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
141 Google Reviews
User Image
Gareth Jones
November 3, 2025
Simply excellent in knowledge service and price. Enormously grateful that helpful experts like Mister Injector exist to help keep classics like my old V12 Jaguar on the road.
User Image
Jonathan Stroud
November 1, 2025
It was nice to speak to someone who knew what they were talking about.The injectors came back perfect excellent service
User Image
John Kenealy
October 28, 2025
A1 thanks, injector back serviced. Looks brand new.
User Image
Ronald R
October 26, 2025
Very pleased with the injectors, outstanding work on them. Started my E46 330ci today and she's a happy girl. Would certainly recommend Mr Injector for your injector needs. Thank you James and company 👍
User Image
Jamie S
October 25, 2025
A great experience from start to finish. I used the chat function on the website to ask some questions and got replies within 5 minutes to all my messages. I proceeded with the service and dropped them at the premises and within the stated two days the injectors were ready to be sent back to me with a comprehensive report, spreadsheet style with metrics and data for each injector. Even though there were no issues with my injectors, its peace of mind for me and the knowledge that they’re now renewed and ready for many tens of thousands of miles more. I received them well wrapped and professionally packaged and am stunned with the results. They look fantastic- like new units have come back to me. Highly recommend using this service before spending many hundreds more on new injectors (which is what I was thinking of doing)! I’ll be back if I ever need more injector work :)
User Image
We live life on the edge Yt
October 24, 2025
I had a fantastic experience with Mr Injector UK. James repaired my injectors at a very reasonable price and went above and beyond with his customer service. Not only did they keep me updated throughout the process, but they also provided a thorough description of the work carried out along with detailed test results. What really stood out was the helpful advice I received over the phone — knowledgeable, honest, and clearly passionate about what they do. It’s rare to find a company that combines technical expertise with such great communication. Highly recommended! Keith
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The Realist
October 22, 2025
Superb service and communication,, Cars running beautifully now thanks to mr injector uk
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Lee Topham
October 1, 2025
Fantastic service. James managed the servicing of my motorbike injectors professionally from start to finish. Communication was very good, pricing very competitive, and glad that I used Mr Injector when initially undecided who to use. Received my parts back well packaged with both digital and paper copies of receipts and injector performance information before and after the work. I highly recommend this company. This was for a set of 1998 VFR800FI injectors that needed a service at 60k miles.
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Ian Pittam
September 30, 2025
Did a professional job of refurbishing the injectors for my Audi. Car was running on 3 cylinders due to a blocked injector. Now running smoothly once again. Great service
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Alexander Ross
September 19, 2025
Absolutely delighted with the results and quick turnaround on a set of Bosch Injectors. The injectors look as good as new and it is helpful to have a report of their performance and flow both pre and post refurb. Another nice touch was I sent my injectors labelled for each cylinder - they came back in a compartmentalised bag with each cylinder marked on them. The superb attention to detail here was greatly appreciated. I'll definitely be using James again next time! Alex R.
User Image
Gareth Jones
November 3, 2025
Simply excellent in knowledge service and price. Enormously grateful that helpful experts like Mister Injector exist to help keep classics like my old V12 Jaguar on the road.
User Image
Jonathan Stroud
November 1, 2025
It was nice to speak to someone who knew what they were talking about.The injectors came back perfect excellent service
User Image
John Kenealy
October 28, 2025
A1 thanks, injector back serviced. Looks brand new.
User Image
Ronald R
October 26, 2025
Very pleased with the injectors, outstanding work on them. Started my E46 330ci today and she's a happy girl. Would certainly recommend Mr Injector for your injector needs. Thank you James and company 👍
User Image
Jamie S
October 25, 2025
A great experience from start to finish. I used the chat function on the website to ask some questions and got replies within 5 minutes to all my messages. I proceeded with the service and dropped them at the premises and within the stated two days the injectors were ready to be sent back to me with a comprehensive report, spreadsheet style with metrics and data for each injector. Even though there were no issues with my injectors, its peace of mind for me and the knowledge that they’re now renewed and ready for many tens of thousands of miles more. I received them well wrapped and professionally packaged and am stunned with the results. They look fantastic- like new units have come back to me. Highly recommend using this service before spending many hundreds more on new injectors (which is what I was thinking of doing)! I’ll be back if I ever need more injector work :)
User Image
We live life on the edge Yt
October 24, 2025
I had a fantastic experience with Mr Injector UK. James repaired my injectors at a very reasonable price and went above and beyond with his customer service. Not only did they keep me updated throughout the process, but they also provided a thorough description of the work carried out along with detailed test results. What really stood out was the helpful advice I received over the phone — knowledgeable, honest, and clearly passionate about what they do. It’s rare to find a company that combines technical expertise with such great communication. Highly recommended! Keith
User Image
The Realist
October 22, 2025
Superb service and communication,, Cars running beautifully now thanks to mr injector uk
User Image
Lee Topham
October 1, 2025
Fantastic service. James managed the servicing of my motorbike injectors professionally from start to finish. Communication was very good, pricing very competitive, and glad that I used Mr Injector when initially undecided who to use. Received my parts back well packaged with both digital and paper copies of receipts and injector performance information before and after the work. I highly recommend this company. This was for a set of 1998 VFR800FI injectors that needed a service at 60k miles.
