1. Introduction
This manual provides essential information for the proper installation, function, and maintenance of your Mazda KLG4-13-988 Vapor Canister Filter. This component is a genuine OEM part designed to ensure optimal performance and compliance with emission standards for compatible Mazda vehicles. Please read this manual thoroughly before proceeding with installation or maintenance.
2. Safety Information
Always prioritize safety when working on any vehicle. Failure to follow safety precautions can result in injury or damage to the vehicle.
- Ensure the vehicle is turned off and the engine is cool before beginning any work.
- Wear appropriate personal protective equipment, such as gloves and eye protection.
- Refer to your vehicle's specific service manual for detailed instructions and torque specifications.
- If you are unsure about any step, consult a qualified automotive technician.
- Keep all tools and parts away from children.
3. Package Contents
Upon opening the package, verify that all components are present and undamaged.
- 1x Mazda KLG4-13-988 Vapor Canister Filter

Figure 1: The Mazda KLG4-13-988 Vapor Canister Filter. This image displays the black cylindrical filter unit with two hose connections on either end and a mounting bracket with two bolt holes on the underside. The Mazda logo is subtly embossed on the top surface.
4. Installation
The vapor canister filter is an integral part of your vehicle's Evaporative Emission Control (EVAP) system. Proper installation is crucial for the system's functionality and to prevent emission-related issues. Due to the specific nature of automotive systems, professional installation by a certified technician is highly recommended.
General Installation Steps (Consult Vehicle Service Manual for Specifics):
- Locate the Existing Filter: Identify the current vapor canister filter in your vehicle. Its location can vary by Mazda model and year, but it is typically found near the fuel tank or under the vehicle.
- Disconnect Battery: For safety, disconnect the negative terminal of the vehicle's battery.
- Relieve Fuel System Pressure: Follow your vehicle's service manual to safely relieve any pressure in the fuel system.
- Disconnect Hoses and Electrical Connectors: Carefully detach all hoses and electrical connectors from the old vapor canister filter. Note their positions for correct reattachment.
- Remove Old Filter: Unbolt or unclip the old filter from its mounting bracket.
- Install New Filter: Position the new Mazda KLG4-13-988 filter in the same location and secure it to the mounting bracket. Ensure it is oriented correctly.
- Reconnect Hoses and Electrical Connectors: Reattach all hoses and electrical connectors firmly. Double-check that all connections are secure to prevent leaks or malfunctions.
- Reconnect Battery: Reconnect the negative terminal of the battery.
- Test System: Start the vehicle and check for any warning lights or unusual odors. Perform a diagnostic scan if necessary to confirm proper EVAP system operation.
5. Operating Principle
The Mazda KLG4-13-988 Vapor Canister Filter is a passive component within the EVAP system. Its primary function is to filter ambient air entering the charcoal canister. This air is used to purge fuel vapors stored in the canister into the engine for combustion, preventing their release into the atmosphere. A clean filter ensures proper airflow for efficient purging and prevents contaminants from entering the canister, which could degrade its performance.
6. Maintenance
The vapor canister filter is generally designed for long-term use. However, its lifespan can be affected by environmental factors such as dust, dirt, and humidity. While there isn't a strict replacement interval for this specific filter, it is advisable to inspect it periodically, especially if you drive in dusty conditions or experience EVAP system-related issues.
Inspection:
- Visually inspect the filter for any signs of physical damage, cracks, or blockages.
- Check the hose connections for secure fitment and absence of leaks.
- If the filter appears excessively dirty or clogged, replacement may be necessary.
7. Troubleshooting
Issues with the vapor canister filter can sometimes manifest as EVAP system malfunctions. If you encounter any of the following, consider inspecting or replacing the filter:
- Check Engine Light (CEL): A common indicator of an EVAP system fault. Diagnostic trouble codes (DTCs) related to EVAP system leaks or purge valve issues might point to a clogged filter.
- Difficulty Fueling: If the fuel nozzle frequently clicks off before the tank is full, it could indicate a blockage in the EVAP system, potentially including the canister filter, preventing proper tank venting.
- Fuel Odor: While less common for a filter, a strong fuel odor could indicate a leak in the EVAP system, which should be investigated thoroughly.
Note: These symptoms can be caused by various components within the EVAP system. A professional diagnostic scan is recommended to accurately identify the root cause.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Mazda |
| Model Number | KLG4-13-988 |
| OEM Part Number | KLG4-13-988 |
| Product Grade | Replacement Part |
| Vehicle Service Type | Passenger Car |
| Item Weight | 0.01 Ounces (approx. 0.28 grams) |
| Product Dimensions | 6.3 x 5.91 x 5.51 inches (approx. 16 x 15 x 14 cm) |
| Style | Modern |
| Manufacturer | Mazda |
| First Available | June 10, 2014 |
9. Warranty and Support
As a genuine OEM part, this Mazda Vapor Canister Filter is typically covered by Mazda's standard parts warranty. For specific warranty terms and conditions, please refer to your vehicle's warranty documentation or contact an authorized Mazda dealership. For technical support or further assistance, please contact your local authorized Mazda service center.





