There are 56 car parts that start with the letter I. From Idle Air Bypass Valve to Intercooler Hose. Car parts refer to the various components that make up a vehicle, each playing a crucial role in its overall operation and performance. These parts can range from essential functional components like engines and transmissions, to auxiliary parts such as belts and hoses. The proper maintenance and timely replacement of car parts are vital for ensuring vehicle safety, efficiency, and longevity. With advancements in technology, many car parts now include electronic components, enhancing their functionality and enabling features such as automated driving systems and improved infotainment options.

An interesting fact about car parts is that many vehicles contain around 30,000 different parts, and the automotive industry is continuously evolving with new materials and technologies. For instance, lightweight composites are increasingly being used to improve fuel efficiency, while high-strength steel remains a staple for structural components due to its durability.

Here’s what each of the columns in the table means:

Function: A brief description of what the car part does within the vehicle system.

Maintenance Interval (months): The recommended time period after which the part should be inspected or replaced, measured in months.

Replacement Cost (USD): An estimate of the average monetary cost incurred when replacing the part, expressed in U.S. dollars.

Description: A detailed explanation of the car part, including its significance, materials, and placement in the car’s architecture.

Car parts That Start With I

Car parts function maintenance interval (months) replacement cost (USD)
Idle Air Bypass Valve Regulates the amount of air that bypasses the throttle body to maintain a consistent idle speed 12 $50 – $150
Idle Air Control (IAC) Valve Regulates the amount of air bypassing the throttle to maintain a consistent idle speed 12 $50 – $150
Idle Air Control Valve Regulates the amount of air bypassing the throttle body to maintain a consistent idle speed 12 $50 – $150
Idle Control Solenoid Adjusts the engine’s idle speed by controlling the airflow to the engine when the throttle is closed 12 $50 – $150
Idle Gear Idle Pulley Idle-Up Solenoid Ignition Ballast Resistor
Idle Speed Control Actuator Adjusts the engine’s idle speed by controlling the amount of air flowing into the engine 12 $50 – $150
Idle Speed Sensor Monitors the engine’s idle speed and provides feedback to the engine control unit to maintain the optimal idle speed 12 $30 – $100
Idle Speed Stepper Motor Adjusts the engine’s idle speed by controlling the airflow to the engine when the throttle is closed 12 $50 – $150
Idle Stabilizer Valve Helps maintain a consistent idle speed by controlling the air bypass around the throttle body 12 $50 – $150
Idler Arm Connects the steering linkage to the vehicle’s suspension, allowing the wheels to turn 6 $50 – $150
Ignition Cables Carry the high-voltage electrical current from the ignition coils to the spark plugs, providing the spark to ignite the air-fuel mixture 12 $30 – $100
Ignition Coil Generates high-voltage electrical current to fire the spark plugs, igniting the air-fuel mixture in the engine cylinders 12 $40 – $100
Ignition Control Module Manages the timing and firing of the ignition coils to provide the proper spark at the right time 24 150-300
Ignition Distributor Distributes the high-voltage electrical current from the ignition coil to the individual spark plugs in a specific firing order 24 $50 – $200
Ignition Harness Carries the high-voltage electrical current from the ignition coils to the individual spark plugs 12 $50 – $150
Ignition Interlock System Prevents the engine from starting if the driver’s blood alcohol level is above the legal limit 60 $100 – $500
Ignition Key Cylinder Houses the ignition switch and allows the driver to start the engine and activate the vehicle’s electrical systems 36 $50 – $200
Ignition Lock Cylinder Secures the ignition switch and prevents unauthorized access to the vehicle’s starting system. as needed 50-200
Ignition Module Controls the timing and duration of the spark sent to the ignition coils, ensuring proper engine ignition 12 $50 – $150
Ignition Resistor Limits the current flow to the ignition coils, protecting the ignition system components from damage 12 $10 – $50
Ignition Switch Allows the driver to start the engine and activate the vehicle’s electrical systems 36 $20 – $100
Ignition Switch Actuator Translates the driver’s input from the ignition key into electrical signals to start the engine and activate the vehicle’s systems 36 $50 – $200
