2012 Toyota 4runner Fuel System Other Problems

Your 4Runner unexpectedly slows down from highway speed (70-75 mph) to 40 mph without warning, then speeds back up again. This has happened multiple times over the past 3-4 months and created a safety hazard when a truck nearly hit you from behind. A shop diagnosed the problem as a failing fuel pump, though your dealer initially couldn't identify the cause. While Toyota has issued recalls for fuel pump problems on 2013-2020 models, your 2012 isn't covered. Fixing this will likely require fuel pump replacement or repair.