https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image4d73f3042ba5466a9c681a34877eefec.txt

<h2>Car A/C&nbsp;expansion valve</h2>
&nbsp;
The expansion valve is a crucial component that plays a key role in regulating the flow of refrigerant through the car&rsquo;s AC system. It is positioned between the high-pressure and low-pressure sides of the AC system. The expansion valve acts as a valve or metering device that controls the flow of high-pressure, high-temperature liquid refrigerant from the condenser to the low-pressure side, where it can evaporate.
&nbsp;
<h2>How does an A/C expansion valve work?</h2>
&nbsp;
As the high-pressure liquid refrigerant passes through the Expansion Valve, it undergoes a rapid pressure reduction. This causes the refrigerant to expand and transform into a low-pressure, low-temperature gas.&nbsp;The expansion of the refrigerant leads to a significant drop in temperature. This cold refrigerant gas is then circulated through the evaporator coil in the car's AC system. The cold refrigerant gas absorbs heat from the surrounding air as it passes over the evaporator coil. This process cools down the air, which is then blown into the vehicle's interior by the AC blower fan.
&nbsp;
<h2>Signs of a bad expansion valve</h2>
&nbsp;
You should be aware of these common signs that may indicate a problem with the AC expansion valve:
<ul>
<li>Insufficient Cooling: Reduced cooling from the AC system.</li>
<li>Inconsistent Temperature: Difficulty maintaining a consistent interior temperature.</li>
<li>Warm Air at Idle: Warmer air from vents when the car is idle.</li>
<li>Excessive Cooling: Overly cold air and potential freezing of the evaporator coil.</li>
<li>AC Cycling Rapidly: Frequent on/off cycling of the AC compressor.</li>
<li>Hissing or Whistling Noises: Unusual noises from the AC system.</li>
<li>AC System Pressure Abnormalities: Irregular pressure readings in the AC system.</li>
<li>Frost on the Evaporator Coil: Ice buildup on the evaporator coil.</li>
</ul>

A/C Expansion Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecfb361ff6cc54b22b1f30236d8cb84ae.txt

Air Filter Box

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageef32df7428f2425b87301667c1ec9bd3.txt

Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

Air Intake Duct

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image172ed642cd5649409681f03dd9cb3946.txt

Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

Engine Air Duct Assembly

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image209fc8ff3521428080a60d3b94252f31.txt

Engine Air Filter

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0a94f36fd961461aa4c6e7d9631359f8.txt

Intake Manifold

Intake Manifold Flap Actuator

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagea8dd964331f6410bbb12b303bd28806f.txt

Intercooler

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image36d1a21a946c40cd88807cac4f16802c.txt

Oxygen Sensor

Car Oxygen Sensor Price From $24.99 | A-Premium

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image2874032448264cc89fcfd3d32e8c4bd4.txt

Pressure Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image71b6637412454ac48505f8fe656d59da.txt

Throttle Body

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image95a81ec8105e4580ac078f34b15f7105.txt

Throttle Position Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecff91ba9de7c4cb1932d544e82f0bf52.txt

Turbocharger

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedbb3e2f10990462aa8dbd76eb04c2e54.txt

Turbocharger Oil Line

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image73f58f2321b2459fb6919729a345e546.txt

Vacuum Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec297244633284630939f3bdf6d50529b.txt

Air Filters & Intake Systems

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image72a54af151ea46ae9a947a6c57ba4aae.txt

Camshaft Adjuster

Camshaft Adjuster Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0c746ef912ad473cb3d80560a2d7e0a5.txt

Camshaft Timing Gear

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageac12d53c77414db58a69179123e8d9a5.txt

Camshafts

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecd9a40b4eb4546c08e376fe1b7fe5819.txt

Engine Valve Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec9ce5895dea14f089b6df8f067fd618b.txt

Harmonic Balancer

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image04246ffa3e3a4cca9c49011214ff6a6f.txt

Timing Belt Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageeeb3265558bd478fbac20059ec555c8c.txt

Timing Chain Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image5af48eb273014fb5a489fe6bb5d14c1e.txt

Timing Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image77c0478f7034493f91708786ed8fc52c.txt

Timing-Control Valve Solenoid

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageff7f4b3ee7204c2d93e5d7f67976617f.txt

Valve Lifters Tappet

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image4ed51fbea7bc4818aa193ac0256a2f42.txt

Cams, Timing & Valvetrain

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image7e54d40a14d3470cb6c0e1820c263b93.txt

Belt Tensioner

Coolant Level Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageef7c9a21b8f3481fafd9dc34deefd95e.txt

Crankcase Breather Hose

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image9a51da7735e648caa411dd19fe3015c6.txt

Crankcase Breather Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0f26e0448a8b4d72a06bbefb2c03ab27.txt

Crankshaft Position Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image69a46fdd403d4aee988b03c7ce172cb1.txt

Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagea7c063be923740da92163da876f8499f.txt

Flywheel

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image850df044e5234274b30aa010ee94dba5.txt

Oil Cooler

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageebaf93bfb7c046d789a04bb0ac166235.txt

