2016 Nissan Frontier: Serpentine Belt Replacement Guide

Quick Answer: 2016 Nissan Frontier Serpentine Belt Part Numbers

It is critical to identify your engine before purchasing parts. The 2016 Frontier was available with either a 2.5L 4-cylinder or a 4.0L V6 engine, and they use different belts and components.

For the 2.5L 4-Cylinder Engine (QR25DE):

• Belt Length: Approximately 2100mm
• Rib Count: 7-rib
• OEM Belt Part Number: Nissan 11720-EA200
• Aftermarket Belt Cross-References: Gates K070827, Dayco 5070825, Continental 4070827
• Automatic Belt Tensioner Part Number: Nissan 11955-JA00B
• Idler Pulley Part Number: Nissan 11927-EA00A

For the 4.0L V6 Engine (VQ40DE):

• Belt Length: Approximately 2260mm
• Rib Count: 7-rib
• OEM Belt Part Number: Nissan 11720-EA20B
• Aftermarket Belt Cross-References: Gates K070890, Dayco 5070890, Continental 4070890
• Automatic Belt Tensioner Part Number: Nissan 11955-EA20D
• Idler Pulley Part Number: Nissan 11925-EA20A

Belt Routing

Properly routing the serpentine belt is crucial for the function of your engine's accessories. An incorrectly routed belt can cause damage and leave you stranded. Before you remove the old belt, always take a clear photograph or draw a diagram of the existing belt path. There should also be a routing diagram on a sticker in the engine bay, often on the radiator support or fan shroud.

While the exact pulley locations differ slightly between the 2.5L and 4.0L engines, the general path is similar. The belt snakes around all engine-driven accessories, which are powered by the crankshaft pulley.

A common routing order is as follows:

1. Starts at the Crankshaft Pulley (the largest, lowest pulley).
2. Wraps around the Air Conditioning (A/C) Compressor.
3. Goes over the smooth Idler Pulley.
4. Travels up to the Alternator.
5. Comes down to the Power Steering Pump.
6. Goes around the Water Pump.
7. Finally, it routes around the Tensioner Pulley before returning to the crankshaft, completing the loop.

The tensioner pulley is the key to removal and installation. It is spring-loaded to maintain correct belt tension and has a specific spot to attach a tool to relieve that tension.

How to Replace the Serpentine Belt

Replacing the serpentine belt on a 2016 Nissan Frontier is a manageable task for a DIYer with the right tools. The primary tool you will need is a serpentine belt tool, which is a long, thin ratchet with various socket and crowfoot attachments. A standard 3/8" or 1/2" drive breaker bar can also work, but clearance might be tight.

1. Safety First: Ensure the engine is cool. Disconnect the negative battery terminal for safety.
2. Locate the Tensioner: Find the automatic belt tensioner. It's an assembly with a pulley that is pressed against the belt. You will see a square 3/8" or 1/2" drive hole or a raised hex nut on the body of the tensioner.
3. Relieve Tension: Attach your serpentine belt tool or breaker bar to the tensioner. Rotate the tensioner against its spring pressure. This will loosen the belt enough for you to slip it off one of the pulleys (the highest, smoothest pulley, like the idler or alternator, is often easiest).
4. Remove the Old Belt: Carefully unthread the old belt from all the pulleys.
5. Check Pulleys: With the belt off, spin each pulley by hand (except the crankshaft). They should spin smoothly and quietly. If any pulley feels rough, wobbles, or makes a grinding noise, it should be replaced along with the belt.
6. Install the New Belt: Using your photo or diagram, carefully route the new belt around all pulleys, leaving one smooth pulley for last. Double-check that the ribbed side of the belt is seated correctly in the grooves of every ribbed pulley.
7. Apply Tension: Rotate the tensioner again, and carefully slide the belt onto the final pulley. Once it's on, slowly release the tensioner, ensuring the belt stays seated in all the pulley grooves. Visually inspect the full path one last time.
8. Final Steps: Reconnect the battery terminal. Start the engine and let it run for about 30 seconds to ensure the belt is tracking correctly, then shut it off and re-check.

Replacement Interval

Nissan does not specify a strict mileage interval for serpentine belt replacement in the service schedule. Instead, it is recommended to "inspect" the drive belts at regular service intervals (every 5,000 to 7,500 miles). As a general rule of thumb, most technicians recommend replacing the serpentine belt every 60,000 to 90,000 miles, or sooner if signs of wear are visible.

Signs of a Failing Belt or Tensioner

Your belt and its tensioner provide clear warning signs before a complete failure. Ignoring them can lead to a breakdown, as the belt powers the alternator (charging system), water pump (cooling system), and power steering.

• Squealing or Chirping Noises: This is the most common symptom, often worse on cold starts or during sharp turns. It indicates the belt is slipping.
• Visible Wear: Inspect the belt for cracks, glazing (shiny surface), fraying, or missing ribs. Any visible damage means the belt is due for replacement.
• Tensioner Noise: A rumbling or grinding noise coming from the tensioner pulley indicates a failing bearing.
• "Chattering" Noise at Idle: A rapid ticking or chattering noise can be caused by a weak tensioner spring, allowing the belt to vibrate.
• Accessory Malfunctions: Dimming headlights (alternator), difficulty steering (power steering), or engine overheating (water pump) can all be caused by a slipping or broken belt.

If you notice any of these signs, a thorough inspection is warranted.

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