If only one brake pad is replaced during routine brake maintenance, the result is that __________.

When only one brake pad is replaced, it can lead to unequal braking performance between the wheels. Braking systems are designed to provide balanced force across all wheels to ensure stability and effective stopping power. If a new brake pad is installed on just one side, it will exhibit different friction characteristics and wear patterns in comparison to the older, possibly worn-out pad on the other side. This imbalance can cause the vehicle to pull to one side when braking, increasing stopping distances and potentially leading to unpredictable vehicle behavior. Therefore, it is essential for brake pads to be replaced in pairs to maintain uniform braking performance and safety.