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BMW Index 12 GDI Fuel Injector Cleaning and Testing

Regular price $32.95

Type: Fuel Injector Flow Testing and Cleaning

Vendor: The Injector Shop

Product Description

BMW VDO Index 12
GDI Fuel Injectors Flow Testing and Cleaning  Service

OEM Test Pressures and Plans

Piezo Crystal Stack Regeneration Available

The Injector Shop is proud to provide Piezo GDI fuel injectors testing and cleaning services for the BMW N54, N63, S63, and N74 engines with index 12 VDO Piezo GDI fuel injectors. Testing in performed using GDI specific precision test equipment, unlike most of our competitors that are testing GDI injectors on equipment designed for low pressure port fuel injection systems (ASNU type).

Piezo GDI Injectors are safely tested in specialized GDI test equipment at operating pressures typically up to 3000 PSI against OEM BMW test plans utilizing precision measuring devices that measure liquid flow on a shot to shot basis, at actual operating pressure. Testing this way allows for precision measurement under operating conditions that can be digitally analyzed against the OEM flow test plans set by the injector manufacturer. NO GUESSWORK. PERIOD!

Not only do GDI systems run at considerably higher fuel pressures than port injection, GDI fuel injectors operate pulse widths at micro second measurements, where port systems operate at milli second time measurements, and our GDI specific equipment tests at these micro second operational parameters while performing full function load testing.

An optional add on service, and a critical component to the proper service of BMW index 12 fuel injectors is Piezo re-stack or regeneration. Regeneration of the Piezo crystal stack is performed to restore the Piezo stack to OEM sizes and performance. Piezo stacks commonly expand, or become larger, due to continuous low speed driving. This expansion of the Piezo stack leads to slower injector response times and reduced overall flow. Slow response times and lower flow rates result in poor idle qualities and drops in performance under high engine demands. Our equipment has the capability to deliver varying pressure, heat and voltages to replicate the conditions the injector was designed to operate under. This process restores the Piezo crystal stack to it's OEM size and function. Piezo stack regeneration can be found and purchased here.

BMW N54 VDO GDI Fuel Injectors Testing on the GD1R at The Injector Shop

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Port fuel injector test benches that the majority of our competition use for GDI testing simply cannot perform any precision OEM testing or Piezo stack regeneration. This precision testing at actual GDI injector operating conditions allows us the ability to report the injector performance against the OEM injector specific test plan with 100% accuracy. This level of accuracy CANNOT be performed at any shop that is testing your GDI injectors on a port fuel injection bench at lower than operating pressure. If you are paying to have your GDI fuel injectors tested on an ASNU or similar port fuel injector flow bench you are getting the operators best guess as to how your injectors are performing....PERIOD!

There is absolutely NO GUESSWORK here at The Injector Shop. Test results are computer generated in very easy to understand color coded results. Individual test results can be provided digitally, as well as printed summary report.


$44.95 per injector
Select quantity to match the number of injectors you are sending

Special Note:
This service is intended for index 12 BMW injectors. Index 11 can be done, but no injectors index 10 or below will carry any performance warranty. If you have anything other than index 11 or 12 you are better off replacing your injectors with updated index 12's.

The Injector Shop Piezo GDI cleaning and testing service consists of:

  1. Cleaning
    1. Removal of serviceable o-rings, seals, micro filters, and spacer components
    2. Multi-stage heated ultrasonic cleaning
    3. Pressurized back flush to remove anything left internally after ultrasonic cleaning

      2. OEM Injector specific test plans
      1. R2LC electrical test for µF
      2. NLT nozzle leakage test at high pressure (205 BAR/2973 PSI)
      3. iVM (FL, PL, EM, LL, PI) injector volume measuring test
      4. Realtime oscilloscope testing

      3. Parts replacement
      1. Compression seals
      2. Inlet micro filter
      3. De-couplers are not provided


      The Injector Shop
      19407 99th Ave SE
      Snohomish WA 98296


      Shipping checklist:
      • Remove any external grease, oils, and gasoline from injectors than place in seal able plastic bags. We are not responsible for any incoming freight that is leaking or has external fuel odor and rejected/returned by shipper.
      • Cylinder numbers can be applied for your records, we do not need them but will sequence our reports to your numbering.
      • Print and fill out the below customer information and include it with the injector shipment.

      You will have a choice of return shipping options from us. You also have the option of purchasing additional shipping insurance here. The Injector Shop is not responsible for lost shipments or damage from any shipping provider.

      Customer Information:


      Street Address:

      City, State, Zip:

      Phone Number:


      Vehicle Year:

      Vehicle Make:

      Vehicle Model:

      Vehicle Engine Size:

      Vehicle VIN#:

      Number of injector’s sent:


      Current turnaround time:
      GDI Injectors will typically be ready for return shipment in 2 business days after they are received. Please feel free to contact us and ask our current turnaround time.



      The Injector Shop unconditionally guarantees the flow performance of your GDI injectors for 1 year.

      The Injector Shop does not place any guarantee on the defect of your injector such as but not limited to electrical issues, internal injector metering component failure, external body leaks, and physical body damage.

      Problems with injectors that cannot be fixed by this service:

        • Electrically bad (bad injector coils)
        • External leaks
        • Damaged pintle
        • Fire damage
        • Rust damage
        • Worn metering parts

          Important note:
          Any injectors that are sent in that cannot be serviced for whatever reason will be refunded individually or as a set. If full refund is given because the entire set of injectors is bad than return shipping will be billed to customer or injectors will be disposed of by The Injector Shop.