TECH ARTICLES

Suspension Service Has Changed

Modern vehicles rely on ADAS lane-keeping assist, adaptive cruise control, and automatic emergency braking. These systems depend on precise vehicle geometry and sensor calibration. Suspension service is no longer an isolated repair; it plays a direct role in ensuring ADAS systems operate as intended.

The Key Link: Vehicle Geometry

ADAS sensors (cameras, radar, steering inputs) are calibrated to factory-defined parameters. Even a few millimeters of ride height variation can alter:

• Camera viewing angle and radar targeting zone
• Object detection distance and lane-keeping accuracy

Suspension components directly influence this geometry — and therefore, ADAS performance.

Where Complete Strut Assemblies Fit In

A complete strut assembly directly influences several critical geometric factors:

• Ride height, determined by coil spring characteristics
• Damping behavior, which affects pitch under braking and acceleration
• Alignment angles, shaped by strut positioning and manufacturing tolerances

This is why strut replacement is typically followed by a wheel alignment and, in many cases, ADAS recalibration.

The Real Risk: Deviation from OE Specs

The risk is not replacement itself; it’s deviation from OE specifications. Common sources include different spring rates, inconsistent damping, and loose fitment tolerances. These can cause lane-keeping instability and sensor drift with no warning light or fault code.

Critical Step: ADAS Recalibration

Recalibration is required whenever suspension components are replaced, ride height changes, or a wheel alignment is performed:

• Static calibration: in-shop with fixed target boards
• Dynamic calibration: under controlled driving conditions

Skipping recalibration creates safety risks that produce no warning indicators. Quality components support the system; calibration ensures it works.