If you eventually plan to take all four parts of the exam, you can check all four boxes. After you pass one part of the exam you have 18 months to take and pass the other three parts. See the 18 month requirements below (How do I calculate the 18 months rolling window?).
Though you may not notice, as bulbs age they don't generate as much light as when they were new. That means your headlights may still work after five or six years, but they may not be as bright or illuminate as much of the road as they used to.
Since the batteries are entombÂ­ed, a dead or dying one requires the replacement of its entire sensor assembly. When asked how long the sensor batteries will last, industry representatives provide a broad life expectancy range â five to 12 years and up to 100,000 miles are mentioned when addressing estimated life spans.