2003 Toyota Sienna Cooling and Climate Controls

Carquest Hose Assemblies are designed to carry refrigerant in an air conditioning system. They are manufactured to meet or exceed original equipment specifications and are designed to easily fit into the engine compartment.

Product Features:

• 100% of hose assemblies use Goodyear hoses that meet original equipment specifications for wall thickness and permeation.
• Tubes and mufflers are designed to meet original equipment specifications for wall thickness.
• Fittings are designed to couple and seal to eliminate leaks. Trivalent plating is used on steel fittings to enhance corrosion resistance. The fittings conform to original equipment specifications to allow for the proper fit with related air conditioning
• Welds and crimps meet and exceed original equipment tension specifications.
• Manufactured to allow flexibility in the hose to conform to engine compartments.
• O-Rings necessary for installation are included.

Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:

• High grade stainless steel and copper construction
• Meets or exceeds OEM standards
• Consistent and precise response to cooling system needs
• Original equipment design for worry-free direct fit replacement
• 100% tested and calibrated

SEAL RING – COPPER

Dorman’s Engine Coolant Thermostat Housing has improved durability and resistance. It withstands the extreme changes in temperature that frequently cause housing to become brittle, crack and leak. Maintain the steady flow of coolant and lessen the chances of overheating.

Product Features:

• Direct replacement for a proper fit every time
• Hoses slide on for easy installation
• High-quality plastic or metal construction
• Includes all hardware necessary for a complete repair (where applicable)

High quality OE replacement part with all components needed to complete the job

Product Features:

• All the seals needed to complete the job
• Compatible with both R134a and R12 refrigerants
• Application specific
• SUV and rear air applications

Carquest Standard compressors offer reliable, long-lasting performance for a leak-free, dependable repair.

Product Features:

• Built in a TS16949 certified manufacturing environment to ensure consistent quality that meets or exceeds OE specifications for fit, form, function and durability
• All remanufactured compressors are built using the latest compressor technology available today and using strict remanufacturing processes
• All units have new seals, O-rings, gaskets and clutch bearings
• Tested for noise, vibration, durability, vacuum decay and pressure decay to ensure no leaks and longer life

Carquest Premium offers a complete line of automotive heaters covering 94% of all North American vehicle applications. Carquest Premium provides value in several ways, including increased thermal performance and resistance to corrosion using enhanced design features, such as the latest fin and tube technology and design standardization for maximum availability. Carquest Premium offers certified heaters that meet or exceed OE specifications and are all fitment checked in the actual vehicle’s HVAC heater module and are, thus, ready to be installed right out of the box for a “Drop-In Fit”. Carquest Premium heaters are engineered and manufactured under ISO TS16949 quality systems and are 100% leak tested.

Product Features:

• All heater cores are designed and tested to match or exceed OE specifications for form, fit and performance with a clear focus on obtaining the highest heat transfer performance possible through use of quality materials and manufacturing processes to ensu
• Premium parts you can rely on; The finest quality at a great price. The finest quality at the most competitive price /or/ Premium quality at the most competitive price.
• CARQUEST heaters are engineered and manufactured under ISO TS16949 quality systems and are 100% leak tested.
• Designed to keep your A/C system in top shape and built to provide long-lasting service
• Provides value in several ways, including increased thermal performance and resistance to corrosion using enhanced design features, such as the latest fin and tube technology and design standardization for maximum availability.
• CARQUEST offers a complete line of automotive heaters covering 94% of all North American vehicle applications.
• Our advanced engineering methods coupled with our innovative manufacturing technology provides products to the aftermarket that meet or exceed form, fit, and function of OEM Parts

Permatex’s The Right Stuff 1 Minute Series offers the fastest return to service in just 1 minute! This leak-proof, elastomeric “Formed-in-place” material is more reliable and longer lasting than pre-cut gaskets. It is blowout resistant and protects against leaks and seepage caused by vibration and thermal expansion. The Right Stuff 1 Minute Grey is specified for high torque and high vibration applications and is formulated to meet or exceed performance standards for long-term sealability, durability and handling.

