A Guide to the Engine VVT Sprocket for the 2014-2018 INFINITI Q50
Understand the symptoms of a failing VVT sprocket and how to choose the right replacement for your Q50.
- Hitachi is the Original Equipment (OE) supplier, making it the most reliable aftermarket choice for your Q50.
- Replacement is a very complex and expensive job; do not use low-quality parts to avoid repeat labor costs.
- Common symptoms include a rattling engine noise, rough idle, loss of power, and Check Engine Light codes P0011 or P0021.
- Always use the correct, high-quality engine oil and change it on schedule to prolong the life of VVT components.
Is Your INFINITI Q50 VVT Sprocket Failing?
A failing Variable Valve Timing (VVT) sprocket can cause significant engine problems. Because this part is so critical to engine timing, symptoms often appear quickly and should not be ignored. Keeping up with regular oil changes using high-quality oil is the first step in preventing issues, as the entire VVT system relies on clean oil and steady pressure to function.
Common Symptoms of a Bad VVT Sprocket:
- Check Engine Light: This is often the first sign. You will likely see codes such as P0011 or P0021, which point to a problem with the camshaft timing adjustment on either Bank 1 or Bank 2. 🎬 Watch: How to diagnose and fix P0011 and P0021 codes
- Engine Rattle: A distinct rattling or ticking noise from the front of the engine, especially on startup or when changing RPMs, can indicate a problem with the sprocket or timing chain.
- Rough Idle: The engine may shake or run unevenly when the car is stopped.
- Loss of Power: Your Q50 may feel sluggish and slow to accelerate because the engine's valve timing is not being optimized for performance.
- Stalling: In severe cases, incorrect timing can cause the engine to stall, particularly at low speeds or when coming to a stop. One owner reported their engine would not start at all after the sprockets "jumped time." 🎬 See what happens when a failed sprocket prevents the engine from starting
No Known Recalls or TSBs
As of early 2026, there are no specific safety recalls or widespread Technical Service Bulletins (TSBs) from INFINITI for VVT sprocket failure on the 2014-2018 Q50. Issues are typically handled as individual repairs.
Choosing the Right Aftermarket VVT Sprocket
When replacing a VVT sprocket, the quality of the part is extremely important. The replacement is a labor-intensive job that requires accessing the engine's internal timing components. Using a low-quality part could mean doing the entire expensive job all over again. Here’s a breakdown of the available brands.
Brand Quality Tiers
- Tier 1 (OEM Supplier): Hitachi
Hitachi is the original equipment (OE) manufacturer for many of Nissan and INFINITI's engine components, including the VVT sprockets. Choosing a Hitachi aftermarket part is like buying the genuine part from the dealership without the high price tag. It is the most recommended option for reliability and perfect fit. - Tier 2 (Quality Aftermarket): Gates, Standard Ignition (SMP), Cloyes
These are established brands known for producing reliable aftermarket parts. While not the OE supplier, they engineer their components to meet or exceed original specifications. They offer a good balance of quality and value for owners looking for a dependable repair. - Tier 3 (Budget Aftermarket): Dorman
Dorman offers a budget-friendly alternative. However, for critical and high-labor components like a VVT sprocket, caution is advised. Some mechanics and vehicle owners have reported issues with the long-term durability of Dorman's more complex electronic parts compared to OEM or OE-supplier options.
Pro Tip: Replace in Pairs or as a Kit
Your Q50 has multiple VVT sprockets (typically two or four, for intake and exhaust). If one fails, especially on a higher-mileage engine, the others may not be far behind. It is also wise to replace the timing chain, tensioners, and guides at the same time, as these parts wear together. This saves you from paying for the same difficult labor twice in the near future.
VVT Sprocket Replacement Cost for 2014-2018 INFINITI Q50
The cost can vary significantly based on your Q50's engine and the parts you choose. The replacement is complex and requires many hours of labor.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Sprocket | $304.52 - $687.72 |
| New OEM Sprocket | $450 - $800+ |
| Shop Labor | $1,200 - $2,200+ |
| Total Job Cost (Aftermarket) | $1,500 - $2,900+ |
Frequently Asked Questions
Can I drive my Q50 with a bad VVT sprocket?
It is not recommended. While the car may still run, you risk severe internal engine damage if the timing chain slips or the sprocket fails completely. Driving with these symptoms can lead to a much more expensive repair.
What causes a VVT sprocket to fail?
The most common causes are high mileage and poor oil quality. The VVT system uses oil pressure to work, so infrequent oil changes or low oil levels can cause sludge to build up and wear out the delicate internal parts of the sprocket.
Is replacing a VVT sprocket a DIY job?
For most people, no. This is a very difficult and complex job rated 5 out of 5 for difficulty. It requires removing the timing cover, which involves draining fluids, removing the radiator, valve covers, oil pan, and many other components. It also requires special tools and a deep understanding of engine timing. This job is best left to an experienced mechanic.
🎬 Watch: A complete walkthrough of the complex timing chain replacementShould I replace the VVT solenoid at the same time?
It's a good idea. The VVT solenoid is the part that controls the oil flow to the sprocket. It is much easier to access and less expensive than the sprocket. Since a faulty solenoid can cause similar symptoms and the systems work together, replacing it during a sprocket job is smart preventative maintenance.
Helpful Videos
Technical Specifications
OEM Part Numbers: 13025-5CA0C 13025-5CA0B 13025-5CA0D 13025-1MR2A
Varies by engine (3.7L VQ37VHR, 3.5L VQ35HR, 2.0T, 3.0T VR30DDTT) and position (Intake/Exhaust, Left/Right Bank). Always verify the part number with your vehicle's VIN.
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.
- INFINITI Q50:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your INFINITI Q50 VVT Sprocket Failing?
- Common Symptoms of a Bad VVT Sprocket:
- No Known Recalls or TSBs
- Choosing the Right Aftermarket VVT Sprocket
- Brand Quality Tiers
- Pro Tip: Replace in Pairs or as a Kit
- VVT Sprocket Replacement Cost for 2014-2018 INFINITI Q50
- Frequently Asked Questions
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