SX-3997 DENSO AUTO PARTS Ac Expansion Valve Heating Air Kc H4

Review DENSO AUTO PARTS Ac Expansion Valve For Subaru 2.5l Heating Air Kc for SUBARU FORESTER H4 1998–2002

The Denso A/C Expansion Valve, part number SX-3997, is a crucial component of the air conditioning system in select 1998-2002 Subaru Forester models equipped with a 2.5L H4 engine and KC heating system. This valve is manufactured by Denso, a leading automotive components manufacturer known for its high-quality products.

The primary function of this expansion valve is to regulate the flow of refrigerant R134a into the evaporator core in your Subaru Forester's air conditioning system. By metering the refrigerant flow, the Denso SX-3997 ensures proper temperature control and efficient cooling performance.

This expansion valve is designed specifically for the Subaru Forester's KC heating system, which is an electronically controlled climate control system. The valve features an electric actuator that allows the valve to adjust the refrigerant flow based on the driver's selected temperature settings. This results in a more comfortable cabin temperature and improved overall driving experience.

The Denso SX-3997 expansion valve is built to last with high-quality materials and precise manufacturing processes. It is designed to withstand the harsh conditions of an automotive environment, including extreme temperatures and vibration. The valve's durable construction ensures reliable operation and long service life, reducing the need for frequent replacements.

If you're experiencing issues with your Subaru Forester's air conditioning system, such as insufficient cooling or temperature fluctuations, a faulty expansion valve could be the culprit. Replacing the Denso SX-3997 expansion valve with a genuine OEM part is an effective solution to restore proper cooling performance and enhance overall system efficiency.

In summary, the Denso A/C Expansion Valve, part number SX-3997, is a crucial component of the Subaru Forester's air conditioning system for 1998-2002 models with a 2.5L H4 engine and KC heating system. Its primary function is to regulate refrigerant flow for efficient cooling and temperature control. The valve's electric actuator allows for precise adjustments based on driver-selected temperature settings. Built with high-quality materials and precise manufacturing processes, the Denso SX-3997 expansion valve is designed for long service life and reliable operation, making it an excellent choice for Subaru Forester owners seeking to maintain the optimal performance of their vehicle's air conditioning system.

Denso Auto SX-3997 AC Expansion Valve for 1998-2002 Subaru Forester 2.5L H4 Heating: Pros, Cons, and Conclusion

The Denso Auto SX-3997 AC expansion valve is specifically designed for the 1998-2002 Subaru Forester 2.5L H4 heating system. Like any automotive part, it comes with its advantages and disadvantages. In this analysis, we will discuss the key pros and cons to help you make an informed decision about purchasing this Denso expansion valve.

1. OEM Quality: Denso is a well-known and trusted manufacturer in the automotive industry. The SX-3997 expansion valve is an original equipment manufacturer (OEM) part, which means it is designed and engineered to meet or exceed the original specifications of the Subaru Forester.

2. Improved Performance: A faulty or worn-out AC expansion valve can lead to inadequate heating and cooling performance. Replacing it with a new one, such as the Denso SX-3997, can help restore the desired temperature comfort in your vehicle.

3. Longer Lifespan: By using a high-quality OEM part like the Denso SX-3997, you can expect a longer lifespan compared to aftermarket alternatives. This can save you time and money in the long run.

4. Enhanced Safety: Proper functioning of the heating and cooling system is essential for comfortable and safe driving conditions. A malfunctioning expansion valve can lead to potential safety hazards, such as reduced visibility due to fogged-up windows or even engine overheating.

5. Warranty Coverage: Denso offers a warranty on their parts, ensuring peace of mind for customers. The length of the warranty may vary depending on the specific part and the retailer, so be sure to check with your supplier for details.

1. Cost: The Denso SX-3997 AC expansion valve may be more expensive than aftermarket alternatives. However, the OEM quality and potential for longer lifespan may outweigh the initial cost difference.

2. Availability: Depending on your location and the specific retailer, availability of the Denso SX-3997 expansion valve may be a concern. It's essential to check with your preferred auto parts supplier to ensure they have the part in stock before placing an order.

In conclusion, the Denso Auto SX-3997 AC expansion valve is a high-quality OEM part designed specifically for the 1998-2002 Subaru Forester 2.5L H4 heating system. While it may come with a higher price tag compared to aftermarket alternatives, the advantages of improved performance, longer lifespan, enhanced safety, and potential warranty coverage make it a worthwhile investment for those seeking a reliable and effective solution. If you prioritize the peace of mind that comes with using a genuine OEM part, the Denso SX-3997 expansion valve is a solid choice for your Subaru Forester.

Details:

Denso ac expansion valve for 1998 - 2002 Subaru Forester 2.5l H4 heating air kc: status: in stock.

specifications aircondiheat:

• for models: H4, Forester
• for makes: Subaru
• for years: 1998–2002
• brand: Denso Auto Parts
• mpn: Sx-3997
• manufacturer warranty: 1 Year
• ipn: C606 69-20
• placement on vehicle: Hvac A/c Flow Restrictors
• compatible model: Forester
• compatible year: 2002 2001 2000 1999 1998
• core charge: Free No Core Charge
• type: A/c Expansion Valve
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Denso A/c Expansion Valve

seller aircondiheat:

• rating: 99.3%
• city: indianapolis, indiana
• # reviews: 604697

shipping aircondiheat:

• type: fixed
• service: standard, expedited
• class: standard, expedited
• transit: 3-7 days

payments aircondiheat:

• credit card: visa
• wallet: apple-pay
• other

offer aircondiheat:

• in stock #: 5
• sold #: 11
• started: december 19, 2025
• prices: $24.05–$100.89
• item condition: New
• availability: in stock
• options: ship-to-home

returns aircondiheat:

• time: 30 days
• policy: returns accepted
• paid by: seller

general aircondiheat:

• category: Auto Parts > Car Truck Accessories > Air Conditioning Heating