Why Diesel Turbos Fail and How to Avoid a Repeat Failure

The short answer: most diesel turbo failures trace back to oil problems, air-intake restrictions or foreign objects, so the cause must be fixed when the turbo is replaced.

What does a turbocharger do?

A turbocharger uses exhaust gas to spin a turbine that forces extra air into the engine, which increases power and efficiency.

What are the signs of a failing diesel turbo?

Loss of power, slow boost, blue or black smoke, a whistling or siren-like noise, and higher oil consumption.

Why do diesel turbos fail?

• Oil starvation or contaminated oil: the turbo's bearings depend on clean oil supply.
• Restricted air intake: a blocked air filter or damaged intake pipe makes the turbo work harder.
• Foreign objects: debris entering the intake or exhaust side can damage the blades.

What should I check when replacing a turbo?

Check the oil supply and return lines, change the oil and filter, and inspect the air intake and filter, so the new turbo is not exposed to the same problem.

How do I choose the right turbo?

Match the turbo to your engine code. If you're unsure, send your vehicle make, model, year and engine code to Diesel Fuel Parts and ask us to help confirm the correct part.

Who should install the turbo?

Diesel Fuel Parts supplies parts only and does not offer fitment. We recommend having the turbo installed by a qualified diesel professional, so the new part is not compromised in any way.

Not sure which turbo you need? WhatsApp us on +27 72 364 6774 with your vehicle details and we'll help you confirm the correct part.

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