Electric fuel pumps are usually more durable and can last longer than mechanical ones because of their design and where they are placed. With modern electric fuel pumps, since it is submerged in the fuel tank (and being surrounded by liquid), this keeps the pump cool during operation and will not cause overheating. That usually stretches their life into 100k-150k miles, others even go beyond that, but requires proper maintenance. In contrast, mechanical fuel pumps (which are usually camshaft driven and mounted outside of the tank) are more susceptible to wear and typically need a replacement after 60,000 to 80,000 miles.
Greater accuracy of electric gasoline pumps additionally contribute to increased longevity in the fuel pumps themselves. Electric pumps, on the other hand, are made to maintain a more-or-less steady fuel pressure (usually within that 40 to 60 psi range) and adequately feed fuel-injected engines around different road or driving conditions. In comparison, mechanical pumps---which deliver at lower pressures literally not maintain the same consistent flow---in high‐demand situations that will wear over time.
Good fuel quality and regular maintenance will also affect the service life of your electric fuel pumps. The pump has to work hard and with blockages, burning it out faster if you use low-quality or polluted fuel leading to sediment buildup. Fuel filters should be replaced every 30,000 miles to aid filter out pollutants that could also clog the pump and its elements. This also helps as the pump is then submerged in fuel and cooling efficiency remains high, which in turn reduces wear.
Automobile pioneer Henry Ford once famously said, “Before everything else, getting ready is the secret of success” And as the saying goes, you get what you pay for — so if there are better Fuel Pump parts to be found, why should you have to scrimp and save on a fractionally more important part? Most modern vehicles use electric fuel pumps, which remain in-tank and are capable of providing extended life because they are more reliable (no longer have the internal component climb that caused them to wear out earlier).