BMW E87 Juddered at Low Speed: Corrosion Made the ABS Ring Touch the Sensor Once Per Turn

Follow a BMW E87 low-speed judder from one frequency dropout per wheel turn to a corrosion-swollen ABS pickup ring.

Follow a BMW E87 low-speed judder from one frequency dropout per wheel turn to a corrosion-swollen ABS pickup ring.

Separate a Vauxhall Vectra's original ECU-related no-crank from a second no-start introduced by a noisy reconditioned starter.

See how physically compatible but electrically wrong 44-pole rear hubs caused low-speed ABS intervention on a Subaru Legacy.

Follow a Mazda CX-3 no-audio complaint from a hidden U0184 and biased local CAN to a DAB amplifier that pulled the entertainment network down.

See how a 2007 Honda CR-V's full-throttle surge was traced to an aftermarket fuel-rail tuning box rather than a failed high-pressure fuel system.

Follow a 2015 Mazda3's bump-triggered warning storm and tachometer loss to a loose front-camera connector that divided the CAN.

See how a 2009 Renault Clio DF007/DF885 and excessive rail pressure survived a regulator replacement before pump damage and filings were found.

See why multiple VVT parts did not cure a Toyota Camry P0016 and how dynamic timing evidence exposed eccentric idler-sprocket wear.

Preserve the first cold minute in a Fiat 500 TwinAir misfire case where intake-pulse evidence revealed a sticking inlet-valve actuator.

Follow the evidence from a BMW i3 drivetrain warning and no-READY state to a broken low-voltage Terminal 30C wire beneath the battery carrier.