Porsche Mileage Blocker Installation Service

Protect your Porsche’s odometer accuracy during dyno testing, track days, or off-road use with our professional mileage blocker installation service in Slough. Our specialists have extensive experience with Porsche 911, Cayman, Panamera, and other high-performance models, ensuring a safe and reliable installation tailored to your vehicle.

A mileage blocker allows your Porsche to record precise performance data without adding unnecessary miles to the odometer. These devices are designed for off-road and testing purposes, and while we provide professional installation, we cannot guarantee they are undetectable.

Our Slough workshop provides expert guidance and model-specific installation, ensuring your Porsche remains fully functional and safe while the mileage blocker is in use. We combine precision engineering with local knowledge, delivering a service that Porsche owners in Slough can trust.

Why Choose Onyx Performance?

As Seen on Carwow

We’ve been proudly featured on Carwow – a testament to the quality, professionalism, and performance-focused results that set us apart. Watch our feature here to see us in action.

Expertise You Can Trust

With years of experience and deep technical knowledge, our team understands performance vehicles inside and out – from custom remaps to high-end servicing.

Advanced Workshop & Tools

We operate from a state-of-the-art facility in Slough, equipped with cutting-edge diagnostics, dyno testing, and industry-leading tools for accurate, high-quality work.

Tailored Solutions for Every Vehicle

We don’t believe in one-size-fits-all. Every car gets a bespoke approach, ensuring the best results whether it’s a remap, upgrade, or routine service.

Trusted Nationwide

Performance enthusiasts from across the UK come to Onyx because they know they’ll receive premium-quality workmanship, careful attention to detail, and honest advice.

Complete Care, All in One Place

From tuning and servicing to tyres, trackers, and immobilisers – we offer a full suite of services under one roof, all with a strong focus on safety, reliability, and top-tier customer support.

Customer Reviews

    
 
 
       Posted on Google  
   
   Anil Soni 
 
 
 
 Trustindex verifies that the original source of the review is Google. Thank you guys for your professional, dedicated and honest opinion. You made my day by fixing my son's car so he could use it for DoE at very short notice. Max and Kay were brilliant and I would definitely recommend this garage as a organised and trustworthy business. Keep up the good work.
  
 
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   subin pradhan 
 
 
 
 Trustindex verifies that the original source of the review is Google. Took my BMW 440i to install downpipe and mid pipe. Top guys with good service and reasonable price. Will be going back for more work done.
  
 
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   J JareCki 
 
 
 
 Trustindex verifies that the original source of the review is Google. I just done Stage1 in my audi s3, car drive superb, excelent service, thanks Ben,Sam and Onyx team! Brilliant work
  
 
      Posted on Google  
   
   Dan May 
 
 
 
 Trustindex verifies that the original source of the review is Google. Honest and knowledgable! Rare these days - saves me hundreds by checking my Golf R properly. Will only use these guys from now on
  
 
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   Darren Dawes 
 
 
 
 Trustindex verifies that the original source of the review is Google. I took my jaguar xfr to these guys for a re map . Excellent service. They could not have been more helpful. Very knowledgeable they definitely know what they are doing. If your looking for a re map I would highly recommend you speak to them.
  
 
      Posted on Google  
   
   Hana 
 
 
 
 Trustindex verifies that the original source of the review is Google. I was recommended Onyx to get my diamond-cut alloys refurbished. I am located an hour away but the recommendation was important so decided to leave my car with these guys. First impressions, the team were very polite, friendly (Essan, Ben and the guys that actually did the refurb in the intense heat) The prices were competitive. And the quality of work was super. There was slight miscommunication post the sale (which happens) but I was pleased they resolved this to my satisfaction. One idea I would suggest is advising the customer 'before' the work starts that the TPF valves may need replacing so we have the option to decide whether to do it whilst the wheels are off anyway rather than post refurb to avoid scratching the newly done alloys. Otherwise happy with my overall experience.
  
 
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   Mark 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing service
  
 
      Posted on Google  
   
   pavan khangura 
 
 
 
 Trustindex verifies that the original source of the review is Google. The best experience ever well organised clean friendly team and the experience was amazing A big up to the whole staff.

Install a Porsche Mileage Blocker in Slough Today

Ensure accurate mileage management for dyno runs, track sessions, and off-road testing. Our technicians provide fast, reliable, and fully tested installations, compatible with all Porsche performance models. Keep your vehicle performing at its best while protecting odometer readings during testing or track use.

5-Star Google Reviews

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Why Choose Onyx Performance for Servicing?

Experts in Performance Cars

We know how to properly care for performance, modified, and luxury vehicles. Our team has the skills and experience to handle specialist requirements confidently.

Correct Service Schedules

Every service follows the exact schedule recommended by your vehicle’s manufacturer, helping maintain performance and protect your warranty.

Quality or OEM Parts

We only use high-quality aftermarket or original manufacturer parts, ensuring long-lasting reliability and top-level performance.

Full Vehicle Inspection

Our service goes beyond just changing oil. We inspect all key systems to keep your car safe, smooth, and road-ready.

Honest Advice, No Surprises

With transparent pricing and expert recommendations, you’ll always know what your car needs – no upselling, no hidden fees.

Fast, Trusted & Tracked

We offer quick turnaround, maintain service records, and send reminders – that’s why customers travel to us from across the UK.

Frequently Asked Questions

What is a mileage blocker?

A mileage blocker temporarily pauses the odometer during dyno runs, track days, or off-road activities, ensuring extra miles aren’t permanently recorded in your Porsche’s ECU.

Can a mileage blocker be used on all Porsche models?

Yes — we support 911, Cayman, Panamera, Macan, and Taycan models. Each installation is tailored to the specific Porsche model.

Does installing a mileage blocker affect my vehicle warranty?

When used correctly for off-road or testing purposes, mileage blockers generally do not interfere with your warranty, though use on public roads may carry risks.

Are mileage blockers detectable by dealerships or service centres?

We cannot guarantee they are undetectable. These devices are sold strictly for off-road and testing purposes.

How is a mileage blocker installed?

Installation is carried out by our Skilled technicians in Slough, ensuring plug-and-play operation without affecting your Porsche’s electronics.

Can the mileage blocker be switched on and off?

Yes — most modules allow manual activation and deactivation, giving you full control during dyno testing or track use.

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