INFINITI 140036P603 Lower Engine Motor Intake Manifold 329-59428A Q45 4.1L

( Country Of Origin: Japan ), ( Mounting Style: Bolt-on, Screw-on ), ( Color: Silver ), ( Manufacturer Part Number: 140036P603 ), ( Cylinder Head Type: In-line Cross-flow ), ( Material: Cast Iron ), ( Vintage Part: No ), ( Placement On Vehicle: Front, Lower ), ( Fuel Type: Gasoline ), ( Type: Intake Manifold ), ( Ipn: 329-59428a ), ( Features: Easy Installation )

Review INFINITI Q45 4.1l Engine Motor Lower Intake Manifold Oem fits 1999–2000

Introducing the Infiniti 140036P603, a top-tier OEM (Original Equipment Manufacturer) part designed specifically for the 1999 and 2000 Infiniti Q45 models with the 4.1L engine. This component is the motor lower intake manifold, an essential part of your vehicle's engine system responsible for delivering air and fuel mixture to the engine's cylinders.

The Infiniti 140036P603 is a meticulously crafted piece of automotive engineering. Its design emphasizes durability and precision, ensuring a perfect fit and seamless integration with your vehicle. It is manufactured using high-quality materials that meet or exceed OEM specifications, ensuring optimal engine performance and longevity.

This intake manifold features a sophisticated design with a smooth, flowing shape that minimizes turbulence in the air and fuel mixture as it enters the engine. Its ports are precisely machined to ensure accurate fuel delivery to each cylinder, contributing to improved combustion efficiency and reduced emissions.

The Infiniti 140036P603 also boasts a robust construction. Its cast aluminum design provides both strength and lightweight properties, making it an ideal choice for high-performance engines like the one found in the Infiniti Q45. Additionally, it is equipped with gaskets that ensure a leak-free seal between the manifold and the engine, preventing any loss of power or fuel.

When it comes to installation, you can trust that the Infiniti 140036P603 is a hassle-free choice. Its OEM design ensures that it fits perfectly in your vehicle, eliminating the need for any modifications. Moreover, it comes complete with all necessary hardware, making the installation process straightforward and efficient.

In summary, the Infiniti 140036P603 motor lower intake manifold is an essential upgrade for any 1999 or 2000 Infiniti Q45 with a 4.1L engine. Its focus on precision, durability, and performance makes it a top choice for those seeking to optimize their engine's power and efficiency. With its OEM design, easy installation, and high-quality materials, the Infiniti 140036P603 is an investment in the longevity and optimal performance of your Infiniti Q45.

Pros and Cons of Buying an Infiniti 14036P603 Lower Intake Manifold for a 1999-2000 Q45 with a 4.1L Engine

a. Improved Performance: A new manifold can help increase engine performance by ensuring a proper seal and optimal air/fuel mixture.

b. Better Fuel Economy: A well-functioning intake manifold can lead to better fuel efficiency, saving you money on gas in the long run.

c. Smoother Idle and Driving: A faulty intake manifold can cause rough idling and uneven power delivery, but a new one can help address these issues, resulting in a smoother driving experience.

a. Cost: Replacing an intake manifold can be a costly repair, especially for luxury vehicles like the Infiniti Q45. The price for the Infiniti 14036P603 lower intake manifold is around $1,500 to $2,000.

b. Labor Costs: The labor costs to remove and install the new manifold can add up, depending on the shop's hourly rate and the complexity of the job.

c. Potential for Damage: During the removal process, other engine components may get damaged, leading to additional repair costs.

Deciding to buy and install an Infiniti 14036P603 lower intake manifold for a 1999-2000 Q45 with a 4.1L engine involves weighing the potential benefits, such as improved performance, better fuel economy, and a smoother driving experience, against the costs, which include the price of the manifold itself, labor costs, and the risk of additional damage. Ultimately, if the manifold is the root cause of your vehicle's issues, and you want to restore its performance and enjoy the long-term benefits, then investing in a new one may be worthwhile.

Before making a decision, it's essential to consider the overall condition of your car, your personal driving habits, and your budget. If you're experiencing significant performance issues or notice a rough idle, a faulty intake manifold could be the culprit. In that case, it might be wise to invest in a new one. However, if your car runs well and the cost of the repair outweighs the potential benefits, it may be best to hold off on the purchase. Regular maintenance and timely repairs of other components can help prevent larger, more expensive issues down the line.

Details:

Part came out of: 1999 Infiniti Q45, Stock Number: 65920, OEM 140036P603, By: MO, 140036P603.

part #: 140036p603 prices

• $39.99-$47.49

specifications inputmanifolds:

• for makes: Infiniti
• for years: 1999-2000
• country of origin: Japan
• mounting style: Bolt-on, Screw-on
• color: Silver
• manufacturer part number: 140036P603
• cylinder head type: In-line Cross-flow
• material: Cast Iron
• vintage part: No
• placement on vehicle: Front, Lower
• fuel type: Gasoline
• type: Intake Manifold
• interchange part number: 329-59428A
• features: Easy Installation

payments inputmanifolds:

• wallet: Paypal
• other
• credit card: Diners-club

general inputmanifolds:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Intake Manifolds

offer inputmanifolds:

• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 9, 2026
• availability: In Stock

returns inputmanifolds:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

shipping inputmanifolds:

• cost: $49.99
• service: Economy, UPS Ground
• type: Fixed
• class: Economy, Standard
• carrier: UPS
• transit: 2-6 Days

seller inputmanifolds:

• # reviews: 15424
• rating: 99.7%
• city: Houston, Texas

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