Genuine Mazda Engine Air Filter – MX-5 Mk3 / NC • LFG1-13-Z40

Genuine Mazda LFG1-13-Z40 Engine Air Filter

Replacement Genuine Mazda engine air-filter element for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 / NC models with applicable 1.8L and 2.0L petrol engines listed in the compatibility table.

The rectangular panel filter fits inside the engine air-cleaner housing and removes dust, grit, pollen and other airborne contamination from the incoming air.

Correct filtration helps prevent abrasive debris from reaching the airflow sensor, throttle body, inlet manifold and internal engine components.

As contamination accumulates within the pleated filter media, intake airflow may become restricted. A heavily blocked filter can contribute to reduced throttle response, poor performance, increased fuel consumption or unusual intake noise.

This listing supplies one Genuine Mazda engine air-filter element, which is the quantity required per applicable vehicle.

• Part type: Engine air-filter element
• Mazda catalogue description: Element, air cleaner
• Alternative descriptions: Engine air filter / panel filter / air-cleaner element
• Primary function: Removes airborne contamination from engine intake air
• System: Engine air-intake system
• Fitting position: Inside the engine air-cleaner housing
• Primary vehicle application: Mazda MX-5 Mk3, Mk3.5 and Mk3.75 / NC
• Engine applications: Applicable 1.8L L8-family and 2.0L LF-VE petrol engines
• Transmission applications: Manual and automatic according to vehicle specification
• Filter design: Rectangular replaceable panel element
• Approximate equivalent-filter length: 300–305 mm
• Approximate equivalent-filter width: 161–163 mm
• Approximate equivalent-filter height: 39–45 mm
• Quantity required per vehicle: One
• Quantity supplied: One air-filter element
• Brand: Genuine Mazda
• Part No.: LFG1-13-Z40
• Also referenced as: LFG113Z40
• Mazda service-pack reference: LFG1-13-Z40-9A

Typical reasons for replacement:

• Routine engine servicing
• Filter media visibly blocked by dust or debris
• Filter element wet, oily, torn or distorted
• Reduced engine response or restricted airflow
• Increased fuel consumption
• Unusual intake noise
• Air-cleaner housing opened during intake-system repairs
• Vehicle regularly operated in dusty conditions
• Unknown filter age or service history

Fitment advice: This filter is used in the standard engine air-cleaner housing fitted to applicable Mazda MX-5 NC 1.8L and 2.0L petrol models.

Reference advice: LFG1-13-Z40-9A is the Mazda service-pack presentation of the same filter application. Packaging may therefore show the additional service suffix.

Service advice: Inspect the filter during routine servicing and replace it according to the vehicle service schedule and operating conditions. More frequent inspection may be appropriate where the vehicle is regularly driven in dusty or heavily polluted environments.

Inspection advice: Examine the full depth of the pleated media. Replace the filter if it is heavily discoloured, blocked, torn, distorted, wet or contaminated by oil.

Air-box advice: Remove loose leaves, grit and debris from the lower air-cleaner housing before installing the replacement filter. Prevent contamination from entering the clean side of the intake system.

Sealing advice: Confirm that the filter perimeter seal sits evenly within the air-cleaner housing. A folded, damaged or incorrectly positioned seal can allow unfiltered air to bypass the element.

Housing advice: Inspect the air-cleaner housing, retaining clips, intake ducting, breather connections and hose clamps for cracks, damage or loose connections.

Sensor advice: Avoid touching or contaminating the airflow sensor during servicing. Airflow-sensor contamination or an intake leak can produce symptoms similar to a restricted air filter.

Cleaning advice: This is a replaceable filter element. Do not wash it, soak it in cleaning fluid or apply filter oil.

Diagnostic advice: Reduced performance or increased fuel consumption can have several causes. Inspect the intake ducting, airflow sensor, throttle body, ignition system and fuel system where symptoms remain after filter replacement.

Other items to consider: Consider inspecting the intake hose, air-cleaner housing clips, breather hoses and airflow-sensor connection during the same service.

Useful tools / consumables: Basic hand tools where required, an inspection lamp and a vacuum cleaner or clean lint-free cloth for removing loose debris from the air box.

Difficulty guide: DIY Difficulty: Easy. Replacement normally requires opening the air-cleaner housing, removing the old element and fitting the new filter in the correct orientation.

Why Genuine Mazda? Genuine Mazda air filters are specified for the original air-cleaner housing dimensions, perimeter sealing arrangement, airflow requirements and filtration performance. Using the correct OE element helps prevent unfiltered air from bypassing the filter and maintains compatibility with the standard intake system.

What’s in the box: One Genuine Mazda engine air-filter element, part number LFG1-13-Z40. Air-cleaner housing, retaining clips, intake ducting and installation tools are not included unless specifically shown or stated separately.

Installation notes: Switch off the engine and allow it to cool. Release the air-cleaner housing clips or fasteners and lift the cover carefully. Remove the old filter and clean loose debris from the lower housing without allowing contamination into the clean intake passage. Fit the replacement element in the correct orientation, confirm that the perimeter seal is fully seated and close the housing securely. Check that all clips, hoses and electrical connections are properly fitted before starting the engine.