Ignition System Relay Provides the high-voltage current from the battery to the ignition coils, enabling the engine to start and run 12 $20 – $100
Ignition Timing Sensor Monitors the position of the crankshaft and camshaft, providing data to the engine control unit for proper ignition timing 12 $50 – $150
Ignition Wiring Harness Bundles and routes the electrical wiring for the vehicle’s ignition system, including the coils and spark plugs 12 $50 – $150
Impact Sensor Detects sudden deceleration or impact, triggering the deployment of the vehicle’s airbags in the event of a collision 60 $50 – $200
In-Dash USB Charger Provides a convenient USB port to charge or power electronic devices from the vehicle’s electrical system. as needed 15-75
In-Tank Fuel Pump Submerged in the fuel tank, this pump pressurizes the fuel system and delivers fuel to the engine. 36-60 100-400
Indicator Light Bulb Powers the various warning and indicator lights on the instrument panel to alert the driver of system status 12 $5 – $20
Indicator Light Lens Covers and protects the indicator lights on the instrument panel from damage and environmental elements 60 $10 – $50
Inertia Switch Cuts off the fuel supply in the event of a collision to prevent a fire or explosion 60 $20 – $100
Injector Sprays a precise amount of fuel into the engine cylinder during each combustion cycle 24 50-150
Instrument Cluster Displays important vehicle information, such as speed, RPM, fuel level, and warning lights, to the driver 60 $100 – $500
Instrument Cluster Bezel The decorative trim that surrounds and frames the instrument cluster, providing a cohesive and stylish appearance 60 $50 – $200
Instrument Cluster Lens The transparent cover that protects the gauges and displays within the instrument panel cluster 60 $20 – $100
Instrument Panel Houses the various gauges, indicators, and controls that provide information and functionality to the driver 60 $100 – $500
Instrument Panel Bezel The decorative trim that surrounds and frames the instrument panel, providing a cohesive and stylish appearance 60 $50 – $200
Instrument Panel Cluster Houses the various gauges, indicators, and warning lights that provide information to the driver 60 $100 – $500
Instrument Panel Dimmer Module Controls the brightness of the instrument panel and dashboard lighting based on ambient light conditions 36 $50 – $200
Instrument Panel Dimmer Switch Controls the brightness of the instrument panel and dashboard lighting to improve visibility and reduce eye strain 36 $20 – $100
Instrument Panel Finisher The decorative trim that covers and enhances the appearance of the instrument panel 60 $50 – $200
Instrument Panel Gauge Lens The transparent cover that protects the individual gauges within the instrument panel cluster 60 $10 – $50
Instrument Panel Illumination Bulb The light source that illuminates the instrument panel gauges, indicators, and displays 12 $5 – $20
Instrument Panel Lens Covers and protects the instrument panel gauges and indicators from damage and environmental elements 60 $20 – $100
Instrument Panel Trim Decorative panels that surround and accent the instrument panel, providing a cohesive and aesthetically pleasing design 60 $50 – $200
Intake Air Sensor Measures the temperature and density of the air entering the engine to optimize the air-fuel mixture. 24-36 50-150
Intake Camshaft Responsible for opening the intake valves to allow the fuel-air mixture to enter the engine cylinders 48 200-500
Intake Camshaft Position Sensor Monitors the position of the intake camshaft to help the engine control unit manage ignition timing and fuel injection. 24-36 50-150
Intake Manifold Delivers the air-fuel mixture from the throttle body to the engine’s combustion chambers 48 $100 – $500
Intake Manifold Gasket Seals the connection between the intake manifold and the engine block, preventing air leaks and maintaining the proper air-fuel ratio 24 $20 – $100
Intake Valve Opens to allow the air-fuel mixture to enter the engine’s combustion chamber during the intake stroke 48 $20 – $100
Intake Valve Spring Closes the intake valve, sealing the combustion chamber and preventing backflow of the air-fuel mixture 48 $10 – $50
Intelligent Battery Sensor (IBS) Monitors the state of charge and health of the vehicle’s battery 12 50-150
Intelligent Oil Life Monitor (IOLM) Continuously monitors engine oil condition and recommends oil change intervals 12 0
Intercooler Cools the pressurized air from the turbocharger or supercharger before it enters the engine, improving efficiency and power 48 $200 – $800
Intercooler Hose Carries the pressurized air from the turbocharger or supercharger to the intercooler and then to the intake manifold 24 $50 – $200