Product Features:

• Designed to perform under higher torque loads associated with engines having closely spaced bolt patterns
• Sensor-safe, non-corrosive, RTV silicone
• Protects against leaks caused by vibration and thermal expansion
• Meets performance specs of OE silicone gaskets
• Quickly returns vehicle to service in just 1 minute

CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

The Premium CarQuest Vehicle Solutions line of vehicle electronics are designed for OE form, fit and function for both import and domestic vehicles. The A/C Pressure Switch monitors system pressures, aiding in proper and efficient control of the compressor, fans and system levels. An improperly functioning A/C Pressure Switch will provide erratic or inaccurate actuation and operation, severely affecting system performance and function. Without reliable and accurate actuation from a properly functioning A/C Pressure Switch, critical components and the system as a whole are left unregulated and unprotected which can lead to excessive wear and tear on critical components and costly system damage.

Product Features:

• Designed and manufactured with high quality materials, industry leading electronic components and strict quality controls. Engineered to meet or exceed OE performance and to meet the uncompromising demands of service professionals.
• Direct fit replacement matches proper OE fit, form, and function and ensures trouble free installation of your A/C Pressure Switch.
• All units are tested using advanced end-of-line equipment that pressurize the A/C Pressure Switch, confirm proper calibration and functionality, and check for leaks to ensure each A/C Pressure Switch meets manufacturing specifications before packaging.

CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

Manufactured to meet or exceed OEM specifications.

Product Features:

• 100% leak testing and hub-pull testing ensures reliable performance.
• O.E.-supplied NEW unitized seals ensure long-lasting, trouble-free performance.
• The proper O.E. specified bearing design is installed to meet the specific radial and axial load requirements of each application. This ensures longer bearing life and reliable performance.
• Thermostat seal and mounting gasket are supplied for ease of installation (where applicable).
• 100% Factory tested for leakage and dimensional precision

Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:

• Maintains proper cooling system pressure
• Easy installation and removal
• 100% tested to ensure proper pressure and longevity
• Meets all OEM specifications

Water Inlet Gasket, O-ring

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

• High-quality products that meet OE appearance and performance to

This engine cooling fan pulley bracket is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:

• Direct replacement – this engine cooling fan pulley bracket matches the fit and function of the factory part on specified years, makes and models
• Ideal solution – this bracket is a reliable replacement for an original part that has failed due to fatigue
• Durable construction – this part is made from quality materials to ensure reliable performance and long service life
• Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

The Forecast Engine Cooling Thermo-Fan Switch is a high quality Original Equipment replacement that is manufactured to meet or exceed OE specifications for fit, form, and function.

Product Features:

• Corrosion resistant housings
• Nickel-plated or brass terminals for superior conductivity
• High-temp composite O.E.M.-type connectors designed to mate with vehicle wiring harness without modification
• Thermal switches matched to OEM temperatures to assure consistent performance

The Denso A/C Blower Control Unit is a high quality Original Equipment replacement that is manufactured to meet or exceed OE specifications for fit, form, and function.

Product Features:

• Premium Original Equipment replacement
• Provides performance and dependability
• Manufactured to meet OE specifications

Carquest premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

High quality OE replacement part with all components needed to complete the job

Product Features:

• Meets or exceeds OE design and performance
• Magnetic size and properties compare or exceed OEM
• Windings meet or exceed OEM specifications
• Motor RPM equivalent to or exceeds OEM motor

DENSO’s engine coolant temperatures sensors are manufactured to the stricktest OE standards resulting in superior efficiency. OE quality with precise sensing elements. Exact fit which controls fuel injection ignition timing and transmission shifting.

Product Features:

• OE technology adapted for the aftermarket
• Reduces emissions, increased performance
• Delivers the highest reliability and detection accuracyá

Carquest premium direct replacement resistors are designed to match the operation and performance of the original equipment to restore the proper heating and cooling functionality.

