PETROL TEST FACILITY, NO DIESEL

Fuel Injector Overhaul Kits

We stock Master Injector UK's full 200+ catalogued overhaul and seal kits to suit standard port, direct high pressure (GDI), side feed and Bosch / Siemens Piezo injectors.

They have also designed overhaul kits for your historic hose to rail injectors, which include replacement ethanol-resistant hose lengths.

Replacing the hoses on your classic vehicle is essential now, considering the ethanol content in forecourt fuels today. Our hose is used in the aerospace and aviation industry, it is 100% ethanol proof. These kits will help to futureproof your classic vehicle.

Because of the delicate nature of injectors, particularly historic hose ones, we advise using somebody competent in removing/installing the parts on these injectors to prevent issues arising such as over-tightening of the hose clamps or damaging the pintle needles. Doing so yourself is at your own risk and we take no responsibility for damage resulting from poor handling or installation of parts.

These kits can be used to replace the seals and parts on your injectors when you know that they are working as they should be. These parts won't fix running issues.

If you're experiencing misfiring, leaking, poor acceleration or other issues, you would be best booking in a service with Mr Injector UK - 07950 281293.

    

If you can't see what you're looking for, please use the 'Vehicle / Injector Type' tab above or search for your vehicle manufacturer.

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Mr Injector UK - Petrol Injector Servicing & Diagnostics. NO DIESEL
131 Google Reviews
User Image
chiara melillo
September 5, 2025
I cannot fault the service! My injectors weren’t terrible to begin with, but coming off a 20+ year old car I know they needed some deep cleaning. They’re so much less tappy and more responsive now. They also arrived way quicker than expected and I’m over the moon with how my car runs now. The breakdown sheet provided after the service was also extremely helpful, and for the price I couldn’t recommend more :)
User Image
Ian McFadzean
August 23, 2025
Excellent service and results. BMWR1100S was running rough after a rebuild. After much head scratching, rebalancing of throttle bodies, replacing ignition coils, more rebalancing of throttle bodies etc. I sent the injectors for cleaning and testing in the hope that is where the problem lay. Sent back to me on time and with a full diagnostic test report. Refitted them today and wow! Bike is running sweet. My only regret is that I didn’t send them to James sooner.
User Image
Chris Ward
August 12, 2025
Very happy with James's service here. He persevered with my dodgy injectors and we got a full working set in the end. Happy to recommend!
User Image
Lee Hutton
August 12, 2025
Very helpful and knowledgeable in advising the best injectors for my application, thanks
User Image
Jason Russell
July 25, 2025
Great service, from initial call right through to delivery. Fast turn around from the booked in date to receiving them back. Really well packaged return delivery and they look great!
User Image
Lee Povey
July 17, 2025
Highly recommend, professional service.
User Image
Alan Bradshaw
July 2, 2025
Great service with a full report 👍
User Image
Stuart Wilson
June 30, 2025
Fantastic service and support to have my 2008 Audi TT Mk2 (2.0 TFSi) Bosch fuel injectors restored. Great value for money and excellent turnaround times. Car was misfiring, and not running well. Now is a dream to drive.
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Andrew Miles
June 29, 2025
Mr Injector UK serviced four DI injectors from my A4 2.0 TFSI engine, previously with a persistent mis-fire, especially when cold and sometimes after a long journey. They were returned by next-day delivery, clean, with seals and accessories, ready to refit. The car is now perfectly smooth and slightly more economical. Communication by email was great throughout. The technical report was reassuring. A great result at a fraction of the price of new injectors. Thank you!
User Image
Andrew
June 23, 2025
Just had five Bosch injectors serviced with James, from my initial email through to receiving the refurbished items communication was very thorough. Price was very reasonable and the injectors are as good as new, highly recommended!
User Image
chiara melillo
September 5, 2025
I cannot fault the service! My injectors weren’t terrible to begin with, but coming off a 20+ year old car I know they needed some deep cleaning. They’re so much less tappy and more responsive now. They also arrived way quicker than expected and I’m over the moon with how my car runs now. The breakdown sheet provided after the service was also extremely helpful, and for the price I couldn’t recommend more :)
User Image
Ian McFadzean
August 23, 2025
