Add german Engineering to great british cars – Available globally!

The Electronics Doc
for all your classic British Cars

T4 TestBook HandHeld DCT4001A
Just arrived:
Land Rover T4
Dealer Level Diag
Handheld

T4 TestBook HandHeld DCT4001A – All Features!
Supports Defender, Disco, Disco2, Freelander, Range & New Range Rover
ONLY ONE LEFT!

999€ incl. Shipping

You already know what you are looking for? Just visit our Shop!
Why BritsDoc

“ BritsDoc has repaired,
rescued and improved more
than thousand vehicles in a decade ”

We offer a wide Range of Services and Products for improved reliability of your car, or for making it even better than before.

Taking care of problems with your Engine Control Unit (ECU), your Immobilizer, Body Control Unit (BCU), Remote Keyfobs and many more, offering maximum safety and robustness when desired or required.

Providing services & products since more than a decade, with a 0% failiure rate.

We can also service, repair and upgrade your defect HP and Omitec TestBook Diagnostic Computer or provide you with new Adaptors & Cables.

What can we do for your Brit?

We take care of almost everything electrical around your beloved Brit.
Electronic Fuel Injection, Immobilizer, Central Locking, Remotes & Diagnostic Equipment.

Defender
Land Rover Range Rover
MG, Mini & Rover
Lotus
Morgan

Immobilizer Bypass

Most customers ask for our Immobilizer Bypass Module with unbeaten track record, because they don’t trust the unreliable installed system, where no spare parts are available anymore and replacement of the system would be thousands of $$$.

ECU repair & tuning

In case the Engine Control Unit (ECU) becomes faulty because of aging parts or other defects, we can repair and restore the original functionality in most cases. We can even clone or backup your data or offer a replacement ECU.

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Diagnostic Equipment

There’s a wide range of Diagnostic Equipment available. From low-cost interfaces for hobbyists, medium Tools like Nanocom or Microcheck and the famous original Garage Tool called TestBook. We can help with Hardware, Software & Service for each of those!

British Cars Competence Center

Quality service, original diagnostic equipment and reliable fault diagnosis.

Since many years we are the well known competence center for maintaining and repairing the legacy diagnostic equipment called TestBook, which was used by the dealer garages. We offer everything from Laptop Computers with Diagnostic Software, Repair & Upgrade-Service of your TestBook and spare parts like Cables, CDs and diagnostic Adaptors

Interested in any service or Product?
Just use our
Contact Form!

Getting in touch is simple & easy. Just fill in our interactive Contact Form and we will get back to you as soon as possible.

diagnostic Hardware
Original Omitec T4 TestBook & Software

By using the original garage hardware, we can diagnose even the oldest models back to the years 1993. Only very few dealers can diagnose e.g. the air suspension of your legacy Land Rover Discovery or Defender

What customers
are saying

Here are a few comments from customers around the globe.
We’re proud of having a 5-Star google ranking.

I have received the goods safely. It was a wonderful deal. Thank you very much.
TSUNETO TANAKA
Honda Northern Mie Sales Ltd
Yokkaichi, Japan
It doesn’t get any better than Mr. Grafe’s work!
Immobilizer sent there, arrived, repaired and sent back on the same day. I have never experienced service like this before. PERFECT!
Everything is working perfectly again now!
I can and will recommend Mr. Grafe without a doubt!
Eric Jacob
Germany

Get an idea of what you can expect

When your Immobilizer is modified, a tailor made module becomes installed which will never let you down. It takes over all the functionality which is neccessary for your car to drive without any hassle.

  • If you had a Central Locking before, you will also have it afterwards
  • The modification does not interfere with your technical inspection or insurance!
  • Your remote keyfobs will continue to work as before. They are tested & refurbed while they are here
  • Typically your Alarm is disabled as well, preventing false alarms
  • All modifications can be removed to its original state without problems.
  • Just give us a call in case of questiones
safe yourself from breakdowns
Get all your immobilizer problems solved!

Don’t worry, we didn’t
forget the details

Typically all orders are processed the same day your items arrive at our place. For shipping we use DHL tracked parcels and so far not a single one has been lost.
If desired, we offer Express Shipping at the lowest fare available.

When sending your items from outside EU, please declare a value of 45€ (EURO!) and clearly mark the parcel on the outside with “Defective Items – For repair & return only”, otherwise Customs Fees and Import Taxes will occur!

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car diagnostics
We take care of your valuable diagnostic equipment
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We fix your broken TestBook

It doesn’t matter if you own a Rover T1, T2 or T3 TestBook or an Omitec T4 interface. We can fix almost all defects and perfom a fresh install of the original Software.

We also produce the most important diagnostic Adpaters and Cables, in case yours ar worn out or defect. We even offer military quality ToughBook Computer for garage use.

For all diagnostic tasks we have the necessary Software for your TestBook, giving you the same bunch of options your Garage has.

Our Partners

In case you need help & support, we highly recommend our parners below.
Those are well trained and experienced experts, equipped with everything necessary for the job.