Genuine Mazda Underbody to Subframe Splash Guard – LH • N121-56-342

Genuine Mazda N121-56-342 Underbody to Subframe Splash Guard – LH

Replacement Genuine Mazda left-hand underbody splash guard for Mazda MX-5 Mk3.5 and Mk3.75 / NC facelift models with 1.8L and 2.0L petrol engines from 2009 to 2015 listed in the compatibility table.

The panel fits underneath the vehicle on the left-hand side, between the underbody area and front subframe assembly. It helps shield the subframe and adjoining mechanical components from road spray, stones, mud and general debris.

The splash guard also forms part of the original Mazda underbody panel arrangement, helping manage airflow beneath the vehicle and reducing direct exposure of the surrounding components to road contamination.

This listing supplies one Genuine Mazda left-hand underbody-to-subframe splash guard. One left-hand panel is fitted per vehicle. The corresponding right-hand panel, part number N121-56-341, is supplied separately.

Replacement may be required where the original panel has cracked, split, become distorted, pulled away from its mounting points or been damaged by road contact, accident damage or incorrect vehicle lifting.

• Part type: Underbody-to-subframe splash guard
• Primary use: Protects the subframe and adjoining underside components from road debris
• Location: Vehicle underside / front subframe area
• Position: Left-hand / LH
• Vehicle application: Mazda MX-5 Mk3.5 and Mk3.75 / NC facelift
• Engine applications: 1.8L L8-DE and 2.0L LF-VE
• Body applications: Soft-top and Roadster Coupe / PRHT
• Quantity per vehicle: One left-hand panel
• Quantity supplied: One splash guard
• Brand: Genuine Mazda
• Part No.: N121-56-342
• Also referenced as: N12156342
• Corresponding RH splash guard: N121-56-341
• Published MazSpec fitment: 2009-2015 facelift NC models

Fitment advice: This is the left-hand underbody panel. Compare the original panel shape, mounting-hole positions and surrounding underbody arrangement before installation. Some Mazda catalogue data may indicate compatibility with earlier NC vehicles, but the established MazSpec product application is restricted to 2009-2015 facelift models.

Other items to consider: When changing this part, you may also want to consider purchasing the corresponding right-hand splash guard, underbody clips, retaining screws, flange nuts, washers and any adjoining undertray or wheel-arch liner fasteners damaged during removal.

Useful tools / consumables: Plastic trim-removal tools, panel-clip pliers, socket set, screwdrivers, penetrating fluid for corroded metal fasteners and suitable lifting and vehicle-support equipment.

Difficulty guide: DIY Difficulty: Easy to Moderate. Installation requires safe access beneath the vehicle and removal of the original retaining clips or screws. Corroded, seized or damaged fixings may require additional care.

Why Genuine Mazda? Genuine Mazda underbody panels are manufactured to the intended profile, mounting-hole positions and surrounding component clearances. Using the correct OE panel helps restore the original protection, fit and underbody arrangement.

What’s in the box: One Genuine Mazda left-hand underbody-to-subframe splash guard, part number N121-56-342. Mounting clips, screws, nuts, washers and the right-hand panel are not included unless specifically shown or stated separately.

Installation notes: Raise and support the vehicle safely before beginning work. Remove damaged fixings and inspect the adjoining underbody and subframe mounting points. Position the replacement panel without forcing or bending it, install the correct clips and fasteners, and confirm that it is secure and clear of the exhaust, steering and suspension components.