Excellent service and results. BMWR1100S was running rough after a rebuild. After much head scratching, rebalancing of throttle bodies, replacing ignition coils, more rebalancing of throttle bodies etc. I sent the injectors for cleaning and testing in the hope that is where the problem lay. Sent back to me on time and with a full diagnostic test report. Refitted them today and wow! Bike is running sweet. My only regret is that I didn’t send them to James sooner.
User Image
Chris Ward
August 12, 2025
Very happy with James's service here. He persevered with my dodgy injectors and we got a full working set in the end. Happy to recommend!
User Image
Lee Hutton
August 12, 2025
Very helpful and knowledgeable in advising the best injectors for my application, thanks
User Image
Jason Russell
July 25, 2025
Great service, from initial call right through to delivery. Fast turn around from the booked in date to receiving them back. Really well packaged return delivery and they look great!
User Image
Lee Povey
July 17, 2025
Highly recommend, professional service.
User Image
Alan Bradshaw
July 2, 2025
Great service with a full report 👍
User Image
Stuart Wilson
June 30, 2025
Fantastic service and support to have my 2008 Audi TT Mk2 (2.0 TFSi) Bosch fuel injectors restored. Great value for money and excellent turnaround times. Car was misfiring, and not running well. Now is a dream to drive.
User Image
Andrew Miles
June 29, 2025
Mr Injector UK serviced four DI injectors from my A4 2.0 TFSI engine, previously with a persistent mis-fire, especially when cold and sometimes after a long journey. They were returned by next-day delivery, clean, with seals and accessories, ready to refit. The car is now perfectly smooth and slightly more economical. Communication by email was great throughout. The technical report was reassuring. A great result at a fraction of the price of new injectors. Thank you!
User Image
Andrew
June 23, 2025
Just had five Bosch injectors serviced with James, from my initial email through to receiving the refurbished items communication was very thorough. Price was very reasonable and the injectors are as good as new, highly recommended!
User Image
chiara melillo
September 5, 2025
I cannot fault the service! My injectors weren’t terrible to begin with, but coming off a 20+ year old car I know they needed some deep cleaning. They’re so much less tappy and more responsive now. They also arrived way quicker than expected and I’m over the moon with how my car runs now. The breakdown sheet provided after the service was also extremely helpful, and for the price I couldn’t recommend more :)
User Image
Ian McFadzean
August 23, 2025
Excellent service and results. BMWR1100S was running rough after a rebuild. After much head scratching, rebalancing of throttle bodies, replacing ignition coils, more rebalancing of throttle bodies etc. I sent the injectors for cleaning and testing in the hope that is where the problem lay. Sent back to me on time and with a full diagnostic test report. Refitted them today and wow! Bike is running sweet. My only regret is that I didn’t send them to James sooner.
User Image
Chris Ward
August 12, 2025
Very happy with James's service here. He persevered with my dodgy injectors and we got a full working set in the end. Happy to recommend!
User Image
Lee Hutton
August 12, 2025
Very helpful and knowledgeable in advising the best injectors for my application, thanks
User Image
Jason Russell
July 25, 2025
Great service, from initial call right through to delivery. Fast turn around from the booked in date to receiving them back. Really well packaged return delivery and they look great!
User Image
Lee Povey
July 17, 2025
Highly recommend, professional service.
User Image
Alan Bradshaw
July 2, 2025
Great service with a full report 👍
User Image
Stuart Wilson
June 30, 2025
Fantastic service and support to have my 2008 Audi TT Mk2 (2.0 TFSi) Bosch fuel injectors restored. Great value for money and excellent turnaround times. Car was misfiring, and not running well. Now is a dream to drive.
User Image
Andrew Miles
June 29, 2025
Mr Injector UK serviced four DI injectors from my A4 2.0 TFSI engine, previously with a persistent mis-fire, especially when cold and sometimes after a long journey. They were returned by next-day delivery, clean, with seals and accessories, ready to refit. The car is now perfectly smooth and slightly more economical. Communication by email was great throughout. The technical report was reassuring. A great result at a fraction of the price of new injectors. Thank you!
User Image
Andrew
June 23, 2025
Just had five Bosch injectors serviced with James, from my initial email through to receiving the refurbished items communication was very thorough. Price was very reasonable and the injectors are as good as new, highly recommended!