ASE A4 Suspension & Steering practice test
The A4 test blends hands-on steering and suspension repair with alignment theory — camber, caster, toe, and thrust angle reasoning decide a big share of the questions. Practice both the diagnosis and the geometry here.
A vehicle with hydraulic power steering requires high effort to steer during parking maneuvers. Technician A says a worn steering damper is the most likely cause. Technician B says a glazed, slipping pump drive belt can cause this complaint. Who is correct?
How the A4 test works
40 scored questions
+ ~10 unscored research questions
60 minutes
computer-based, at a test center
$62 per test
plus one $34 registration fee per order
Valid 5 years
then a shorter recertification test
ASE does not publish a fixed passing percentage — scores are scaled. Around 65–70% correct is the commonly cited range; aim above 80% in practice so you walk in with margin. The certificate is issued once ASE verifies your required work experience.
What the A4 test covers
The official task list for A4 Suspension & Steering breaks down into these content areas — the practice bank above draws from all of them:
- Steering system diagnosis and repair — play, wander, memory steer, EPS and hydraulic assist
- Suspension diagnosis and repair — ball joints, control arms, bushings, springs, and dampers
- Wheel alignment — camber, caster, toe, thrust angle, SAI, and pull/drift diagnosis
- Wheels and tires — wear patterns, vibration, balancing, and TPMS
Frequently asked
- How many questions are on the ASE A4 test?
- The A4 test has 40 scored questions plus about 10 unscored research questions, with a 60-minute time limit.
- Do I need to memorize alignment specs?
- No — the test asks you to reason with the angles: what excessive toe does to tires, which angle causes a pull, what SAI and included angle reveal about bent parts. Specs come from service data in real life.
- Is TPMS on the A4 test?
- Yes, tire pressure monitoring is part of the wheels-and-tires content: sensor types, relearn procedures, and service precautions.