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    Suspension arms and related components
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    FIRST LINE FIRST LINE FCA7135 Track Control Trailing Suspension Arm

    FIRST LINE FCA7135 Track Control Trailing Suspension Arm

    EAN: 5038068497123
    Product number: FCA7135
    EAN: 5038068497123

    FIRST LINE FCA7135 Track Control Trailing Suspension Arm

    EAN: 5038068497123

    £ 39,59
    In stock
    FIRST LINE FIRST LINE FCA7137 Track Control Trailing Suspension Arm

    FIRST LINE FCA7137 Track Control Trailing Suspension Arm

    EAN: 5038068497147
    Product number: FCA7137
    EAN: 5038068497147

    FIRST LINE FCA7137 Track Control Trailing Suspension Arm

    EAN: 5038068497147

    £ 285,59
    In stock
    FIRST LINE FIRST LINE FCA7138 Track Control Trailing Suspension Arm

    FIRST LINE FCA7138 Track Control Trailing Suspension Arm

    EAN: 5038068497154
    Product number: FCA7138
    EAN: 5038068497154

    FIRST LINE FCA7138 Track Control Trailing Suspension Arm

    EAN: 5038068497154

    £ 285,59
    In stock
    FIRST LINE FIRST LINE FCA7139 Track Control Trailing Suspension Arm

    FIRST LINE FCA7139 Track Control Trailing Suspension Arm

    EAN: 5038068497192
    Product number: FCA7139
    EAN: 5038068497192

    FIRST LINE FCA7139 Track Control Trailing Suspension Arm

    EAN: 5038068497192

    £ 170,39
    In stock
    FIRST LINE FIRST LINE FCA7140 Track Control Trailing Suspension Arm

    FIRST LINE FCA7140 Track Control Trailing Suspension Arm

    EAN: 5038068497208
    Product number: FCA7140
    EAN: 5038068497208

    FIRST LINE FCA7140 Track Control Trailing Suspension Arm

    EAN: 5038068497208

    £ 170,39
    In stock
    FIRST LINE FIRST LINE FCA7141 Track Control Trailing Suspension Arm

    FIRST LINE FCA7141 Track Control Trailing Suspension Arm

    EAN: 5038068497260
    Product number: FCA7141
    EAN: 5038068497260

    FIRST LINE FCA7141 Track Control Trailing Suspension Arm

    EAN: 5038068497260

    £ 32,39
    In stock
    FIRST LINE FIRST LINE FCA7142 Track Control Trailing Suspension Arm

    FIRST LINE FCA7142 Track Control Trailing Suspension Arm

    EAN: 5038068497277
    Product number: FCA7142
    EAN: 5038068497277

    FIRST LINE FCA7142 Track Control Trailing Suspension Arm

    EAN: 5038068497277

    £ 65,99
    In stock
    FIRST LINE FIRST LINE FCA7143 Track Control Trailing Suspension Arm

    FIRST LINE FCA7143 Track Control Trailing Suspension Arm

    EAN: 5038068497284
    Product number: FCA7143
    EAN: 5038068497284

    FIRST LINE FCA7143 Track Control Trailing Suspension Arm

    EAN: 5038068497284

    £ 65,99
    In stock
    FIRST LINE FIRST LINE FCA7144 Track Control Trailing Suspension Arm

    FIRST LINE FCA7144 Track Control Trailing Suspension Arm

    EAN: 5038068497314
    Product number: FCA7144
    EAN: 5038068497314

    FIRST LINE FCA7144 Track Control Trailing Suspension Arm

    EAN: 5038068497314

    £ 49,19
    In stock
    FIRST LINE FIRST LINE FCA7145 Track Control Trailing Suspension Arm

    FIRST LINE FCA7145 Track Control Trailing Suspension Arm

    EAN: 5038068497321
    Product number: FCA7145
    EAN: 5038068497321

    FIRST LINE FCA7145 Track Control Trailing Suspension Arm

    EAN: 5038068497321

    £ 49,19
    In stock
    FIRST LINE FIRST LINE FCA7146 Track Control Trailing Suspension Arm

    FIRST LINE FCA7146 Track Control Trailing Suspension Arm

    EAN: 5038068497482
    Product number: FCA7146
    EAN: 5038068497482

    FIRST LINE FCA7146 Track Control Trailing Suspension Arm

    EAN: 5038068497482

    £ 35,99
    In stock
    FIRST LINE FIRST LINE FCA7148 Track Control Trailing Suspension Arm

    FIRST LINE FCA7148 Track Control Trailing Suspension Arm

    EAN: 5038068497802
    Product number: FCA7148
    EAN: 5038068497802

    FIRST LINE FCA7148 Track Control Trailing Suspension Arm

    EAN: 5038068497802

    £ 41,99
    In stock
    FIRST LINE FIRST LINE FCA7149 Track Control Trailing Suspension Arm

    FIRST LINE FCA7149 Track Control Trailing Suspension Arm

    EAN: 5038068497819
    Product number: FCA7149
    EAN: 5038068497819

    FIRST LINE FCA7149 Track Control Trailing Suspension Arm

    EAN: 5038068497819

    £ 47,99
    In stock
    FIRST LINE FIRST LINE FCA7150 Track Control Trailing Suspension Arm

    FIRST LINE FCA7150 Track Control Trailing Suspension Arm

    EAN: 5038068497888
    Product number: FCA7150
    EAN: 5038068497888

    FIRST LINE FCA7150 Track Control Trailing Suspension Arm

    EAN: 5038068497888

    £ 25,19
    In stock
    FIRST LINE FIRST LINE FCA7151 Track Control Trailing Suspension Arm