Descriptions

Idle Air Bypass Valve
The idle air bypass valve is responsible for controlling the airflow that bypasses the throttle body, allowing the engine control unit to make precise adjustments to the idle speed, ensuring a smooth and stable engine operation when the vehicle is at a standstill.
Idle Air Control (IAC) Valve
The idle air control (IAC) valve is a critical component in the engine management system, responsible for precisely controlling the airflow that bypasses the throttle body, allowing the engine control unit to make adjustments to the idle speed and maintain a smooth, stable engine operation when the vehicle is at a standstill.
Idle Air Control Valve
The idle air control valve is responsible for managing the airflow to the engine at idle, adjusting the bypass air to maintain a smooth and consistent engine idle speed, ensuring the vehicle runs efficiently even when stopped.
Idle Control Solenoid
The idle control solenoid is an electronic component that regulates the amount of air bypassing the throttle body, allowing the engine control unit to precisely manage the idle speed and maintain a consistent, smooth engine operation when the vehicle is stopped or idling.
Idle Gear
Ignition Coil
Idle Speed Control Actuator
The idle speed control actuator is a key component in the engine management system, precisely regulating the airflow to the engine to maintain the desired idle speed, improving fuel efficiency and ensuring a smooth, stable engine operation when the vehicle is at a standstill.
Idle Speed Sensor
The idle speed sensor is an electronic component that measures the rotational speed of the engine when idling, transmitting this information to the engine control unit, which can then make adjustments to the idle air control system to maintain the desired engine speed and prevent stalling.
Idle Speed Stepper Motor
The idle speed stepper motor is an electronically controlled actuator that precisely regulates the airflow bypassing the throttle body, enabling the engine control unit to maintain the optimal idle speed for efficient and stable engine operation when the vehicle is at a standstill.
Idle Stabilizer Valve
The idle stabilizer valve is a critical component in the engine management system, responsible for regulating the airflow that bypasses the throttle body to ensure a smooth and consistent idle speed, preventing the engine from stalling or surging when the vehicle is stopped or idling.
Idler Arm
A crucial component in a vehicle’s steering system, the idler arm is responsible for transferring the driver’s input from the steering wheel to the wheels, enabling smooth and responsive turning.
Ignition Cables
Ignition cables, also known as spark plug wires, are an essential part of the vehicle’s ignition system, delivering the high-voltage electrical impulse from the ignition coils to the spark plugs, ensuring reliable and consistent engine ignition.
Ignition Coil
The ignition coil is an essential component in the vehicle’s ignition system, converting the low-voltage current from the battery into the high-voltage spark needed to ignite the air-fuel mixture in the engine.
Ignition Control Module
Electronic control unit that coordinates the ignition system, monitoring engine parameters and adjusting the spark timing for optimal performance and fuel efficiency
Ignition Distributor
The ignition distributor is a mechanical component in older vehicles that routes the high-voltage current from the ignition coil to the correct spark plug at the appropriate time, ensuring the engine’s cylinders fire in the proper sequence for optimal performance.
Ignition Harness
The ignition harness, also known as the spark plug wires, is the bundle of cables that transports the high-voltage electrical impulse from the ignition coils to the spark plugs, ensuring reliable and consistent ignition of the air-fuel mixture in the engine’s cylinders.
Ignition Interlock System
The ignition interlock system is a safety feature installed in some vehicles that requires the driver to provide a breath sample with a blood alcohol content (BAC) below the legal limit before the engine will start, helping to deter drunk driving and improve road safety.
Ignition Key Cylinder
The ignition key cylinder is the receptacle that holds the vehicle’s ignition key, enabling the driver to turn the key and start the engine, as well as engage the various electrical systems and components required for the vehicle’s operation.
Ignition Lock Cylinder
Cylinder that the ignition key is inserted into to start the vehicle; can be rekeyed or replaced if worn or damaged.
Ignition Module
The ignition module is a crucial electronic component that manages the ignition system, precisely controlling the timing and duration of the spark to optimize engine performance and efficiency.
Ignition Resistor
The ignition resistor is a crucial electrical component that regulates the current supply to the ignition coils, preventing excessive voltage that could potentially damage the coils or other sensitive ignition system components, ensuring the reliable and safe operation of the vehicle’s ignition system.
