Find a Mobile Mechanic or Garage in Hertfordshire for Catalytic Converter Replacement & Repairs
Top garages & mobile mechanics for Catalytic Converter Replacement & Repairs in Hertfordshire
566 Reviews
Garage in Hertfordshire, 15 years of experience
I have been interested in the car repair industry for almost my entire life. The first few years were spent learning the trade and I went to college to study it properly. I worked at a garage as a BMW specia...
PAUL, WELWYN GARDEN CITY • 16th September 2025
156 Reviews
Garage in Hertfordshire, 9 years of experience
Qualified mobile mechanic with 9 years of experience working on various makes and models of cars. Specialising in VW/Audi and BMW brands
108 Reviews
Garage in Hertfordshire, 14 years of experience
Hi my name is Shan I have 17 years experience in vehicle diagnostic and repairs on all types of vehicles. I am very skilled in repairing most makes and models including cars ,vans minibuses and 4x4’s. I ...
35 Reviews
Garage in Hertfordshire, 17 years of experience
Currently have 17 years experience, starting out my apprenticeship at Bridge Automotive Academy for 3 years. I then moved into a local independent garage where I learnt the trade and gained experience. After...
HAMMAD, London • 19th December 2019
40 Reviews
Garage in Hertfordshire, 27 years of experience
I have been in the trade for 27 years. I began at a car sales dealership servicing the fleet of cars there and after this I moved to Vauxhall for 5 years and reached the gold level technician level After Vau...
125 Reviews
Mobile mechanic serving Hertfordshire, 18 years of experience
I’ve worked in the motor industry for over 18 years now my main experience is with all makes and models but my specialty is in jaguar and German makes of car as I spent most of my career in jaguar, BMW and M...
405 Reviews
Garage serving Hertfordshire, 7 years of experience
Clutch,diagnostic,brakes,servicing,timing belt and chain,all mechanical jobs,mot’s
MARIE, AMERSHAM • 20th August 2025
106 Reviews
Garage serving Hertfordshire, 15 years of experience
At Heathrow Recovery & Car Repair Centre we provide friendly, professional services for all of your recovery and automotive needs. We'll Get You Back on the Road Quickly! Whether your vehicle needs routi...
141 Reviews
Mobile mechanic serving Hertfordshire, 10 years of experience
I have in this field from last 10 years I worked in Europe and from last 5 years I have been working in UK 🇬🇧 and I know the Japanese car and German cars <a href='https://www.clickmechanic.com/' title='Clic...
306 Reviews
Mobile mechanic serving Hertfordshire, 15 years of experience
Have 15 years of experience as an mot inspector and can check if car is road legal and safe to drive
32 Reviews
Garage serving Hertfordshire, 10 years of experience
With Main Dealer trained mechanics and over 60+ years of experience between us, we here at GP Auto’s offer our customer excellent rates on all vehicle servicing and repairs. Combined with our friendly atmosp...
66 Reviews
Garage serving Hertfordshire, 25 years of experience
I began my career with a Jaguar specialist where I completed my apprenticeship and was there for 4 years in total. I worked with French car specialist for 6 years and subsequently I worked with different gar...
699 Reviews
Garage serving Hertfordshire, 12 years of experience
I started my career with Kwik-Fit when I was 16 for a number of years understanding the trade. I moved to work for a few independent garages for around 4 years before working with Vauxhall for 3 years and su...
JACCI, London • 2nd June 2020
24 Reviews
Garage serving Hertfordshire, 17 years of experience
Leonardo auto centre is a local family run garage offering a wide range of vehicle repair services . We provide excellent garage services including MOT testing, car servicing and much more.
5 Reviews
Garage serving Hertfordshire, 10 years of experience
I have been a mechanic for 10 year starting my apprenticeship at Uxbridge college. I then developed my skills in a number of Independent garages for 4 years until I decided to open my own business in 2016. I...
DANIEL, London • 19th October 2018
Frequently asked questions about catalytic converter replacement & repairs in Hertfordshire
Read our answers to questions about catalytic converter replacement costs, symptoms and more.
What does a catalytic converter replacement in Hertfordshire involve?
- Mechanic will read the ECU for catalytic converter and oxygen sensor related problems.
- Mechanic will inspect the catalytic converter for damage.
- Mechanic removes oxygen sensor for further check and removal of catalytic converter.
- If necessary, the catalytic converter will be replaced.
- Mechanic will advise if other parts need to be replaced.
- Mechanic will run engine, check catalytic converter operation.
