid that meets Nissan's specifications. Using the wrong fluid can damage the pump and other system components.
Is a whining noise always a bad pump?
Not always, but it's the most common sign. The noise can also be caused by low fluid levels or air in the hydraulic lines. It's important to check the fluid level in the reservoir first. If the level is good but the noise persists, the pump is the likely culprit.
🎬 See how to check your fluid levels and other essentials.Do I need to replace the steering rack at the same time?
Not usually. However, if the steering rack is leaking, it can contaminate the fluid and cause the new pump to fail prematurely. A mechanic should inspect the entire system for leaks before replacing just the pump.
Helpful Videos
Technical Specifications
OEM Part Numbers: 49110-4RA0A 49110-4RA5A
System Type: Electro-Hydraulic Power Steering (EHPS)
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Nissan Maxima:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Understanding Your Maxima's Power Steering System
- Common Symptoms of a Failing Power Steering Pump
- Known Issues & Recalls
- Choosing a Replacement Pump: OEM vs. Aftermarket
- A Note on Mapco Brand Quality
- Cost of Replacing a 2016-2021 Maxima Power Steering Pump
- Frequently Asked Questions
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