Four Seasons 158309 A/C compressor for the 2005-2011 Cadillac STS pressurizes refrigerant and moves it through the A/C system. This Four Seasons AC compressor is new and is designed to meet or exceed original equipment specifications for consistent cooling.
- New compressor tested for durability equal to 100,000 miles
- Pre-charged with 3 ounces of PAG oil
- Clutch included, with a 12-volt DC coil
- Pin connector made to plug in without splicing
Quick facts
- Part: Four Seasons 158309 A/C compressor
- Fits: 2005-2011 Cadillac STS
- Condition: New
Weak cooling, a whine or rattle with the A/C on, or a clutch that will not engage can mean a worn compressor, though other faults look the same. With the engine off, look at the belt, pulley and fittings for damage or oil residue; a shop can run pressure tests. If the compressor is at fault, this one replaces it.
Fits
It is a direct-fit replacement for the 2005-2011 Cadillac STS, which takes one compressor.
Specifications
Fit and size
- Quantity per vehicle: 1
- Pulley: 6 grooves, 4.250 in outside diameter
- Mounting type: Tangent mount
- Outlet C length: 108 mm
Build and materials
- Compressor type: Denso 7SBU16C
- Condition: New
- Refrigerant type: R134a
- Compatible oil: PAG 46
- Pulley belt type: Serpentine
- Country of origin: China
In the box
One A/C compressor with clutch, O-ring 24681, O-ring 24661 and sealing washers. Mounting hardware and a switch are not included, so plan on new bolts.
Installation notes
- May require use of the OE manifold.
Frequently Asked Questions
Does this Four Seasons compressor fit the 2005-2011 Cadillac STS?
Yes. Four Seasons 158309 is a direct-fit A/C compressor for the 2005-2011 Cadillac STS, which takes one.
Which O-rings and hardware come with the 158309 compressor?
Four Seasons 158309 comes with O-ring 24681, O-ring 24661 and sealing washers. Mounting hardware is not included.
How much PAG oil is already in this A/C compressor?
It comes pre-charged with 3 ounces of PAG oil. The compatible oil type is PAG 46, and the refrigerant type is R134a.
How can I tell if my A/C compressor is going bad?
Oil residue around the compressor, a squealing noise or a clutch that does not engage can be signs of a failing compressor. A shop can test the system pressures to confirm.
Does the 158309 compressor include the clutch?
Yes. Four Seasons 158309 includes the clutch, with a 12-volt DC coil. The switch is not included.