User Image
Ian Pittam
September 30, 2025
Did a professional job of refurbishing the injectors for my Audi. Car was running on 3 cylinders due to a blocked injector. Now running smoothly once again. Great service
User Image
Alexander Ross
September 19, 2025
Absolutely delighted with the results and quick turnaround on a set of Bosch Injectors. The injectors look as good as new and it is helpful to have a report of their performance and flow both pre and post refurb. Another nice touch was I sent my injectors labelled for each cylinder - they came back in a compartmentalised bag with each cylinder marked on them. The superb attention to detail here was greatly appreciated. I'll definitely be using James again next time! Alex R.
User Image
Gareth Jones
November 3, 2025
Simply excellent in knowledge service and price. Enormously grateful that helpful experts like Mister Injector exist to help keep classics like my old V12 Jaguar on the road.
User Image
Jonathan Stroud
November 1, 2025
It was nice to speak to someone who knew what they were talking about.The injectors came back perfect excellent service
User Image
John Kenealy
October 28, 2025
A1 thanks, injector back serviced. Looks brand new.
User Image
Ronald R
October 26, 2025
Very pleased with the injectors, outstanding work on them. Started my E46 330ci today and she's a happy girl. Would certainly recommend Mr Injector for your injector needs. Thank you James and company 👍
User Image
Jamie S
October 25, 2025
A great experience from start to finish. I used the chat function on the website to ask some questions and got replies within 5 minutes to all my messages. I proceeded with the service and dropped them at the premises and within the stated two days the injectors were ready to be sent back to me with a comprehensive report, spreadsheet style with metrics and data for each injector. Even though there were no issues with my injectors, its peace of mind for me and the knowledge that they’re now renewed and ready for many tens of thousands of miles more. I received them well wrapped and professionally packaged and am stunned with the results. They look fantastic- like new units have come back to me. Highly recommend using this service before spending many hundreds more on new injectors (which is what I was thinking of doing)! I’ll be back if I ever need more injector work :)
User Image
We live life on the edge Yt
October 24, 2025
I had a fantastic experience with Mr Injector UK. James repaired my injectors at a very reasonable price and went above and beyond with his customer service. Not only did they keep me updated throughout the process, but they also provided a thorough description of the work carried out along with detailed test results. What really stood out was the helpful advice I received over the phone — knowledgeable, honest, and clearly passionate about what they do. It’s rare to find a company that combines technical expertise with such great communication. Highly recommended! Keith
User Image
The Realist
October 22, 2025
Superb service and communication,, Cars running beautifully now thanks to mr injector uk
User Image
Lee Topham
October 1, 2025
Fantastic service. James managed the servicing of my motorbike injectors professionally from start to finish. Communication was very good, pricing very competitive, and glad that I used Mr Injector when initially undecided who to use. Received my parts back well packaged with both digital and paper copies of receipts and injector performance information before and after the work. I highly recommend this company. This was for a set of 1998 VFR800FI injectors that needed a service at 60k miles.
User Image
Ian Pittam
September 30, 2025
Did a professional job of refurbishing the injectors for my Audi. Car was running on 3 cylinders due to a blocked injector. Now running smoothly once again. Great service
User Image
Alexander Ross
September 19, 2025
Absolutely delighted with the results and quick turnaround on a set of Bosch Injectors. The injectors look as good as new and it is helpful to have a report of their performance and flow both pre and post refurb. Another nice touch was I sent my injectors labelled for each cylinder - they came back in a compartmentalised bag with each cylinder marked on them. The superb attention to detail here was greatly appreciated. I'll definitely be using James again next time! Alex R.