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Automotive Service · A4

ASE Suspension & Steering Practice Test

ASE Suspension & Steering (A4) practice focuses on diagnosing and servicing ride, handling, and steering concerns. The question bank samples practical decisions involving suspension springs and joints, wheel alignment, steering linkages, hydraulic and electric power steering, and related tire and wheel systems.

Exam overview

Exam providerNational Institute for Automotive Service Excellence
Exam codeA4
CategoryAutomotive Service

About the ASE Suspension & Steering Exam

Suspension and steering work requires separating the cause of a vehicle symptom from conditions that can distort diagnosis. Practice questions address checking ride height and tire condition before alignment, recognizing how a broken stabilizer-bar link affects handling, and deciding when a loose ball joint or cracked spring calls for repair. Other scenarios involve steering effort and feel, including a wobbling power-steering pump pulley, rough steering rotation, and inadequate charging-system voltage in an electric-assist system. Questions also sample service precautions for height-adjustable air suspension and care around wheel-mounted tire-pressure sensors. Use these situations to connect inspection findings to safe next steps, confirm basic conditions before adjusting alignment, and distinguish mechanical faults from assist-system or tire-related causes.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A technician is servicing a vehicle with a height-adjustable air suspension. What should be done before working beneath or disconnecting components of the system?

  1. ADisable or depressurize the system as specified by the vehicle maker and support the vehicle safely
  2. BOpen a brake bleeder to lower the suspension
  3. CDisconnect the steering tie rods while the vehicle is unsupported
  4. DRaise the suspension to its maximum height and rely on the air springs
Show answerCorrect answer: A

Air-suspension systems can change height unexpectedly and may contain pressurized components. Follow the specified shutdown or depressurization procedure and use approved supports before service.

Question 2

A technician is inspecting a tire pressure monitoring system after a wheel service. What is a sound general practice when a wheel-mounted pressure sensor may be present?

  1. AUse the specified service procedure and appropriate tools to avoid damaging the sensor
  2. BRemove the sensor before every tire rotation
  3. CIncrease tire pressure until the warning lamp turns off
  4. DReplace the wheel bearing whenever the sensor warning appears
Show answerCorrect answer: A

Wheel-mounted TPMS sensors can be damaged during tire removal or installation. The vehicle-specific service procedure, sensor location, and appropriate tools help prevent damage and support correct relearning where required.

Question 3

A vehicle uses hydraulic power steering. The pump pulley visibly wobbles while the engine is running. Which concern is most appropriate to address before evaluating steering-assist performance further?

  1. APulley or pump-shaft alignment or damage
  2. BRear tire tread depth
  3. CSteering-wheel trim condition
  4. DExhaust-system hanger position
Show answerCorrect answer: A

A wobbling pulley can indicate pulley damage, incorrect installation, or a problem at the pump shaft. It can disturb belt operation and damage components, so it should be inspected and corrected using the applicable service procedure.

Question 4

A vehicle’s steering wheel has a rough, notchy feel at several points during rotation. The steering linkage and front suspension joints move freely. Which inspection is a reasonable next step?

  1. ACheck the steering column and intermediate shaft for binding
  2. BReplace both rear shock absorbers
  3. CAdjust the tire pressure until the notches disappear
  4. DIncrease the engine idle speed
Show answerCorrect answer: A

Binding in the steering column or intermediate shaft can create a notchy feel even when external linkage joints are free. Inspect components through their full range of travel according to service procedures.

Question 5

A technician measures a vehicle’s ride height and finds one side below the manufacturer’s specification. The springs and tires are the correct parts and sizes. What should be checked before attempting to correct alignment?

  1. AThe wheel-speed sensor air gap
  2. BThe suspension for a weak or sagging spring
  3. CThe brake-fluid level
  4. DThe steering-wheel clock spring
Show answerCorrect answer: B

Ride height affects suspension geometry and alignment readings. A weak or sagging spring can lower one side, so the cause should be identified and corrected before alignment adjustments are made.

Question 6

After a wheel alignment, the steering wheel is centered but the vehicle still drifts on a flat, straight road. Which basic condition should be verified before attributing the drift to alignment?

  1. ATire pressures are set to the specified values
  2. BThe windshield washer reservoir is full
  3. CThe exhaust pipe is centered in its hanger
  4. DThe rear-seat head restraints are raised
Show answerCorrect answer: A

Unequal or incorrect tire pressures can affect rolling resistance and directional behavior. Verify pressures and other basic tire conditions before drawing conclusions from alignment measurements; follow the manufacturer’s diagnostic guidance.

Question 7

During an inspection, a stabilizer-bar link is found broken. Which symptom is most likely to increase?

  1. ABody roll during cornering
  2. BEngine vibration at idle
  3. CBrake-pedal travel during straight-line braking
  4. DSteering-wheel effort only while parked
Show answerCorrect answer: A

The stabilizer bar and its links help resist side-to-side body roll in turns. A broken link can reduce that assistance and make body roll more noticeable.

How to use this practice test

Access the free A4 practice bank for a session of up to 20 randomly selected questions from its 50 published questions. After the session, review your results and use missed or uncertain items to identify which suspension, steering, alignment, or service-safety concepts need more work.

Preparation tips

  • Compare measured ride height with manufacturer specifications and check for sagging, damaged, or incorrect springs before pursuing alignment adjustments.
  • Practice tracing steering complaints through the linkage and joints, steering gear, pump and pulley, or electric-assist power supply, based on the symptom and inspection findings.
  • Review the effects of worn or damaged ball joints, stabilizer-bar links, and springs on vehicle control, and identify when a component exceeds its service limit.
  • Before servicing height-adjustable air suspension, follow the system’s specified pressure-release and support procedure; keep clear of unsupported components.
  • When removing or installing wheels, account for possible wheel-mounted TPMS sensors and use procedures that avoid sensor damage.
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