Munroe shocks last pretty long for vehicles that use them. However, nothing lasts forever, especially mechanical equipment or components that are subject to wear and tear over time. Munroe shocks last up to 50,000 miles before you need to replace them. This estimated lifespan is for vehicles that you drive daily, rather than a once-in-a-while use. So, if you use Munroe shocks in your car and drive every day, you can be sure of the shock absorbers staying active until 50,000 miles. Meanwhile, after 50,000 miles, the shock absorbers start to degrade.