A diesel injector is a precision-engineered component that delivers fuel into the combustion chamber of a diesel engine. It controls both the timing and the quantity of fuel injected, and plays a huge role in performance, fuel efficiency, and emissions.

Common signs that your diesel injectors may need replacing include:

• Rough idling or misfiring
• Difficulty starting the engine
• Loss of power or poor acceleration
• Excessive smoke from the exhaust
• Increased fuel consumption
• Engine warning light on the dashboard

If you notice any of these symptoms, it’s worth having your injectors tested by a qualified diesel technician.

While it may still be possible to drive, running a diesel engine with faulty injectors is not recommended. Bad injectors can lead to poor performance, increased emissions, and long-term damage to your diesel engine, which may include piston or cylinder wear. In some cases, it may even cause the engine to fail. We highly encourage to have it replaced as soon as possible to prevent costly repairs down the road.

At Baileys Diesel Group, diesel injectors range in price from $77 AUD to $990 AUD, depending on the make, model, and type of injector required. We stock genuine new, remanufactured, and blueprinted injectors, each tested to meet or exceed OEM specifications. We also have bundles available. All injectors are backed by a warranty and built to deliver reliable, long-term performance. Whether you're replacing a single injector or a full set, our team can help you select the right option for your engine and budget.

Diesel fuel injectors generally can't be repaired in the traditional sense, but they can be remanufactured if they're in structurally good condition. At Baileys Diesel Group, remanufacturing involves complete disassembly, ultrasonic cleaning, replacement of worn parts, and precise recalibration using OEM-compliant equipment. The result is a high-performance injector that meets or exceeds factory standards. If an injector is too damaged or out of tolerance, replacement is often the safest and most reliable option. We offer a full range of remanufactured and blueprinted injectors to suit most applications.

Some of the most common symptoms of a bad diesel injector include:

• Engine misfiring or hesitation
• Poor fuel economy
• Hard starts or failure to start
• Strong fuel odour
• Black, white, or blue smoke from the exhaust
• Knocking or unusual engine noises

If left unchecked, bad injectors can significantly contribute to engine wear or failure. This is why early diagnosis is extremely important.

The lifespan of a diesel injector depends on the fuel quality, maintenance practices, and driving conditions. Generally, injectors last between 100,000 to 150,000 kilometres, although some may last longer with regular servicing and high-quality fuel. Remanufactured or blueprinted injectors from Baileys Diesel Group are built for durability and are tested for long-term reliability.

Of course. Replacing worn or faulty injectors is often well worth the investment. New or remanufactured injectors can restore lost performance, improve fuel efficiency, reduce emissions, and prevent serious engine damage. Many of our customers report noticeable improvements in power and fuel economy immediately after fitting replacement injectors.