2013-2018 Nissan Altima Intake Resonator: Fixing Engine Drone and Whistling Noises
This guide explains the function, failure symptoms, and replacement of the engine air intake resonator for the 2013-2018 Nissan Altima.
- The primary function of this part is to reduce engine intake noise; failure results in a loud drone or whistle.
- This is not an emissions part and a failure will not cause you to fail an emissions test.
- A large crack can cause a vacuum leak, potentially leading to a rough idle and a P0171 check engine code.
- Replacement is very simple, requiring only basic hand tools and about 30 minutes, making it an easy DIY repair.
Symptoms of a Failing Intake Resonator
When the air intake resonator fails, the symptoms are almost always noise-related. Because it is made of plastic, it can become brittle over time and crack, or the seams can separate.
Loud Engine Drone or Hum
The most common symptom is a noticeable increase in engine noise, particularly a loud humming, buzzing, or droning sound that gets louder with acceleration. This is the sound the resonator is designed to suppress. If the part is cracked, broken, or missing, the intake noise will no longer be muffled.
Whistling or Sucking Sounds
A crack or break in the resonator can create a vacuum leak. This often results in a distinct whistling or sucking sound coming from the engine bay, which may be most noticeable at idle or when accelerating.
Check Engine Light (Rare)
While uncommon, a significant crack or break in the resonator can cause a large enough vacuum leak to disrupt the engine's air-fuel mixture. This unmetered air enters the engine after the Mass Airflow (MAF) sensor. The engine's computer may detect a lean condition and trigger a Check Engine Light with codes like P0171 (System Too Lean Bank 1). This is usually accompanied by other symptoms like a rough idle or hesitation.
Known Issues, TSBs, and Recalls
For the 2013-2018 Nissan Altima, there are no specific recalls or widespread Technical Service Bulletins (TSBs) directly related to the engine air intake resonator. Failures are typically due to age-related plastic degradation, physical impact from road debris, or damage during unrelated engine service. The most prominent recalls for this Altima generation concern the secondary hood latch, CVT transmission issues, and airbag sensors.
Pro Tip: Many owners report rattling noises from the passenger side of the engine bay. While this can be a loose or broken intake resonator, it is also a very common symptom of a failed passenger-side engine mount. If you hear a rattling or knocking, especially when putting the car in gear, be sure to inspect the engine mount as well.
Buying a Used 2013-2018 Altima Intake Resonator
A used OEM resonator is an excellent, cost-effective alternative to a new part. Since this part is not subject to internal wear and its function is purely acoustic, a good-condition used part will perform identically to a new one. Aftermarket versions can sometimes have fitment issues or be made from lower-quality plastic that doesn't dampen sound as effectively.
What to Inspect on a Used Part:
- Check for Cracks: Carefully inspect the entire body of the resonator, paying close attention to the seams where the plastic halves are joined and around the mounting tabs. Even a hairline crack can cause noise issues.
- Verify Mounting Points: Ensure all mounting tabs and bolt holes are intact and free of cracks. These are common failure points and are critical for securing the part and preventing rattles.
- Inspect Connection Ports: Check the inlet and outlet ports to ensure they are round and not deformed. A warped connection point can prevent a proper seal with the rest of the intake tubing.
- Check for Internal Debris: Shake the part gently. You should not hear anything rattling inside. Debris from a previous engine failure or from being stored improperly could get sucked into your engine.
Cost Comparison
Replacing a cracked or broken intake resonator is relatively inexpensive. The part itself is the main cost, as labor is minimal.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Nissan) | $55 - $85 |
| New Aftermarket | $30 - $60 |
| Used OEM | $20 - $45 |
| Shop Labor | $50 - $100 |
DIY Replacement Guide
Replacing the engine air intake resonator on a 2013-2018 Nissan Altima is a simple job that most DIY mechanics can complete in under 30 minutes with basic hand tools.
- Locate the Resonator: The resonator is part of the black plastic air intake ducting located between the air filter box and the engine's throttle body. The specific part for this guide, 16576-3TA0C, is the upper duct assembly that includes the resonator chamber.
- Loosen Clamps: Use a flathead screwdriver or an 8mm socket to loosen the hose clamps securing the resonator assembly to the air filter housing and the throttle body.
- Remove Mounting Bolts: The assembly is typically held to the engine or surrounding brackets by one or two 10mm bolts. Remove these bolts.
- Remove the Old Part: Gently wiggle and pull the resonator assembly off the air filter housing and the throttle body. You may need to disconnect a small breather hose.
- Install the New Part: Installation is the reverse of removal. Slide the new resonator assembly onto the throttle body and air filter housing. Tighten the mounting bolts first, then tighten the hose clamps. Reconnect any breather hoses.
Warning: When the intake duct is removed, cover the opening of the throttle body with a clean rag to prevent any dirt, debris, or tools from falling into the engine.
Frequently Asked Questions (FAQ)
Can I just remove the intake resonator and not replace it?
Yes, you can physically remove the resonator and replace it with a straight pipe, which is a common modification known as a 'resonator delete'. However, this will significantly increase intake noise, resulting in a loud drone under acceleration. It offers no significant performance benefit on a stock engine.
Is the engine air intake resonator an emissions part?
No, it is not an emissions control device. Its sole purpose is to reduce intake noise. A broken or missing resonator will not cause your vehicle to fail an emissions inspection.
Will a bad intake resonator cause my car to run poorly?
Generally, no. The primary symptom is noise. However, if the resonator is severely cracked or broken, it can create a vacuum leak that might lead to a rough idle, hesitation, or a lean-condition Check Engine Light (P0171).
What is the difference between an intake resonator and an exhaust resonator?
They perform a similar function but on different systems. The intake resonator quiets the sound of air being sucked into the engine. An exhaust resonator, located in the exhaust system, quiets the sound of exhaust gases leaving the engine.
Technical Specifications
OEM Part Numbers: 16576-3TA0A 16576-3TA0B 16576-3TA0C
Material: Molded Plastic
We Have This Part in Stock
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 Altima:
- 🛍️ Shop This Part
- Symptoms of a Failing Intake Resonator
- Loud Engine Drone or Hum
- Whistling or Sucking Sounds
- Check Engine Light (Rare)
- Known Issues, TSBs, and Recalls
- Buying a Used 2013-2018 Altima Intake Resonator
- What to Inspect on a Used Part:
- Cost Comparison
- DIY Replacement Guide
- Frequently Asked Questions (FAQ)
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