Ignition Switch
The ignition switch is the primary control for powering on the vehicle, enabling the driver to start the engine and engage the various electrical components and systems required for operation.
Ignition Switch Actuator
The ignition switch actuator is the component that converts the mechanical motion of the ignition key into electronic signals, allowing the driver to start the engine and power on the vehicle’s electrical systems, ensuring a seamless and reliable interface between the mechanical and digital components.
Ignition System Relay
The ignition system relay is a crucial electrical component that switches the high-voltage supply from the battery to the ignition coils, ensuring a reliable and consistent flow of electricity to the spark plugs, which is essential for starting and maintaining the engine’s operation.
Ignition Timing Sensor
The ignition timing sensor is a crucial electronic component that tracks the position of the engine’s crankshaft and camshaft, sending this information to the engine control unit to ensure the ignition system fires the spark plugs at the optimal timing for maximum engine performance and efficiency.
Ignition Wiring Harness
The ignition wiring harness is a comprehensive assembly of cables and connectors that distributes the high-voltage electrical current from the ignition control module to the individual ignition coils and spark plugs, ensuring a reliable and well-organized ignition system for optimal engine performance.
Impact Sensor
The impact sensor is a safety-critical component that monitors the vehicle’s motion, detecting sudden changes in velocity that indicate a collision has occurred, and then signals the airbag control unit to deploy the appropriate airbags to protect the occupants.
In-Dash USB Charger
Integrated USB port installed in the dashboard or center console to charge smartphones, tablets, and other USB-powered accessories.
In-Tank Fuel Pump
Electric fuel pump located inside the fuel tank that draws fuel and maintains the necessary pressure for the fuel injection system.
Indicator Light Bulb
The indicator light bulbs are small, specialized light sources that illuminate the warning lights and indicators on the instrument panel, such as the check engine light, oil pressure light, and turn signal indicators, providing the driver with important feedback about the vehicle’s operating conditions.
Indicator Light Lens
The indicator light lens is a transparent cover that protects the various warning and indicator lights within the instrument cluster, shielding them from physical damage, moisture, and other environmental factors while maintaining clear visibility for the driver.
Inertia Switch
The inertia switch is a safety device that detects sudden deceleration or impact, triggering the immediate shutdown of the fuel pump to prevent the risk of a fire or explosion in the event of a collision, helping to protect the vehicle and its occupants.
Injector
Electronically controlled fuel delivery component that injects atomized fuel directly into the engine cylinders for efficient combustion
Instrument Cluster
The instrument cluster, also known as the dashboard, is the central hub for the driver’s key vehicle information, providing a comprehensive overview of the car’s operating status, including speed, engine RPM, fuel level, and various warning indicators to keep the driver informed and aware of the vehicle’s condition.
Instrument Cluster Bezel
The instrument cluster bezel is the decorative housing or trim that encases the gauges, indicators, and displays within the instrument panel, contributing to the overall interior design and visual appeal of the vehicle while also protecting the underlying components from damage.
Instrument Cluster Lens
The instrument cluster lens is a protective cover that shields the various gauges, indicator lights, and digital displays within the instrument panel from physical damage, environmental elements, and wear, maintaining the clarity and visibility of the dashboard information for the driver.
Instrument Panel
The instrument panel, or dashboard, is the centralized interface for the driver, containing the speedometer, tachometer, fuel gauge, and various warning lights and controls, allowing the driver to monitor the vehicle’s performance and operating status at a glance.
Instrument Panel Bezel
The instrument panel bezel is the decorative housing or trim that encases the various controls, displays, and components within the instrument panel, contributing to the overall interior design and visual appeal of the vehicle while also protecting the underlying components from damage.
Instrument Panel Cluster
The instrument panel cluster, also known as the dashboard display, is the centralized hub for the driver’s key vehicle information, including speed, engine RPM, fuel level, and various warning lights, allowing the driver to monitor the car’s performance and status at a glance.
