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Merthyr Tydfil Diagnostic Checks: Prices, Reviews & Local Insights
£101.33
Average price for a Diagnostic Checks in Merthyr Tydfil
4.68★
average rating based on customer feedback.
172
customer reviews for garages in Merthyr Tydfil
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Evans Halshaw Merthyr Tydfil Ford
Physical Garage
Pentrebach Road, Merthyr Tydfil, CF48 1YA
About Us
Affordable servicing from Evans Halshaw Accompanying our extensive range of offers on new and used vehicles are a wide selection of services that offer a cost-effective way of keeping your vehicle in its best possible condition. Ranging from routine servicing through to essential repairs, our dedicated retailers can accommodate any work your vehicle needs doing. What's more, our technicians are fully qualified and have access to the best diagnostic equipment and workshop tools. In addition to any service you have completed, our technicians will carry out a complimentary Vehicle Health Check. The technician performing the check will then pro
Diagnostic Check£130
4.44 (66 reviews)
Reviews Summary
AI Generated
Reviews are largely favourable, with many customers praising friendly, helpful staff, efficient workmanship, good value compared with main dealers and handy extras like under‑car videos and complimentary valets. Frequent complaints centre on poor communication and scheduling — missed or unhonoured bookings, long waits, difficulty getting phone responses and unexpected charges — plus occasional missed checks or minor faults (tyre/washer issues, one report of an oil leak). Overall this appears to be a competent, good‑value dealer that wins strong repeat custom when transparency and appointment handling are reliable.
Blakeys MOT Centre
Physical Garage
OLD RHYMNEY RD, DOWLAIS TOP, MERTHYR TYDFIL, CF48 2YG
About Us
Blakey's MOT Centre Ltd is a trusted name in vehicle care based in Dowlais. We offer MOT testing, servicing, and recovery for cars and light commercial vehicles. Our team, with over 4 decades of experience, ensures your vehicle remains safe and roadworthy. Whether you need a routine MOT, reliable servicing, or assistance with vehicle recovery, we provide dependable solutions tailored to meet your needs. We proudly offer high-quality products from trusted brands like Bosch, Delphi, and Yuasa. we specialise in providing reliable and thorough MOT testing services for all vehicles. Our team of skilled technicians ensures your car or commercial v
Diagnostic Check£60
5 (22 reviews)
Car Care - CF47 8EB
Physical Garage
Yew Street, Dowlais, Merthyr Tydfil, CF47 8EB
About Us
We are a friendly garage & pride ourselves on our excellent customer service.
Diagnostic Check£60
4.71 (47 reviews)
Reviews Summary
AI Generated
Most reviewers praise Phil and his team for friendly, helpful service, quick turnarounds and good value, with many customers returning repeatedly. Common strengths mentioned are clear updates, same‑day repairs, convenient pick‑up/drop‑off and polite, knowledgeable staff. A minority raise issues about mismatched online quotes or unexpected extra costs, occasional closures/poor communication, hard‑to‑read handwritten invoices and a few rare workmanship complaints (notably one brake issue).
Baylis Southern Merthyr Tydfil
Physical Garage
Pentrebach Rd, Merthyr Tydfil, CF48 1YA
About Us
Baylis, Vauxhall car servicing, MOTs and repairs in Merthyr Tydfil. Manufacturer knowledge you can trust. From vehicle diagnostics and health checks to air con servicing and general repairs, you have peace of mind that you have the best technicians and genuine parts. Baylis prides itself on its reputation as a franchise dealership which always carries out work to the highest standard. Book your Vauxhall service, repair and/or MOT today and get the best in customer service and quality of work. Book a service and MOT at the same time for even more savings. There is no payment to be made on BookMyGarage, you will simply pay after the work is do
Diagnostic Check£120
4.55 (37 reviews)
Reviews Summary
AI Generated
Customers are largely positive, praising friendly, helpful staff, clear communication (often via inspection videos), timely, thorough servicing and good value — many say they’d return or recommend the garage. Frequent highlights are professional technicians, clean waiting areas and useful loan cars, with several long‑term customers noting competitive pricing versus main dealers. Recurring criticisms concern inconsistent front‑desk manners, missed promised extras (car wash/vac), occasional scheduling or billing problems and a few reports of work not being completed.
What does a car diagnostic check do?
A diagnostic check is carried out on your vehicle by a mechanic, who will plug your vehicle into a specialised code reader. It can detect problems with your vehicle which may be difficult to spot manually.
The main components which are tested in a diagnostic check are the car’s:
- electronic control units (ECUs) - these control various element of the car and its performance including engine running
- emissions and exhaust sensors
- braking system
- electrical components such as central door locking
- transmission if electronically controlled
- ignition coils
- throttle setting
- fuel injectors
- air flow and coolant
Why is a car diagnostic check important?
A diagnostic check is very important as it can detect a potential problem with your car, even before a breakdown. The computerised equipment scans your vehicle’s system to check for any faults, no matter how minor or major. A diagnostic test is a quick, easy and accurate way to discover any faults and will give you the chance to get them fixed before they turn into bigger and more expensive issues. When your car has a fault, this may show as a warning light on the dashboard. If the light goes out the system will store the fault code so the garage will find this when they do the diagnostic check.
What are the possible signs that your car needs a diagnostic check?
There are many different signs which will indicate that your vehicle needs a diagnostic check. Essentially, if you suspect that there is an issue with your car but don’t know what, you will probably want to book a diagnostic check to find out what the problem is. Here are some of the key signs:
- Engine warning light - if the engine warning light appears on your dashboard, it’s important to take your vehicle to a garage as soon as possible as there is a wide variety of problems which the light may be flagging up.
- Strange noises – any strange noises coming from your car need to be checked out before they turn into more serious problem. Some of these sounds may include; whining from the bonnet, abnormally loud exhaust, uneven engine noise, brake squealing or gear crunching.
- Smoke - if you see smoke or steam coming from under the bonnet, your vehicle may be overheating.
- Vibrating - if you notice any vibrating or pulling under your brake, the issue may be due to work brake discs or pads. However, it could also indicate a problem with your suspension or steering.
How long do car diagnostics take?
You can expect a diagnostic check on your car to take approximately 90 minutes. You may want to allow for more time though as the mechanic who will be carrying out the check might not be available to start right away.
How much does a car diagnostic check cost?
The price of a car diagnostic test can vary, depending on the garage that you visit. Each garage has a fixed price for diagnostic checks, ranging from £30 - £100.
Enter your vehicle registration number and post code into BookMyGarage (at the top of this page) and you can instantly compare diagnostic check pricing from all of the garages in your local area. As well as price, you can see the garages’ reviews, distance from your post code, extra services offered and availability. You don’t even have to register to get access to all of this information. When you have selected a suitable garage, you can choose a date, any optional extras (such as collection and delivery, loan car etc.) and book online.
What do you need from your garage?
You may live within walking distance of a garage which offers most of the services you need. However, by sticking with the nearest garage in Merthyr Tydfil you could be missing out on a better deal. What if a garage with a collection / drop off service or courtesy car could do the same job at a good price, without the inconvenience of losing your car for the duration of the repair? BookMyGarage allows you to search for local garages which offer this facility, and compare their prices, all in one session.