Bob's Mechanical Repairs is a physical workshop in Birnam, Perthshire. We do not have premises in Plymouth. This page is an independent garage guide written by Bob — no Plymouth garage is represented here unless a named, verified partner garage is listed on this page. Bob can give written advice on your vehicle by email; the network is still looking for one verified partner garage in Plymouth.
Read this first if you're a driver in Plymouth
The network behind this page is a workshop in Birnam, Perthshire recruiting independent garages around the country. A garage only gets named once its application has been reviewed. That has not happened in Plymouth yet, so no local garage is represented here.
You can still get a straight answer today: ask Bob online. Warning light, odd noise, failed MOT, or a quote you are unsure about — he replies in writing, and since he cannot do the job in Plymouth there is nothing for him to sell you.
Ask Bob about your car — If you run a garage in Plymouth, you can apply to be the one listed here.
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How this guide works
This page is a reference guide, not a booking page for a workshop in Plymouth. It sets out the typical scope of car servicing, the price range drivers usually see, and the questions worth asking so you can compare quotes properly.
Availability and the final price always depend on the garage you choose. Anything quoted here is a guide figure taken from typical UK independent-garage pricing, not an offer.
How to choose a garage in Plymouth
Check the garage is on the DVSA register if you need an MOT, ask whether the technicians are IMI or City & Guilds qualified, and look for recent reviews that mention the same kind of work you need doing.
Ask for a written quote before any work starts, ask whether old parts can be shown to you afterwards, and confirm that servicing will be recorded to the manufacturer schedule so a warranty stays intact. A garage that will not put a price in writing is not worth the risk.
Questions worth asking before you book
Is the quoted price inclusive of parts, labour and VAT? Will diagnostic time be credited against the repair if you go ahead? What happens if extra faults are found once the car is stripped? How long will the car be off the road?
On older vehicles it is also worth asking whether the garage will supply a photo or video of anything they say needs replacing. Some garages can provide this — it is worth asking.
Driving conditions around Devon
Local roads shape what wears out first. Where you have a lot of stop-start traffic, brakes and clutches go early; on rough rural surfaces it is suspension and tyres; near the coast it is corrosion. Mention the kind of driving you do when you get a quote — it changes what a garage should be checking.
Bob's advice for Plymouth drivers — from the Birnam workshop
Robert McMahon — Bob to customers — has been a mechanic for 32 years and runs Bob's Mechanical Repairs in Birnam, Perthshire. He cannot work on your car in Plymouth, and this page never pretends otherwise. What follows is the advice he gives across the counter every week about car servicing: what the job involves, what it should cost, and where drivers get caught out. It applies the same whether the car is on his ramp or on someone else's.
Batteries, charging and the electrical faults that fool people in Plymouth
A car that cranks slowly on cold mornings and throws unrelated warning lights is usually telling you about the battery, not about the lights. Modern cars with stop-start need an AGM or EFB battery, and fitting a standard one is a false economy — it will be flat within a year. Budget £110–£220 for the right battery, plus a small charge where the battery has to be coded to the car.
If a battery keeps going flat while the car is parked, that is a parasitic drain and it needs a proper current-draw test, not a new battery. It is an hour or two of diagnostic work and it is worth paying for. Ask any Plymouth garage quoting for car servicing whether they can do a drain test before they sell you a third battery.
What to do when you think you have been overcharged
Do not argue at the counter. Get the invoice itemised, ask for the old parts back, and take photographs of anything the garage says failed. Under the Consumer Rights Act 2015 work has to be carried out with reasonable care and skill and at a reasonable price where none was agreed in advance, and an itemised invoice is what makes that arguable.
If it stays unresolved, the Motor Ombudsman handles complaints about garages signed up to its code, and a second written opinion on the same fault is worth having first. Bob will read a Plymouth quote and tell you in writing whether the price and the work stack up — he has no interest in the outcome, because he is not the one doing the job.
Warning lights: what to stop for and what can wait
Red means stop as soon as it is safe: oil pressure, coolant temperature, brake system, charging. Driving on with an oil pressure light is how engines die in a mile. Amber means get it looked at soon — engine management, ABS, tyre pressure, glow plug.
A flashing engine management light is the exception to "amber can wait": it usually means a misfire that is dumping raw fuel into the catalytic converter, and that converter is the expensive part. Pull over, get it recovered, and save yourself £600–£1,200.
The short version
The work has to be done where you are, but the judgement does not. Send Bob the symptoms, the codes or the estimate from your Plymouth garage and you will get a straight written answer.
Frequently asked questions
Does Bob's Mechanical Repairs have a garage in Plymouth?
No. Bob's workshop is in Birnam, Perthshire. This page is an independent guide for Plymouth drivers. No Plymouth garage is represented here unless a named, verified partner garage is listed on the page.
How much should car servicing cost in Plymouth?
Use the guide prices on this page as a starting point only. Prices vary between independents and main dealers, and the final figure depends on the vehicle and the garage you choose. Compare like-for-like written quotes and always get the price in writing first.
Can I still get advice from Bob?
Yes — Bob can give written advice on a fault, a warning light or a quote you have been given, wherever you are in the UK. What he cannot do is carry out the work in Plymouth.
Are there other garage guides near Plymouth?
Yes — this site publishes guides for other towns in Devon and across the UK. They follow the same format: typical prices, what to check, and how to choose a garage.
Garage owners in Plymouth
How do independent garages in Plymouth win work online?
Ranking in Plymouth comes down to answering the questions drivers actually type before they book — cost, timescale, what's included. Chains do that at scale; most independents never get the chance. This guide does it for car servicing, and one Plymouth garage can apply to be the workshop named on it once the application has been reviewed.
How do I get my workshop onto the Plymouth guide?
Yes — one garage per town. Apply through the garage partnership form and Bob reviews it personally. If approved and activated, your workshop name, contact details and website appear on this page, and eligible enquiries may be offered under the agreed partnership terms. No long contract, cancel any time.
Is there anything beyond the listing itself in Plymouth?
Two things: the named listing on this page, and the software Bob's own garage runs on — job cards, MOT reminders, invoicing and customer records. Both start only once the application has been reviewed, approved and activated, and no volume of enquiries is promised before that.
Apply to list your Plymouth garage
Questions drivers in Plymouth ask most
- How much does a car service cost in the UK?
- Do I need to service at the dealer to keep the warranty?
- How much does a cambelt change cost?
- How often should brake fluid be changed?
- How often should the air filter be changed?
- How long do brake pads last?