Car diagnostics & auto locksmith solutions

Your trusted experts in diagnostics & auto locksmith services

At SJC Automotive, we combine main dealer training with years of hands-on experience to deliver specialist diagnostic and auto locksmith services you can rely on. We work with all vehicle makes and models, using advanced diagnostic tools to identify and resolve electrical and mechanical faults.

Based in Hemel Hempstead, we’re proud to support both private and trade customers with a professional, mobile service designed around your needs.

DIAGNOSTICS

Dashboard lights or engine faults?

We use dealer-level tools to identify and fix issues quickly and accurately.

LOCKSMITH

Locked out or lost your keys?

We provide fast, mobile vehicle entry and key programming for all makes and models.

What clients have to say

S J C Automotive - Mobile Auto locksmith
5.0
Based on 100 reviews
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Jerry Green
07:01 16 Jul 25
Excellent service from Stuart at SJC. Responded immediately to my message and quoted a very reasonable price for a replacement key. Arrived when he said with a very well equipped van and had me back on the road in no time at all. An absolute pleasure to deal with, highly recommended.
Kerri
18:59 14 Jul 25
Quick, professional service - helpful and polite.
Highly recommended!
chris bloggs
13:29 19 Jun 25
Went above and beyond to sort a lock issue out , great service 👍👍
Caroline Green
05:54 14 May 25
Very pleased with air con regas. Would fully recommend.
David Isichei
11:14 07 May 25
Gave some great advice when called with an immobiliser problem. Was patient and polite over the phone which was really appreciated when in a tight spot. Would definitely use again when needed.
Melissa Anderson
08:32 29 Apr 25
Fantastic experience with S J C Automotive - Mobile Auto locksmith I needed help with my car and they were incredibly professional and knowledgeable. Guided me through the steps over the phone and made what could have been a stressful situation so much easier. I’m so grateful for their support and would highly recommend them to anyone needing a trustworthy auto locksmith!
Liz Devine
11:41 13 Apr 25
Friendly, arrived on time stated despite it being a Sunday, price as quoted . Fast, efficient and sorted out our key stuck in the lock of vw golf. Would recommend 100 %
Tom Cross Fitness
11:33 01 Apr 25
The best and more trustworthy mechanic going. Never have I felt such faith in a mechanic and that he is on your side! Don’t go anywhere else!!!
Aaron Bodger
09:22 28 Mar 25
Used SJC Automotive a number of times now , always polite and punctual. I wouldn’t use any one else 👍
Terry Barlow
18:05 12 Mar 25
This guy is brilliant phoned for my fob locked in boot of Audi , he arrived in 30 mins and retrieved my fob. Top man

Areas we cover

Based in Hemel Hempstead, SJC Automotive provides expert diagnostics and auto locksmith services across Hertfordshire and Bedfordshire. Whether you’re at home, at work, or stranded roadside, we offer a fast, mobile response to keep you moving.

Below are just some of the locations we regularly serve.

  • Kings Langley
  • Abbots Langley
  • Bovingdon
  • Redbourn
  • Chesham

  • Dunstable

Areas we cover

Based in Hemel Hempstead, SJC Automotive provides expert diagnostics and auto locksmith services across Hertfordshire and the surrounding areas. Whether you’re at home, at work, or stranded roadside, we offer a fast, mobile response to keep you moving.

Below are just some of the locations we regularly serve.

  • Kings Langley
  • Abbots Langley
  • Bovingdon
  • Redbourn
  • Chesham

  • Dunstable

Recent work

Take a look behind the scenes at some of our recent jobs.

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