Exclusionary vs named-component coverage
Exclusionary policies (the broader form) cover all mechanical and electrical components EXCEPT those specifically listed as excluded. Named-component policies cover only the parts listed in a coverage schedule.
Practical difference: an exclusionary policy covers your failed power-sliding rear door mechanism by default because it isn't on the exclusion list. A named-component policy only covers it if 'power sliding door motor and track' explicitly appears on the included parts list. For 2026, prefer exclusionary forms — they handle the obscure failures that drive most claim disputes.
What's covered on a standard exclusionary MBI
Major covered categories:
- Engine: cylinder block, heads, pistons, valves, valve train, oil/water pumps, turbo/supercharger, fuel injection, sensors
- Transmission: case, gears, clutch packs, torque converter, mechatronic units, control modules
- Drivetrain: drive shafts, axles, CV joints, differentials, transfer case, AWD/4WD actuators
- Electrical: alternator, starter, ECU, body control modules, ABS module, airbag control unit
- Climate: AC compressor, condenser, evaporator, blower motor, heater core
- Steering/Suspension: power steering pump and rack, shocks/struts (mechanical, not wear)
- Brakes: master cylinder, calipers, ABS components (NOT pads/rotors)
- Factory tech: infotainment, navigation, backup camera, parking sensors
Standard exclusions across all major MBI carriers
Universal exclusions on every major 2026 MBI policy:
- Wear-and-tear items: brake pads/shoes, tires, batteries, wipers, belts, hoses, light bulbs
- Routine maintenance: oil changes, tune-ups, filters, fluids, alignments, coolant flushes
- Cosmetic items: paint, body panels, upholstery, glass, trim, weatherstripping
- Accident, weather, theft, vandalism (those go through regular auto insurance)
- Damage from racing, off-road use, commercial use, modifications, neglect, abuse
- Pre-existing failures (waiting period protects against this)
Waiting periods and pre-existing conditions
Most MBI policies have a 30–60 day waiting period after enrollment before claims become eligible. The waiting period prevents people from buying MBI right before a known failure becomes a claim.
Pre-existing condition definition: a failure that began (or whose root cause began) before policy effective date. If your transmission was showing warning signs the week before you bought MBI and fails three months later, the carrier may still investigate and deny — they pull diagnostic history from dealer service records.
Deductible structures: per claim vs per visit
Standard MBI deductibles ($250 or $500) apply per claim, not per repair visit. If your check-engine light reveals three separate issues at the same shop visit — failed O2 sensor, failed thermostat, failed mass airflow sensor — that's one claim with one deductible.
Some lower-tier MBI policies and many dealer service contracts charge per visit or per component, which can double or triple your out-of-pocket on multi-issue repairs. Always confirm 'per claim' deductible structure before binding.
The MBI claim process — step by step
Standard 2026 claim process across all major carriers:
- 1. Take vehicle to a licensed repair shop (dealer or independent)
- 2. Shop diagnoses the failure and provides written estimate
- 3. Shop or you calls the MBI carrier for pre-authorization
- 4. Carrier reviews and approves (typically same day for clear claims)
- 5. Shop performs the repair using carrier-approved parts
- 6. Carrier pays the shop directly; you pay only your deductible at pickup