My warranty is almost up but they are telling me one of my manifolds is leaking (not sure which, they didn't specify) and I needed to change my timing belt... I'm not sure if either of these would be dealt with under the powertrain. I drive an '03 Mazda Speed Protege. Any help would be appreciated.
Typically, a powertrain warranty would cover the engine, transmission, transaxle (for 4-wheel or all-wheel drive) and differential (for rear-wheel drive.) It is much more limited than a bumper-to-bumper warranty.
The exhaust manifold will definitely be covered by an emissions warranty - either a Federal or California emissions requirement. I would expect that the intake manifold, MAP sensor and throttle body components should be also covered under the emission manifold, but I am not 100% certain. Also covered under emissions warranty are the oxygen sensors and catalytic converter.
The timing belt is usually considered a maintenance 'wear item' that should be replaced at a year or mileage timepoint (e.g. 7 years or 100K miles - check your owner's manual.) (Other wear items would include break pads, tires, clutch and windshield wipers.) If your timing belt is worn out during the warranty period, I would push for the dealer or manufacturer to pay for free replacement.
If you have any problems, check your with your state's Dept of Motor Vehicles, or Bureau of Automotive Repair for specific regulations.
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