{"data":[{"slug":"packaging-density","position":1,"title":"Packaging density","summary":"Modern engine bays fit more hardware into less room, so a job that once took an hour can start with removing other parts just to reach the one that failed.","example_count":2},{"slug":"routine-service-access","position":2,"title":"Routine service access","summary":"Oil changes, filters, and batteries are jobs you pay for again and again, so small hassles like undertrays, cartridge filter housings, glove box filter doors, and batteries moved under a seat add up over the life of a car.","example_count":2},{"slug":"timing-system-design","position":3,"title":"Timing system design","summary":"How an engine drives its camshafts decides whether timing work is a scheduled belt change, a part that lasts the life of the engine, or a major teardown, and some newer designs have made that choice more expensive.","example_count":2},{"slug":"turbocharging-and-downsizing","position":4,"title":"Turbocharging and downsizing","summary":"Small turbocharged engines give big-engine power with better rated fuel economy, but they run hotter, depend more on the right oil, and add parts that can fail.","example_count":2},{"slug":"transmissions","position":5,"title":"Transmissions","summary":"CVTs, dual-clutch units, and automatics with more gears improve rated fuel economy, but they are complex and sensitive to fluid, and many are sold as \"filled for life,\" which is where automaker and technician advice split.","example_count":2},{"slug":"electronics-and-software","position":6,"title":"Electronics and software","summary":"Jobs that used to need only hand tools now often end with a software step, such as telling the car it has a new battery, putting an electric parking brake into service mode, or recalibrating a driver assistance camera.","example_count":2},{"slug":"parts-and-labor-economics","position":7,"title":"Parts and labor economics","summary":"A repair bill often depends more on the labor time the guide assigns than on the part, and vehicles designed to be quick to assemble at the factory can be slow to take apart in a shop.","example_count":1},{"slug":"regulatory-pressure","position":8,"title":"Regulatory pressure","summary":"Emissions and fuel economy rules push automakers toward direct injection, exhaust aftertreatment, exhaust gas recirculation, cylinder deactivation, and smaller engines, and each one adds maintenance or repair exposure.","example_count":2},{"slug":"designed-for-service","position":9,"title":"Designed for service","summary":"Some vehicles still use proven layouts, keep dipsticks, and leave room around routine parts, and owners see the payoff in lower labor charges for the same jobs.","example_count":1}]}