Diesel Injector Repair & Testing

Bosch EPS 205 testing leads the process. NKD repairs supported, serviceable injectors and checks replacements when repair is not viable.

Diagnosis & Bench Testing

Automatic Bosch EPS 205 testing at pressures up to 1,800 bar, followed by a clear report before work is quoted.

  • Spray, delivery and leak-back measurements
  • Test before repair or replacement
  • Before-work test report

Injector Repair & Reconditioning

Cleaning, inspection, serviceable component replacement, calibration and retesting for supported diesel injectors.

  • Ultrasonic cleaning and inspection
  • Repair where the injector is serviceable
  • Calibration and after-work testing

Reports & Warranty

Measured before-and-after results document the work, with a 6-month warranty on reconditioned injectors.

  • Before-and-after test reports
  • 6-month warranty on reconditioned injectors
  • New washers with reconditioned injectors

Replacement Injector Sourcing

If an injector cannot be repaired, NKD can check new, reconditioned or service-exchange options where available.

  • Price and availability confirmed on request
  • Part-number or photo fitment check
  • Free nationwide delivery

Test first. Repair where possible.

Hard starting, smoke and power loss do not automatically mean you need replacement injectors. NKD tests supported units before quoting so the recommendation is based on measured results.

  • Hard starting
  • Rough idle or misfire
  • Loss of power
  • Black smoke
  • Unusual diesel knock
  • High fuel consumption
1

Share the vehicle and symptoms

Send the make, model, year, engine, symptoms, quantity, location and an injector part number or photo.

2

Test before quoting

NKD bench-tests supported injectors and uses the measured results to recommend the next step.

3

Approve repair or replacement

Serviceable injectors can be reconditioned. If repair is not viable, NKD can check a sourced replacement option.

4

Retest and document

Reconditioned injectors are calibrated, retested and supplied with before-and-after test reports.

5

Warranty and return

Reconditioned injectors carry a 6-month warranty and can be returned through the nationwide courier service.

Injector types NKD can assess

Machine literature is not a fitment guarantee. Confirm the injector part number with NKD before sending it to the Pretoria workshop.

Bosch solenoid common railCRI and CRINSupportedAccepted for EPS 205 testing and repair assessment.
Other solenoid common railDelphi, Denso and other solenoid categoriesConfirm part numberSend the injector number or a clear photo so NKD can confirm the exact type before it is couriered.
Conventional injectorsDHK/UI nozzle-holder assembliesSupportedAccepted for testing and repair assessment.
Non-Bosch piezo categoriesDenso, Siemens and ContinentalConfirm part numberCapability depends on the exact injector. Confirmation is required before sending it to NKD.
Bosch piezo injectorsBosch piezoNot supportedNKD does not test or repair Bosch piezo injectors.

Help for drivers, workshops and fleets

For vehicle owners

Get a measured diagnosis before spending on replacement injectors. NKD explains the test result and quotes the viable repair or sourcing route.

If replacement is needed, browse advertised applications.

For workshops and fleets

Use before-and-after reports to document injector condition for your team or customer. Include the workshop or fleet name and quantity in the trade enquiry.

Diesel injector repair questions

How much does diesel injector repair cost?

There is no single price for every injector. The exact injector, quantity and measured condition determine what work can be quoted. Send the part number or a clear photo with your vehicle details and symptoms. NKD confirms compatibility, tests supported units and provides a quote before repair. Testing charges and turnaround must be confirmed when booking.

Does hard starting mean I need new injectors?

Not on its own. Hard starting, smoke, rough idling and loss of power can have other causes. These symptoms are a reason to investigate, not proof that an injector needs replacing. Bench testing measures the condition of supported injectors before NKD recommends repair or checks a replacement option.

What does an injector test report show?

NKD measures spray, delivery and leak-back performance on supported injectors. The before-work report records the tested condition; after repair, retesting documents the results. An injector bench test assesses the injector itself, rather than diagnosing every possible fault on the vehicle.

Can my injector be repaired?

Testing decides that. NKD measures each supported injector first, then quotes repair only when the unit is serviceable.

Which injectors can the EPS 205 test?

NKD accepts Bosch solenoid CRI and CRIN, supported third-party solenoid common-rail categories, and conventional DHK/UI nozzle-holder assemblies. Send a part number first for any category that needs confirmation.

Can NKD test Bosch piezo injectors?

No. NKD does not test or repair Bosch piezo injectors.

What if my injector is beyond repair?

NKD can check a new, reconditioned or service-exchange replacement where that option is available. Stock and price are confirmed when you enquire.

How do I identify the correct replacement injector?

Send the make, model, year and engine plus the injector part number or a clear photo. A vehicle name on its own is not enough to prove fitment.

Book an injector assessment

Send the vehicle, injector part number or photo, symptoms, quantity and your location. NKD will confirm compatibility before you courier anything.

Prefer to talk? Call +27 65 861 0876

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