    FIRST LINE FCA7151 Track Control Trailing Suspension Arm

    EAN: 5038068497987
    Product number: FCA7151
    EAN: 5038068497987

    FIRST LINE FCA7151 Track Control Trailing Suspension Arm

    EAN: 5038068497987

    £ 183,59
    In stock
    FIRST LINE FIRST LINE FCA7152 Track Control Trailing Suspension Arm

    FIRST LINE FCA7152 Track Control Trailing Suspension Arm

    EAN: 5038068497994
    Product number: FCA7152
    EAN: 5038068497994

    FIRST LINE FCA7152 Track Control Trailing Suspension Arm

    EAN: 5038068497994

    £ 183,59
    In stock
    FIRST LINE FIRST LINE FCA7153 Track Control Trailing Suspension Arm

    FIRST LINE FCA7153 Track Control Trailing Suspension Arm

    EAN: 5038068498007
    Product number: FCA7153
    EAN: 5038068498007

    FIRST LINE FCA7153 Track Control Trailing Suspension Arm

    EAN: 5038068498007

    £ 110,39
    In stock
    FIRST LINE FIRST LINE FCA7154 Track Control Trailing Suspension Arm

    FIRST LINE FCA7154 Track Control Trailing Suspension Arm

    EAN: 5038068498014
    Product number: FCA7154
    EAN: 5038068498014

    FIRST LINE FCA7154 Track Control Trailing Suspension Arm

    EAN: 5038068498014

    £ 110,39
    In stock
    Control Arm

    Control Arm

    Control Arms Explained

    Control arms are essential suspension components linking the wheel hub to the vehicle frame. They control wheel motion, maintain alignment, and contribute to ride comfort and handling. This guide covers common types, how they’re fitted, inspection, symptoms of wear, and best practices for replacement.

    Visual Examples of Control Arms & Links
    Control arm close-up example
    Track control arm between chassis and wheel
    Performance control arm illustration
    Suspension link assembly

    These images show various control arm designs and their role in linking the chassis to the wheel; they illustrate typical shapes and mounting orientations.

    Types of Control Arms

    Lower Control Arm

    Supports the bottom of the wheel hub, often carries most load. Common on MacPherson strut and double wishbone setups.

    Upper Control Arm

    Used in double wishbone suspensions; works with lower arm to locate the wheel vertically and control camber.

    Wishbone / A-Arm

    Triangular-shaped arm providing stable geometry; may be upper or lower. Common in performance and luxury vehicles.

    Trailing Arm

    Mounts longitudinally, controlling fore-and-aft wheel movement; often used in rear suspensions.

    Multi-Link Arm

    Consists of several links working together for refined wheel control and separation of forces—common in advanced rear or front setups.

    How Control Arms Are Fitted

    Control arms are connected between the chassis/subframe and the wheel hub assembly. Key interface components:

    • Bushings: Rubber or synthetic mounts that isolate vibration and allow limited movement while maintaining alignment.
    • Ball Joints: Spherical bearings enabling steering and vertical motion; often integrated into control arms or connected as separate joints.
    • Mounting Bolts: Secured to the chassis and knuckle; torque specifications must be followed to avoid geometry distortion.
    • Alignment Components: Some control arms include adjustment points; replacing them often necessitates a full wheel alignment.
    Installation Notes
    • Always lift and support the vehicle securely before working on suspension.
    • Replace control arms with the suspension in the correct unloaded or specified position to avoid preloading bushings.
    • Torque all fasteners to manufacturer specifications; loose or over-torqued bolts affect geometry and wear.
    • After installation, perform wheel alignment (toe, camber, caster) to restore handling characteristics.
    Inspection & Replacement Criteria

    Regular inspection of control arms should be part of routine suspension maintenance—typically every service interval or when symptoms appear.

    Check for:
    • Worn or cracked bushings allowing excessive movement.
    • Loose, damaged, or seized ball joints.
    • Corrosion or structural damage to the arm.
    • Unusual tire wear patterns indicating alignment drift.
    • Clunking noises over bumps or during acceleration/deceleration.

    When to replace: Replace control arms if bushings or ball joints show significant play, if the arm is bent/damaged, or if alignment cannot be maintained. Best practice is replacing both sides on the same axle for symmetry.

    Common Symptoms of Worn Control Arms
    • Steering wander or poor tracking on straight roads.
    • Uneven tire wear (camber or toe related).
    • Clunking, knocking, or creaking noises during suspension travel or turning.
    • Vibration through the steering wheel at speed.
    • Loose or vague steering feel.
    Consequences of Ignoring Wear

    Failing control arms can lead to compromised handling, accelerated tire wear, and in severe cases, loss of wheel control—posing safety risks.

    Best Practices & Tips
    • Replace control arms in pairs to keep suspension geometry balanced.
    • Inspect adjacent components (tie rods, sway bar links, wheel bearings) when changing control arms.
    • Use quality replacement parts; upgraded variants can extend service life.
    • After installation always perform a wheel alignment and test drive at low speed before regular use.
    ⚠️ Important:
    Incorrect installation or neglecting alignment after control arm replacement can degrade handling and accelerate wear. Always follow vehicle manufacturer torque settings and alignment procedures.
    Control Arms: Foundation of Stable Suspension

    Understanding control arm types, proper fitment, timely inspection, and replacement keeps your vehicle safe, predictable, and comfortable. Regular checks and using quality components prevent breakdowns and extend overall suspension life.

    Use this guide as part of scheduled maintenance and diagnostics for steering and suspension systems.

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