How often does this part fail a real inspection, by car age?

In 2,091,272 New Jersey initial inspections in 2025, 5.1% of cars aged 16+ years failed the lighting test against 0.3% of cars under 3 years, about 17 times as often (record counts, not a sample).

New Jersey lighting test: share of initial inspections failed, by the age of the car (2025 tests)

What it shows: 16+ is the largest at 5.1%, followed by <3 at 0.3%; the smallest shown is <3 at 0.3%.

Source: New Jersey Motor Vehicle Commission, Vehicle Inspection Data · file downloaded 2026-10

Data and chart by CalcScrape: Tail Light Replacement