Instrument Panel Dimmer Module
The instrument panel dimmer module is an electronic component that automatically adjusts the illumination of the instrument cluster, dashboard, and other interior lights based on the surrounding ambient light levels, providing the optimal visibility for the driver in both daylight and nighttime driving conditions.
Instrument Panel Dimmer Switch
The instrument panel dimmer switch allows the driver to adjust the brightness of the instrument cluster, dashboard, and other interior lighting, providing the optimal illumination for nighttime driving and helping to reduce eye strain and fatigue.
Instrument Panel Finisher
The instrument panel finisher is the decorative molding or panel that covers and frames the various components and controls within the instrument panel, contributing to the overall cohesive design and visual appeal of the vehicle’s interior while also protecting the underlying elements from damage.
Instrument Panel Gauge Lens
The instrument panel gauge lens is a protective cover that shields the individual speedometer, tachometer, and other gauges within the instrument cluster from physical damage, environmental elements, and wear, maintaining the clarity and visibility of the critical driving information displayed for the driver.
Instrument Panel Illumination Bulb
The instrument panel illumination bulbs are the specialized light sources that provide the backlighting for the various gauges, warning lights, and digital displays within the instrument cluster, ensuring the driver can clearly see the important vehicle information in low-light or nighttime driving conditions.
Instrument Panel Lens
The instrument panel lens is a transparent cover that protects the various gauges, indicators, and displays within the instrument cluster, shielding them from physical damage, moisture, and other environmental factors while maintaining clear visibility for the driver.
Instrument Panel Trim
The instrument panel trim is the decorative molding or panels that frame the instrument cluster, dashboard, and other controls, contributing to the overall interior design and visual appeal of the vehicle while also protecting the underlying components from damage.
Intake Air Sensor
Also known as the Mass Air Flow (MAF) sensor, this component provides crucial data to the engine control unit for efficient combustion.
Intake Camshaft
Part of the valve train that controls the opening and closing of the intake valves, timed to the engine’s rotation to draw the fuel-air mixture into the cylinders
Intake Camshaft Position Sensor
Sensor that tracks the rotation of the intake camshaft, enabling the engine computer to precisely time the opening and closing of the intake valves.
Intake Manifold
The intake manifold is a vital component in the engine’s air intake system, responsible for evenly distributing the air-fuel mixture to the engine’s cylinders, ensuring efficient and balanced combustion for maximum power and fuel economy.
Intake Manifold Gasket
The intake manifold gasket is a critical sealing component that creates a tight seal between the intake manifold and the engine block, preventing air leaks that could disrupt the carefully balanced air-fuel mixture and negatively impact engine performance.
Intake Valve
The intake valve is a crucial component of the engine’s valve train, responsible for opening to permit the air-fuel mixture to be drawn into the cylinder during the intake stroke, ensuring the engine has the necessary ingredients for combustion and power generation.
Intake Valve Spring
The intake valve spring is a critical component in the engine’s valve train, exerting a strong force to quickly close the intake valve at the end of the intake stroke, preventing the reverse flow of the air-fuel mixture and maintaining the proper pressure and timing within the combustion chamber.
Intelligent Battery Sensor (IBS)
Electronic sensor that provides advanced battery monitoring and diagnostic information to the vehicle’s electrical system to optimize battery performance and lifespan
Intelligent Oil Life Monitor (IOLM)
Electronic system that tracks oil degradation based on vehicle operating conditions and notifies the driver when an oil change is due for optimal engine protection
Intercooler
The intercooler is a heat exchanger that reduces the temperature of the air being fed into the engine by a turbocharger or supercharger, allowing the denser, cooler air to be packed more efficiently into the cylinders, resulting in increased power output and improved fuel economy.
Intercooler Hose
The intercooler hoses are responsible for transporting the hot, compressed air from the turbocharger or supercharger to the intercooler, where it is cooled, and then onward to the intake manifold, ensuring the engine receives the optimum air charge for maximum performance and efficiency.

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