Oil Cooler Line

Oil Filler Cap

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image0a064858e22c4a7ba148c91978e1e5a8.txt

Oil Filter

Oil Filter Base

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image32b3ec52ad0249e58ed4ae5303d2f0e7.txt

Oil Filter Housing

Oil Filter Housing Cover

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedef8d67a5f484cb2a2d594d50eb5b73a.txt

Oil Level Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagee113aaa2222d49448a25eb9c355123e1.txt

Oil Pan

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec53c3f4f8470449caa2c14852afab4e6.txt

Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Cranks, Pistons, Oil & Components

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image5e4e697a02574c87ae0b5cfda83cd3e8.txt

Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec81e856f9df545e6a9f4b11411937f3d.txt

Glow Plug Relay Module

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image74cc3f1efb2d492684aac85a1f3bd96f.txt

Ignition Coil

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image57ca3e4e8038449ab08157e98602f20b.txt

Ignition Coils & Spark Plugs Kits

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image41d187d382d941e79a6cde28a906b960.txt

Ignition Distributor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedf6ffde1de044334b7320f4e47bcd934.txt

Ignition Starter Switch

Ignition Switch Actuator

Knock Detonation Sensor

Relay

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image50b27b80d8bb4caa97e9d3e5826bee31.txt

Spark Plug

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image27a6097036004160abe4de68c69ffa5c.txt

Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Engine Components & Accessories

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image1bcab546ad734695ae275b9f5387598a.txt

Auxiliary Water Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image134c67bba50247a988314c79d505b0d6.txt

Expansion Tank

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagefc43366b4109446c870f3055074a7e71.txt

Expansion Tank Mounting Plate

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imaged8199a7345cc43e88a5d14ecfb40b3a2.txt

Fuel Cooler

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image8ddda567a60c477c9a65cf6cdae4c553.txt

Radiator

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagee5529da684c54cf9bfe4c53e51d23532.txt

Radiator Hose

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagea7d3d16b9dd44ff080d87ecaf742aac8.txt

Radiator Support Assembly

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagedc0ba0ee1887431a9916caaffd9b039b.txt

Temperature Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef5bb80a8289d4f4aa97ca832df326a98.txt

Turbo Hose

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image140a0119a00647d293656500204d1240.txt

Water Coolant Pipe

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image3f8f1ada421d4315bbe16795fddae29e.txt

Water Outlet

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imaged782e20933d346be8c825ba03dacd7a2.txt

Engine Cooling

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image3baa7d4f13b240f4b434c1a3ecef6b46.txt

Engine Mount

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef4560369a27b422e8cae72e315cac999.txt

Engine Mounts

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image2bc060e1e59d437ca23550a9632b5785.txt

Catalytic Converter

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image9e0c65cba4314bd3831f99d93c5286bd.txt

EGR Valve

Emissions Fluid Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagecd6cce2d648a4d48968f715fd63dd449.txt

Exhaust Fluid Heater

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image769619b70dfc4e12836a6e96b271bdf2.txt

Exhaust Gas Temperature Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image138fc20360e046148a51e1ac65c19920.txt

Exhaust Manifold

Fuel Tank Breather Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec580b273dbec426f9ab82d06997d1ac2.txt

Fuel Vapor Leak Detection Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image276214f15ce14047994dab09b028b3d2.txt

Nitrogen Oxide Sensor

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef458952c2a4d48fa8299c4f50b2e07d1.txt

Secondary Air Injection Check Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagec2b2e038a9d248e4b05934cb21b38993.txt

Vapor Canister Vent Solenoid

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imageaf4ec04f6a89458b80a30eeb16eadbfb.txt

Exhaust & Emission Systems

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image97facfcbb86b43b4a9ad188ac8fa6c29.txt

Fuel Filter

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image95e2429ba38b48afaf44a5d71960a2b3.txt

Fuel Injection Control Module

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image35a18fc091664f2eb09491c55a106d58.txt

Fuel Injection Pressure Regulator

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image8f88e319f3214f1ca53d04303247e06d.txt

Fuel Injector

Fuel Injector Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image03b440fe157e4382a3e5c145a3a5721f.txt

Fuel Injector Module Wiring Harness

Fuel Line Kit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image91ddc33aff3241aeadb57bbe08a346b8.txt

Fuel Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/imagef432a18989f549c2a49737a9ddf24a97.txt

Fuel Sending Unit

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image16546efb48224a6bb15be0aa836d48bc.txt

Fuel Tank Filler Neck Pipe

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image8b0e72eca99740429d7f4987e96df2f7.txt

Fuel Tank Strap

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image538dc8bcfb96428abc9247d043f29d80.txt

High Pressure Fuel Pump

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image73ba032c33ed4306ade78f43cf04508a.txt

Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image79546737cea74c66b4c6ea8b0c0348c7.txt

Fuel Systems & Components

https://yt-prod-media-assets.s3.us-east-2.amazonaws.com/2022/item/description/image9e422512f0f44681934e568b8dc0892a.txt

The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

1985 Mercedes-Benz 500SEL A/C Expansion Valve

Shop By Mercedes-Benz Years