Genuine Mazda Front Upper Suspension Arm / Wishbone – LH • N243-34-250

Genuine Mazda N243-34-250 Front Upper Suspension Arm / Wishbone – LH

Replacement Genuine Mazda left-hand front upper suspension arm for Mazda MX-5 Mk4 / ND and RF models from 2015 to 2025 listed in the compatibility table.

The front upper suspension arm, also known as the upper control arm or upper wishbone, connects the upper section of the left-hand front hub carrier to the vehicle structure. Its bushes and upper ball joint allow controlled suspension movement while maintaining the intended wheel position, camber geometry and steering response.

This arm plays an important role in controlling front-wheel movement under braking, acceleration and cornering loads. Correct suspension-arm geometry is also essential for stable handling, predictable steering and accurate wheel alignment.

This listing is for one complete Genuine Mazda left-hand front upper suspension arm assembly with its factory-installed bushes and upper ball joint. One N243-34-250 arm is fitted per vehicle on the front-left side.

Replacement may be required where the original arm has become bent following kerb or impact damage, heavily corroded, or has developed excessive movement in its bushes or ball joint. Possible symptoms include suspension knocking, vague steering, unwanted front-wheel movement, uneven tyre wear or difficulty achieving and retaining the correct wheel alignment.

• Part type: Front upper suspension arm / upper control arm / wishbone
• Primary use: Supports and locates the upper section of the left-hand front hub carrier
• Location: Left-hand front suspension assembly
• Position: Front left / left-hand side
• Body styles: Soft-top and RF / retractable fastback applications
• Included components: Factory-installed suspension bushes and upper ball joint
• Quantity per vehicle: One left-hand arm
• Quantity supplied: One complete left-hand upper arm assembly
• Brand: Genuine Mazda
• Part No.: N243-34-250
• Also referenced as: N24334250
• Corresponding right-hand arm: N243-34-200
• Fitment note: Left-hand front suspension component only; not interchangeable with the right-hand arm

Fitment advice: Confirm that the arm being replaced is in the left-hand front upper position and compare the original mounting arrangement before installation. Inspect the steering knuckle, arm mounting points, ball-joint connection and adjoining suspension hardware while the assembly is dismantled.

Other items to consider: When changing this part, you may also want to consider purchasing new upper-arm mounting bolts and nuts, the corresponding right-hand arm where both sides are worn, front lower suspension-arm components, anti-roll-bar links and any other corroded or worn suspension hardware identified during inspection.

Useful tools / consumables: Vehicle lift or suitable jack and axle stands, suspension support equipment, ball-joint separator, socket and spanner set, breaker bar, calibrated torque wrench, penetrating fluid and alignment markers.

Difficulty guide: DIY Difficulty: Moderate to Advanced. The suspension and hub carrier must be supported correctly, the upper ball joint separated carefully and potentially corroded mounting bolts removed. A complete wheel alignment should be carried out after installation.

Why Genuine Mazda? Genuine Mazda suspension arms are manufactured to the original dimensions, bush compliance, ball-joint geometry and mounting specifications. Using the correct OE arm helps retain factory steering response, suspension movement, alignment range and compatibility with the surrounding Mazda suspension components.

What’s in the box: One Genuine Mazda left-hand front upper suspension arm / wishbone assembly with factory-installed bushes and upper ball joint, part number N243-34-250. Mounting bolts and nuts are not included unless listed separately.

Installation notes: Support the hub carrier and suspension before removing the original arm. Note the location and orientation of all mounting hardware. Install the replacement arm and initially leave the bush-mounted fasteners finger-tight. Tighten bush-mounted bolts with the suspension at normal operating height unless the Mazda workshop procedure specifies otherwise. Tighten all fasteners to the applicable Mazda specification and complete a full four-wheel alignment after installation.