1. Function of the Control Arm Bushing

A control arm bushing is a rubber-metal joint that connects the suspension arm to the chassis. Its design determines how the suspension responds to forces during braking, acceleration, steering, and road impacts.

The main functions include:

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1) Reduce NVH (Noise, Vibration, Harshness)

The rubber layer absorbs high-frequency vibration and road shocks, preventing harshness from entering the cabin. This greatly improves ride comfort.

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2) Prevent Metal-to-Metal Impact

Without a bushing, the control arm and chassis would strike each other directly, causing:

• Noise

• Damage

• Steering instability

The bushing ensures elastic isolation.

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3) Maintain Suspension Geometry

By allowing controlled deformation, the bushing keeps critical angles stable:

• Toe

• Caster

• Camber

This is essential for consistent handling.

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4) Improve Handling & Stability

High-quality bushings provide:

• Precise steering response

• Stable braking

• Better cornering

• Reduced body roll

In summary: The bushing is the foundation of suspension comfort AND handling stability.

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2. Product Overview: OEM 2023336414

Fits the following Mercedes-Benz models

• W202: C180, C200, C220, C230, C280, C36 AMG

• R170: SLK 200, SLK 230, SLK 320

Installation Position

• Front Lower Control Arm – Rear Bushing
  This location absorbs heavy longitudinal forces during braking and acceleration.

Comparison with Cross-Reference Parts

Common equivalents include:

• 2023336414

• A2023336414

• 202 333 64 14

• 2023334814 (interchangeable in some models)

Advantages over aftermarket replacements

• Improved rubber thickness

• Better NVH tuning

• Enhanced bonding strength

• Superior oil & aging resistance

• Longer service life

• OEM-level dimensional accuracy

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3. Structure & Material Analysis

A high-quality Mercedes W202 bushing must deliver precise geometry control and wear resistance. The structure includes:

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1) Inner Sleeve (Metal Inner Tube)

• Steel with anti-corrosion treatment

• Connects to the control arm bolt

• Must remain dimensionally stable under high torque

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2) Outer Shell

• Thick-wall steel tube

• Phosphated or electrophoretic coated to prevent rust

• Designed for tight press-fit into the control arm housing

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3) Rubber Layer (Functional Core)

Rubber Material Options

Typical Rubber Performance

• Hardness: 60–75 Shore A

• Temperature Range: –40°C to +120°C

• Oil Resistance: Medium to high (NBR-focused formulas)

• Aging/Ozone Resistance: >1000 h without cracking

Bonding & Vulcanization Process

• Chemical adhesive + high-temperature vulcanization

• Bonding strength 30–50% higher than standard aftermarket bushings

• Ensures long-term stability under torsion

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4. Common Failure Symptoms (Detailed)

After years of service, especially beyond 80,000–120,000 km, control arm bushings begin to degrade.

1) Steering Pull / Vehicle Drifting

Rubber deformation alters suspension geometry, causing the vehicle to pull left/right.

2) Braking Dive

The rear bushing controls longitudinal force. Once worn, heavy nose dive occurs.

3) Clunking or Creaking Noises

Occurs during:

• Low-speed bumps

• Parking maneuvers

• Acceleration or braking

4) Vibrations or Steering Wheel Shake

Loose bushings allow excessive control arm movement.

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How to Check if the Bushing Needs Replacement

✔ Visual Inspection

• Cracks

• Torn rubber

• Separated (debonded) rubber

• Unusual deformation

✔ Pry Bar Test

Move the arm with a lever; excessive play = worn bushing.

✔ Driving Symptoms

• Instability

• Noise

• Jerking during gear shifts

• Poor alignment retention

Any of these signs indicate the need for a C180 suspension bushing replacement.

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5. Installation & Maintenance Guide

Proper installation determines over 50% of the bushing’s lifespan.

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1) Press-Fit Direction

• Must match the factory-installed orientation

• Do NOT hammer the bushing

• Use professional tools only

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2) Preload (Pre-Tightening Angle) – Critical

The control arm must be at ride height when tightening bolts.

If bolts are tightened at full droop:

• Rubber becomes twisted

• Premature cracking occurs

Always tighten with:

• Vehicle on wheels, or

• Using a suspension support tool

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3) Bolt Torque (Placeholder)

Control Arm Rear Bushing Bolt Torque: XX–XX Nm (per service manual)

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4) Installation Tips

• Clean bore surface

• Do not grease rubber (use assembly lube only if required)

• Ensure perfect centering

• Perform alignment after installation

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6. Manufacturing Advantages of Hebei Huami New Material Technology Co., Ltd.

Based on the company's official profile, Huami has strong R&D and production advantages, making its 2023336414 bushings suitable for OEM-level replacement.

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1) Advanced Rubber Compounding Capability

• 100+ R&D personnel

• In-house special rubber formulation technology

• Custom formulas available:

• Sport/Hard version

• Comfort version

• Oil-resistant/NBR version

• High-temperature version

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2) Precise Mold Design & Dimensional Uniformity

• In-house mold production

• High concentricity and roundness

• Ensures accurate fitment for Mercedes W202 control arm housings

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3) Full Laboratory Testing Capability

Includes:

• Hardness (Shore A)

• Tensile & tear strength

• Bonding strength

• Compression set

• Dynamic fatigue testing

• Salt spray resistance

• Aging and ozone tests

Ensures long life and OEM-grade stability.

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4) International Certifications

(Available based on product line)

• IATF16949

• TÜV

• ISO9001 / 14001 / 45001

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5) Reliable Production Capacity & Export Advantage

• Over 600 employees

• AEO Advanced Certification for export efficiency

• Supports small-batch customization

• High consistency suitable for European aftermarkets

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7. Specifications Table

(Provide dimensions if you’d like me to fill exact values.)

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8. FAQ 

1. Which vehicles does the 2023336414 bushing fit?

Mercedes-Benz W202, C180, C200, C36 AMG, and SLK R170.

2. How long does a control arm bushing last?

Typically 80,000–150,000 km depending on conditions.

3. What are signs of a worn control arm bushing?

Noise, vibration, braking instability, cracked rubber.

4. Can I replace the bushing myself?

Requires a press—professional installation is recommended.

5. Why does the bushing need preload tightening?

Prevents rubber twisting and premature failure.

6. Do you offer sport or heavy-duty versions?

Yes, hardness and material can be customized.

7. Is this bushing oil-resistant?

NBR-based oil-resistant versions are available.

8. Do I need a wheel alignment after replacement?

Yes—geometry changes slightly after installation.

9. Is the product suitable for European climates?

Yes—rubber formulas are optimized for oil, heat, and aging resistance.

10. Do you support export?

Yes—AEO Advanced Certification ensures fast customs clearance.