Please wait...
Please wait...
Our website uses cookies so that you can place orders and we can provide a better service. Continue to use the site as normal if you're happy with this, or find out how to manage cookies.
Please wait...
Cobra Alarms A4138, Bridge Category 1 Car Alarm / Immobiliser4138
£169.99 Save £358.04  was:£528.03
Click to Close

Fit it Yourself?

Everything you need to fit it yourself at home

Only £30.00 

With Steering Wheel Control
Only £50.00 

2 Stars (3)
Car Alarms Cobra Alarms 4138

Cobra Alarms A4138, Bridge Category 1 Car Alarm / Immobiliser

Save: £358.04 (68%)  rrp: £528.03
2 Stars
3 Review(s) / write a review
Quickfind Code - 23426
Save: £358.04 (68%)
rrp: £528.03

Finance Available
On Orders Over £300

  • COVID-19 We are open online & shipping orders during the COVID-19 pandemic
  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders before 5pm
  • Easy Returns Easy Returns
  • 1 Year Easy Warranty 1 Year Easy Warranty

Click image to zoom

Key Features

A, Bridge Category 1 Car Alarm / Immobiliser - Cobra Alarms 4138

Cobra 4138 Bridge Category 1 Car Alarm / Immobiliser

Cobra A4138 is a remotely controlled via the latest and highly secure digital code technology (Arithmetic Controller Engine), the new Cobra 4138 offer the highest protection level with its additional engine cut immobiliser module and multiple push button remote control. Designed to comply with the strictest insurance companies homologation specifications.

New security features such as automatic hazard light warning (in an emergency brake, hazard lights come on automatically) and speed limit alert.

Cobra 4138 Features

  • High security ACE remote controls with auto learning
  • Single engine immobilisation circuit (built-in)
  • Immobiliser passive arming
  • Alarmn passive arming
  • High power back up battery siren
  • Automatic re-arming in case of accidental disarming
  • Panic Alarm
  • Anti hi-jack (programmable in automatic and/or voluntary mode)
  • Insurance approved
  • Thatcham Category 1 status

Download image of Cobra Alarms 4138 Click here for Image of Cobra Alarms 4138
Please wait...
Customer reviews

One of the best.
Autolec Gloucestershire on 26/02/2018 5 star rating

The Cobra 4138 is in my opinion one of the best and most reliable Thatcham Cat 1 alarms on the market. They are bullet proof and just work. The instructions can be a little confusing but to proffesional alarm installers, a walk in the park. Car alarms especially with immobilisers should only be installed by professionals who are qualified and aware their complexity. Cobra, Autowatch, Meta and Toad alarms in my opinion are the only manufacturers to consider.

david bryn
tony coates on 25/12/2015 1 star rating

I find the remarks of David Bryn offensive, because he did not like the product, he has chosen to insult the intelligence of patients of mental hospitals. We should remember that the patients are there because they are ill, not stupid.....

cobra 4100
david bryn on 07/06/2012 1 star rating

well whoever wrote the user manual did it from the padded cell of a mental hospital, there are three buttons on the fob and in the instruction manual it only mentions A and B. HOWEVER THEY ARE NOT MARKED A AND B one is the sign of a open padlock. one the sign of a locked padlock and the third one is a key with a strange shape at the side of it, if anyone can understand the instructions he is a genius, my advice BUY ANYTHING ELSE BUT THE COBRA, THE DAM SYSTEM IS A NIGHTMARE. IT S ENOUGH TO SEND ANYONE INSANE

View all reviews

Write a review
Review Title: 

How many would you give this product?

Newsletter sign up

Questions/Answers About This Product
  • Question: 18 June 2019
    Car: Ford Fiesta - 2008>

    Will this fit a fiesta st180 2015? Do you fit as well?


    please contact the store you wish to visit for more information on what is required for your vehicle

    Found Useful? Yes 

  • Question: 12 July 2015
    Car: Ford Transit - 2005 >

    How much is to fit the alarm? In Tooting. Thanks

    please give them a call to get a quote for your fitting

    Found Useful? Yes 

Got a Question about this Product?

The email address is required to email you when your question has been answered

Car Make
Car Model

chars left

Newsletter sign up

N.B. Questions are answered during office hours
Please don't put sensitive info in the question.

Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

542 546 Mansfield Road, Sherwood NG5 2FR
Tel: 0115 9624 986
743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368
835 Garratt Lane, Tooting, London, SW17 0PG
Tel: 0208 971 9181