- Mechanic will make adjustments where necessary.
What are the symptoms of a bad catalytic converter?
You'll know something might be wrong with your car's catalytic converter:
- When dark smoke is coming from the exhaust
- When the engine performance is significantly reduced
- When fuel efficiency is decreasing
- When you experience issues while accelerating
- When the smell of sulfur (rotten eggs) is coming from your car
- When the check engine light flashes up
How long does it take to replace a catalytic converter?
On average, catalytic converter replacement times can range from just over 1 hour to 1.7 hours with an average of around 1.2 hours. The time that the job takes will depend on a number of factors, like your vehicle's make and model, year, as well as other factors. Select your car at the top of this page for information on job time and cost for your vehicle through ClickMechanic.
Is a bad catalytic converter an MOT failure?
If the catalytic converter is faulty and emits toxic pollutants above the legal limits then normally the car will fail its MOT.
How to protect your Catalytic Converter from theft in Hertfordshire
There are ways to prevent the theft of your catalytic converter, mainly by making it harder to access and remove it. Below are a few suggestions on how to deter thieves or at least slow them down:
- Parking closer to walls, other vehicles or close to the kerb, to make climbing under your car more difficult.
- Marking the catalytic converter with an engraved serial number can allow easier tracing as well making it harder to sell
- Welding the bolts if the converter is bolted on. This does not stop thieves but makes it harder to remove the converter using only a spanner. The downside to consider is that it not only makes it harder for thieves but also mechanics when they are working on your exhaust system.
- Get a protective cover fitted to make it more difficult for thieves to remove the converter
- Get a catalytic converter alarm which is set off when the catalytic converter is tampered with
- Increased security measures, e.g. if possible park in a lockable garage, fencing, park in well-lit areas or CCTV ?
Why does catalytic converter theft happen in Hertfordshire?
Catalytic converters contain valuable and expensive metals, palladium and platinum, which makes them a target for theft. As the price for these metals increases the numbers of catalytic converter theft go up as well.
As part of the exhaust system, they are relatively easy to access, especially in taller vehicles which are further off the ground.
Catalytic converter theft not only leaves you with the cost of replacing it, but you will also need to take care of any other damages that are caused by the act of removal.
Is catalytic converter checked during an MOT test?
Yes, the catalytic converter will be checked along with other parts of the exhaust emissions system. Depending on the age and fuel type of the vehicle, it will be checked that it meets all the rules regulations in regards to the relevant emission standards.
Can Hertfordshire garages offer home collection and delivery for catalytic converter replacement?
Yes, many garages in Hertfordshire are able to offer collection and delivery for a catalytic converter replacement. With ClickMechanic collection & delivery is free if your vehicle is drivable. Once booked a mechanic will pick up the vehicle on the day and time of your choice, do the work, and return the vehicle at a time convenient to you. Simply enter your vehicle registration number and postcode to get an upfront price for a catalytic converter replacement in Hertfordshire.
Can Hertfordshire mobile mechanics do catalytic converter replacement at my home or office?
Yes, Hertfordshire mobile mechanics can do a catalytic converter replacement at your home or office, provided there is a safe and sufficient space to conduct the repair or replacement. With ClickMechanic, once booked for a date and time of your choice, your booking will be offered to vetted mobile mechanics in your area.
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Mechanics in and around Hertfordshire
- Bracey’s Motors Limited, Hitchin
- Bridge Motors Mobile Repairs, Stevenage
- Collect Service Go, Welwyn Garden City
- Compass Twenty Ltd, Harpenden
- Complete Care, Welwyn Garden City
- D&b Auto Care, Hertford
- Ggf Autos, Stevenage
- Greasy Gorillas Garage, Potters Bar
- Gsw Auto Repair And Tyre Services, Welwyn Garden City
- Jason Wilks, Stevenage
- Jenkins Mechanics, Stevenage
- L.S Auto's, Panshanger
- LA Auto Care Center, Potters Bar
- MARK AND SONS MOBILE MECHANICS LTD, Hitchin
- Mechanix 2 You, Hemel Hempstead
- Mobile Tyreman Limited, St Albans
- NSG AUTOS, Hertfordshire
- QWIKTYRES STEVENAGE LIMITED, Stevenage
- SM MOBILE MECHANIC, Hertford
- ST ALBANS TYRES LTD, London Colney
- Speedy Spanner Ltd, Stevenage
- Spinfix Tyres & Auto Services, Welwyn Garden City
- Steve Hill, Stevenage
- TGPP AUTOCARE, Stevenage