Replace Mazda 3 Series Electronic Fuel Injection. Discover Mazda 3 Series Fuel Injection & Mazda 3 Series Multi-Point Fuel Injection. Maintaining the fuel injection system in your Mazda 3 Series is vital for peak performance and fuel efficiency. Regular cleaning can prevent build-ups that may clog the injector, and using high-quality fuel reduces the risk of deposits. Watch for signs like poor idle, diminished power, or increased fuel consumption, which could signal the need for a replacement. When selecting a new fuel injector, choose from options like throttle body, multi-port, or direct injection systems, each with benefits tailored to specific engine types. Ensure you opt for injectors made from durable materials to withstand the rigors of engine heat and chemicals, and consider professional installation to guarantee optimal function and longevity.