HomeEmission Control > Evaporative SystemStandard Ignition CP3731 Vapor Canister
Part #: CP3731

Standard Ignition CP3731 Vapor Canister

⚙️ 21 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Lexus, GS F, GS350, and IS350
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Overview of Standard Ignition Vapor Canister CP3731

The Standard Ignition CP3731 vapor canister is designed to support the evaporative emission control system in select Lexus vehicles. Engineered with a charcoal filter media, this black vapor canister helps reduce harmful fuel vapors from escaping into the atmosphere, ensuring compliance with emission standards for Lexus GS350, GS F, and IS350 models.

  • Color/Finish: Black for durability and corrosion resistance
  • Connector Gender: Female with a rectangular shape for secure fitment
  • Includes one connector and three ports for efficient vapor flow
  • Filter Element Included: Charcoal media to absorb fuel vapors
  • Terminal Type: Male pin terminals, seven in total for reliable electrical connections
  • Compatible with Lexus GS350, GS F, and IS350 models

Detailed Product Description

The CP3731 vapor canister by Standard Ignition is a critical component of the evaporative system, designed to capture and store fuel vapors from the fuel tank. Its charcoal filter media effectively traps hydrocarbons, preventing them from being released into the environment. The canister features a black finish that resists wear and environmental exposure. It includes one female rectangular connector and seven male pin terminals, ensuring proper electrical connectivity within the vehicle’s emission control system. With three ports, this vapor canister facilitates optimal vapor flow and system performance.

Compatible Lexus Models and Applications

This vapor canister is specifically compatible with the following Lexus vehicles:

  • Lexus GS350
  • Lexus GS F
  • Lexus IS350

It is designed to replace the original vapor canister in these models, maintaining the integrity of the evaporative emission control system.

Common Issues Addressed by Vapor Canister Replacement

  • Fuel odor inside or around the vehicle
  • Check engine light triggered by EVAP system faults
  • Failed emissions tests due to vapor leaks
  • Rough engine idle caused by vapor system malfunctions
  • Fuel tank pressure irregularities

Installation Notes and Tips

When installing the Standard Ignition CP3731 vapor canister, ensure the female rectangular connector aligns properly with the vehicle’s wiring harness. Verify that all three ports are securely connected to the corresponding hoses to prevent vapor leaks. Since mounting hardware is not included, reuse the original fasteners or acquire compatible hardware. It is recommended to inspect related EVAP system components during installation for optimal performance.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications. The CP3731 vapor canister undergoes rigorous quality control to ensure durability and reliable operation within the Lexus evaporative system. Please refer to Standard Ignition’s warranty policy for specific coverage details.

BrandStandard Ignition
Part NumberCP3731
Color/FinishBlack
Connector GenderFemale
Connector Quantity1
Connector ShapeRectangular
Filter Element IncludedYes
Filter MediaCharcoal
Mounting Hardware IncludedNo
Port Quantity3
Terminal GenderMale
Terminal Quantity7
Terminal TypePin

This part fits 21 vehicles. Search below:

YearMakeModelPositionNotes
2021LexusIS350N/A
2020LexusGS FN/A
2020LexusGS350N/A
2020LexusIS350N/A
2019LexusGS FN/A
2019LexusGS350N/A
2019LexusIS350N/A
2018LexusGS FN/A
2018LexusGS350N/A
2018LexusIS350N/A
2017LexusGS FN/A
2017LexusGS350N/A
2017LexusIS350N/A
2016LexusGS FN/A
2016LexusGS350N/A
2016LexusIS350N/A
2015LexusGS350N/A
2015LexusIS350N/A
2014LexusGS350N/A
2014LexusIS350N/A
2013LexusGS350N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

2-705917774030350CP1895CP3731VC4636

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.