Rotors should be resurfaced or replaced to ensure proper performance [Quizlet 1.2.1]. 4. Tips to Pass the Test
Searching by Year, Make, and Model (YMM) is standard, but searching by the 17-digit Vehicle Identification Number (VIN) eliminates catalog errors caused by mid-year production changes or split engine options.
Monitor exhaust stream oxygen levels. A faulty sensor can lead to catalytic converter failure due to unburned fuel.
Helps the ECU determine crankshaft rotation for ignition and fuel injection timing. Fuel Systems: Autozone Parts Expert Test Answers
Earning Your Patch: The Ultimate Guide to AutoZone’s Parts Expert Test
Safety components require absolute accuracy when looking up parts.
Focus on battery and starting systems. Learn how to use the BOSS (Battery and Oil System Saver) tester and interpret results. Rotors should be resurfaced or replaced to ensure
Extreme heat is the #1 cause of failure. About 50% of batteries returned under warranty are actually just discharged, not defective. Brake Systems:
What should you do first when testing an alternator?
A thermostat sticking open causes the engine to run cold, triggering a check engine light (P0128) and reducing fuel efficiency. Sticking closed causes rapid overheating. Monitor exhaust stream oxygen levels
You do not need to be a master mechanic to pass the test, but you must understand how different automotive parts interact. The test features scenario-based questions where a customer describes a symptom, and you must identify the failing component. 1. The Electrical System (The Big Three)
Loose steering or uneven tire wear usually indicates worn outer/inner tie rods or ball joints. 3. Electrical Systems, Batteries, and Charging
: Understanding the difference between ceramic and semi-metallic pads, identifying tapered wear caused by sticking calipers, and knowing why rotors should be replaced or resurfaced with new pads.