What could indicate a problem with fuel injectors?

An uneven engine idle is a key indicator of potential issues with fuel injectors. Fuel injectors are responsible for delivering the correct amount of fuel into the engine's combustion chamber. When they malfunction, whether due to clogging, leaking, or failure to open and close properly, the air-fuel mixture can become imbalanced, leading to an unstable or uneven idle. This irregularity may be evident as fluctuations in engine speed when the vehicle is at rest or when the throttle is not engaged.

The other options, while they may point to various problems in a vehicle, are not directly linked to fuel injector issues. Increased tire wear typically indicates alignment problems or issues with suspension components. Higher oil consumption often relates to issues with the engine's internal seals, piston rings, or valve guides, rather than fuel injectors. Electrical system failure pertains to the vehicle’s electrical components and circuits and does not directly correlate with fuel injection performance. Therefore, an uneven engine idle stands out as a direct sign of potential trouble with fuel injectors.