1. This product is a non-new, disassembled motor assembly (untouched/no repairs performed), compatible with Dyson vacuum cleaners. Please verify your device model before purchasing to ensure compatibility. 2. All accessories have undergone functional tests to ensure normal operation. 3. Professional installation experience is required: Replacement requires disassembly tools and professional techniques. It is recommended to have professionals operate. 4. Motor fault diagnosis guide: -- No power/intermittent "stuttering" noise: Check for blockages in the cyclone or dirty filters first. If unresolved, the motor is likely faulty. -- Red-blue alternating lights/blue blinking indicator: This typically signals a motor malfunction. Replacement is necessary.
