Four Seasons 33181 A/C Accumulator
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Four Seasons
 Accumulator

Four Seasons 33181 A/C Accumulator

Brand Four Seasons 33181
Body Diameter 3.500
Body Length 9.000
Description Accumulators
Dia. MM 88.900
Friction Material Attachment w/o Service Port
Inlet Fitting Diameter 3/4
Inlet Fitting Type Female O-Ring
Inlet IN 0.750
Inlet MM 19.050
Length MM 228.600
Material Aluminum
Meets / Exceeds OEM? Yes
Mounting Hardware? Not Included
O-Ring A Number/Desc [24650] / Green O-Ring
O-Ring B Number/Desc [24612] / Green O-Ring
Outlet Fitting Diameter 0.750
Outlet Fitting Type Male Insert O-Ring
Outlet Fraction 3/4
Outlet MM 19.050
Printed Foot Note Swivel Top/Universal Accumulator also available Part No. [33705] - Tube kit not required.
Style Complete Unit
Switch w/ Switch Port
Switch Port Dia. IN 0.250
Switch Port Dia.MM 6.350
Type Accumulator
Product line Accumulator
Fits Pontiac · 4 vehicles

OE direct replacement. Meets or exceeds OEM requirements for dependable A/C service.

Aluminum construction. Lightweight body helps resist corrosion in the HVAC system.

Complete unit. Includes the accumulator with switch port and O-ring seals.

Cross-references Bosch 16488, Eastern Catalytic 41392 and Four Seasons 4392N for the same application. See all 33.

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Four Seasons 33181 A/C Accumulator

The Four Seasons 33181 A/C accumulator is a complete aluminum replacement built for HVAC systems that use a female O-ring inlet and male insert O-ring outlet. It meets or exceeds OEM requirements and includes a switch port for applications that require it. This A/C accumulator is listed for 1985-1988 Pontiac Fiero, making it a direct-fit option for Pontiac Fiero A/C accumulator replacement service.

Key Features

  • Brand: Four Seasons Accumulator line
  • Part number: 33181
  • Complete unit construction
  • Aluminum body for HVAC durability
  • Female O-ring inlet and male insert O-ring outlet
  • Switch port included; no service port
  • Meets or exceeds OEM specifications
  • Compatible with 1985-1988 Pontiac Fiero A/C accumulator applications

Product Details

Four Seasons 33181 is an A/C accumulator designed for the low-side refrigerant circuit in systems that require moisture and debris management before refrigerant returns to the compressor. The unit measures 3.500 inches in body diameter and 9.000 inches in body length, with 3/4-inch inlet and outlet connections. Its aluminum construction and OEM-level fitment make it a practical replacement for Pontiac Fiero HVAC service, especially when restoring proper A/C system operation on 1985, 1986, 1987, and 1988 models.

This part cross-references UAC RD6254C for the same application.

What It Helps Fix

  • Low-side refrigerant moisture buildup
  • Debris contamination in the A/C circuit
  • Compressor protection issues caused by poor accumulator performance
  • Improper refrigerant flow through a worn or leaking accumulator
  • HVAC service problems on Pontiac Fiero A/C systems

Installation Notes

Verify inlet and outlet fitting style before installation: female O-ring inlet, male insert O-ring outlet, with a switch port and no service port. Replace the O-rings during service and confirm the system uses the correct accumulator configuration for the vehicle. For 1985-1988 Pontiac Fiero, match the existing HVAC layout before final assembly.

Quality Assurance

Four Seasons lists this accumulator as meeting or exceeding OEM requirements. The part is built as a complete unit for consistent replacement performance in A/C service work.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1988PontiacFieroN/AOptional swivel top or universal A/C accumulator; no tube kit required.; Accumulator
1987PontiacFieroN/AOptional swivel top or universal A/C accumulator; no tube kit required.; Accumulator
1986PontiacFieroN/AOptional swivel top or universal A/C accumulator; no tube kit required.; Accumulator
1985PontiacFieroN/AOptional swivel top or universal A/C accumulator; no tube kit required.; Accumulator
Directly replaces or cross-references 33 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 16488Eastern Catalytic — 41392Four Seasons — 4392NFour Seasons — 33181Gates — 21585Gates — 21670Global Parts Distributors LLC — 1411331UAC — RD6254C16488D15139215167017256420756420854370366070507270854311314951148140014882243049313305931337050723723205713318111133181VA8378AC2338AC2338CCWK705072ED564RD6254T33181