Live misfire counter on scan tool during loaded acceleration

Coil-on-plug swap to isolate cylinder contribution

Brake pad thickness measurement - left vs right

Blue rotor discoloration from sustained heat

Cooling system pressure gauge holding test

Dried coolant residue at hose clamp joint

Parasitic draw ammeter on battery negative lead

Upper radiator hose hot - lower hose cold at thermostat

Active oil drip at valve cover gasket edge

Tire RFV measurement on road-force balancer

Audi expansion tank crust and low coolant level

Road test log noting vibration speed range

Water pump weep hole residue on undercar shield

Hybrid rear brake pad depth gauge reading

Battery CCA tester result sheet on cold morning

Alternator charging voltage at idle after start

Failed component staged after customer approval

Technician documenting finding on repair order

Scan tool freeze frame saved to case file

Bay photo of verified failure before parts install