Product Features:

• Restores Functionality- Manufactured to original equipment specifications to restore full HVAC operation
• Original equipment quality – Carquest blower motor resistors meet the high quality material standards and tolerances as the original equipment
• Complete kit – Each kit includes the resistor, connector, and splice connectors to complete the job
• Direct replacement – Carquest blower motor resistor kits are a direct replacement to the original equipment resistor

DENSO is a leading supplier of radiators to OE car makers around the world. Manufacturers rely on our quality and innovation to remain on the leading edge of engine cooling technology. Our OE experience and know-how ensure our products provide unmatched performance, reliability and fitment. Radiator performance is essential for proper engine cooling and function. DENSO’s radiator configurations, tanks, fin pitch, core dimensions and materials meet OE manufacturer’s rigid standards. All DENSO radiators pass our strict durability and function tests. As the result, our radiators deliver reliable performance even under the most demanding conditions. Radiator types: Plastic tank with aluminum core. Plastic tank with copper core. Cross-flow and down-flow configurations. DENSO is known for the unsurpassed quality of its products. Plastic, copper or aluminum components: it doesn’t matter. Our DENSO radiators are dependable, lightweight and made to last. An investment in a DENSO radiator will pay dividends in the long run. Radiators can fail causing leaks or inefficient cooling. This can lead to your engine to run hotter which in turn creates excess wear and tear on the engine. DENSO radiators are designed with our First Time Fit® philosophy in mind. You get radiators that drop in easily without the need for adjustment, brackets or modification of any kind. Our radiators are precision built to provide the right part, the right fit, the first time.

Product Features:

• Fin Pitch – Superior fin waves provide a higher heat transfer.
• Flow Configuration – Available in cross-flow and down-flow configurations.
• Aluminum or Copper Core – Thin-tube construction assures maximum cooling efficiency.

An electrical relay is sort of a magical device: it takes a small electrical signal and uses it to manage a much more powerful current, permitting electrical systems to be both lighter and more dependable at the same time. DENSO has supplied quality relays to the OE automotive world for over 60 years. The very same performance and dependability are available across the replacement aftermarket with DENSO First Time Fit® relays. Engineered to meet the most stringent automaker standards for shock resistance, arcing, and thermal protection, DENSO auto relays feature the lowest return rates in the industry; that equals value for car owners and repair facilities alike

Product Features:

• Lead-free, solderless construction prevents heat shock and arcing
• Controlled contact force, self-adjusting air gap increase longevity of the internal parts
• Industry-standard packaging and footprint
• Low heat generation
• Reduced electrical loads
• Built to last

Carquest Expansion Valves are designed to regulate the flow of refrigerant through the air conditioning system to provide optimal cooling to the passenger compartment. Each expansion valve is manufactured to original equipment specifications to perform its function even in the harshest climates. Each part is supplied with the necessary gaskets and o-rings for installation.

Product Features:

• The bodies of these expansion valves are machined from a single block of aluminum or brass metal.
• Each expansion valve has settings for tonnage and superheat based on the vehicle specifications.
• Each expansion valve is tested for function and leakage according to OEM specifications to ensure optimal performance of the air conditioning system.
• O-Rings necessary for installation are included.
• Precision machined ports

Fan motor no longer working properly? This blower motor resistor connector is designed to replace an original equipment connector damaged by corrosion or overheating. Corrosion-resistant terminals ensure reliable performance.

Product Features:

• Ideal replacement – this complete blower motor resistor connector assembly is a direct replacement for this vehicle application
• Damage-resistant – the connector assembly is engineered to impede corrosion and heat damage
• Complete repair solution – includes pre-assembled wiring harness/pigtail and connector terminal
• Excellent value – this part offers original equipment quality without the cost and hassle of replacing the entire wiring harness

Tester adapter for the MT-300 cooling system pressure testers. Professional grade test equipment to ensure an automotive cooling system is operating at the correct pressure. Made from high quality materials to ensure durability. Designed to test automotive coolant caps.

Product Features:

• Machined metal construction
• Works with MT-300 pressure tester
• Tests coolant caps
• Professional quality

Permatex’s The Right Stuff 1 Minute Series offers the fastest return to service in just 1 minute! This leak-proof, elastomeric “Formed-in-place” material is more reliable and longer lasting than pre-cut gaskets. It is blowout resistant and protects against leaks and seepage caused by vibration and thermal expansion. The Right Stuff 1 Minute Grey is specified for high torque and high vibration applications and is formulated to meet or exceed performance standards for long-term sealability, durability and handling.

Product Features:

• Designed to perform under higher torque loads associated with engines having closely spaced bolt patterns
• Sensor-safe, non-corrosive, RTV silicone
• Protects against leaks caused by vibration and thermal expansion
• Meets performance specs of OE silicone gaskets
• Quickly returns vehicle to service in just 1 minute