Lower Control Arm Bushing (with mounting ears) Mazda 3 2015-2019 OEM KR1134540

Lower control arm bushing Mazda 3 2015-2019 OEM KR1134540 is a front suspension component installed at the connection point between the control arm and the body or subframe. This part absorbs and reduces vibrations transmitted from the suspension to the body, while allowing the control arm to move properly during vehicle operation.

The control arm bushing works continuously when the vehicle accelerates, brakes, steers, or drives over speed bumps and uneven roads. When the bushing is in good condition, control arm movement is kept stable, helping the suspension operate smoothly and maintaining a firm steering feel.

Operating principle

As the vehicle moves, the wheel and control arm constantly generate movement as the road surface changes. The control arm bushing acts as an elastic connection point, allowing a certain amount of control arm movement while limiting vibrations and impacts from being transferred directly to the chassis.

When the vehicle brakes or accelerates, the control arm is subjected to forces from multiple directions. The control arm bushing helps control arm movement, maintain a stable relative position, and support the suspension system to work as designed.

If the bushing hardens, cracks, or deforms, its ability to absorb vibration and control control arm movement may be reduced, which can affect vehicle stability.

Design and quality

KR1134540 is the OEM part number used for the lower control arm bushing on the Mazda 3 2015-2019, according to the product information. The lower control arm bushing design with mounting ears allows direct replacement of the corresponding part when the old component has worn out.

The control arm bushing is a part that is constantly exposed to load, vibration, temperature, and road conditions. Using a replacement part with proper dimensions and design helps ensure the connection between the control arm and the body, while reducing vibration, noise, and abnormal suspension movement.

Signs of a damaged control arm bushing

Over time, the control arm bushing may age, harden, crack, or deform. Common signs include:

• Clunking, knocking, or rattling noises from the front underbody area.
• Vibration or a loose feeling when driving on rough roads.
• The vehicle feels slightly pulled in a different direction when braking or accelerating.
• The steering wheel may feel unstable.
• The suspension produces unusual noises when driving over potholes or speed bumps.
• The bushing shows cracks, tears, or deformation when inspected directly.
• The control arm has abnormal movement due to excessive play in the bushing.
• The tires may wear unevenly if related suspension components are affected.

Product information

• Product name: Lower control arm bushing Mazda 3 2015-2019
• Part number: KR1134540
• Brand: OEM
• Location: Control arm bushing / suspension system
• Vehicle model: Mazda 3
• Model years: 2015-2019
• Type: Lower control arm bushing, with mounting ears
• System: Front suspension

Functions and role

The control arm bushing plays an important role in the suspension system:

• Connects the control arm to the body or subframe.
• Limits vibrations and impacts transmitted to the body.
• Controls control arm movement.
• Helps maintain suspension stability.
• Helps reduce noise generated from underbody movement.
• Contributes to a firm and stable steering feel.

Key advantages

• KR1134540 part number: Easy to match when searching and replacing.
• With mounting ears design: Suitable for the corresponding control arm structure.
• OEM standard: Suitable for replacing a worn original part.
• Compatible with Mazda 3 2015-2019: According to product information.
• Helps reduce vibration: Helps limit vibration transmitted from the suspension to the body.
• Stabilizes the control arm: Helps control arm movement during operation.

Signs it should be inspected or replaced

Inspect the control arm bushing if the vehicle develops unusual noises from the front underbody area, especially when driving over potholes, speed bumps, or during braking and acceleration. Also check directly if the bushing is cracked, hardened, torn, or deformed.

For vehicles that have been used for a long time or frequently driven on rough roads, it is recommended to periodically inspect control arm bushings, ball joints, stabilizer links, and suspension joints to detect wear early.

👉 Lower control arm bushing Mazda 3 2015-2019 OEM KR1134540 is a suitable replacement for a hardened, cracked, or deformed control arm bushing, helping restore suspension connection and vibration damping. When ordering, match the KR1134540 part number, model year, and control arm structure to ensure the correct part.

Replacement recommendations

When replacing the control arm bushing, also inspect the entire front suspension system, including the control arm ball joint, tie rod end, stabilizer link, and related bushings. If the control arm or mounting point shows signs of bending or deformation after an impact, address the cause before installing the new bushing.

After completing the replacement, recheck the suspension and have the wheel alignment adjusted if removal and installation affected the position of the connected components.