A-Premium AC Expansion Valve for Toyota Lexus Cadillac – Direct-Fit Replacement, OEM Form-Fit Function

The A-Premium AC expansion valve is a direct-fit replacement part that restores proper refrigerant metering and helps your vehicle’s air conditioning blow colder, more consistent air.

This precision-engineered thermal expansion valve from A-Premium is designed to match OEM form, fit and function for a wide range of Toyota, Lexus, Cadillac and Jaguar models. It replaces the original metering device to regulate refrigerant flow into the evaporator, improving system performance when the original valve fails, plugs, or leaks. Supplied with a one-year unlimited-mileage warranty, the kit includes components and reference numbers for quick verification against factory parts.

Which cars will this expansion valve fit?

This valve covers many model years and engine sizes across several brands. It lists compatibility with multiple Cadillac CTS and STS years, Jaguar XF and XJ variants, Lexus ES and RX models, and a wide spread of Toyota Camry, Avalon, Highlander, Sienna and Venza applications. Always cross-check the listed reference numbers and fitment notes with your vehicle VIN before purchase.

• Cadillac CTS & STS — select 2005–2015 model years and specified engine sizes
• Jaguar XF, XJ and performance XJR variants — multiple 2010–2019 applications
• Lexus ES350 and RX350/RX450h — mid 2000s to mid 2010s models
• Toyota Camry, Avalon, Highlander, Sienna, Venza — common 2005–2013 model coverage

How does replacing the expansion valve affect AC performance?

The expansion valve meters refrigerant into the evaporator at the correct rate for current operating conditions. A worn or clogged valve causes poor cooling, fluctuating cabin temperatures, or excessive compressor cycling. Replacing it restores proper refrigerant control so the evaporator can absorb heat efficiently and the cabin reaches set temperatures faster.

• Restores stable refrigerant flow for consistent cooling
• Prevents evaporator freeze-up or insufficient cooling
• Reduces unnecessary compressor on/off cycling and wear

What should I check before ordering this part?

Verify the part using your vehicle’s model year, engine size, and the reference numbers provided in the fitment list. Note fitment specifics such as “front side only” for certain Toyota Highlander and Sienna applications. If unsure, compare the original valve’s shape and connection type to ensure the A-Premium unit matches your system.

• Confirm vehicle year and engine displacement against fitment table
• Compare OEM reference numbers: 4752068, 39186, 19129999, etc.
• Note special fitment: Highlander & Sienna require front-side application only

What does the one-year warranty cover and how do I install it?

A-Premium includes a one-year unlimited-mileage guarantee that covers defects in materials and workmanship. Installation typically requires qualified HVAC service: evacuating refrigerant, swapping the valve, replacing any seals, and vacuuming and recharging the system to OEM refrigerant specs. If you lack the tools or certification, have a certified technician perform the replacement to avoid system contamination or refrigerant handling violations.

• Warranty covers manufacturing defects for one year, unlimited miles
• Professional installation recommended — requires refrigerant recovery and recharge
• Replace o-rings and drier/receiver if service interval suggests

Who is this part for? If you drive one of the listed Toyota, Lexus, Cadillac or Jaguar models and your air conditioning shows weak cooling, temperature swings, or irregular compressor cycling, this A-Premium expansion valve is a practical OEM-style replacement. It’s aimed at DIY mechanics with HVAC experience and professional shops that need a reliable, cross-referenced valve with broad model coverage and a straightforward warranty.