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Services DPF Regeneration HHO Carbon Clean Pricing Reviews Raffles Book Appointment
📞 07703 660958 💬 WhatsApp Us Book MOT — £49.99
Big Al's Motors — Professional Automotive Garage
DVSA Registered London N18 Same-Day MOT

Big Al's
Motors

MOT · Servicing · DPF Regen · Repairs

Your local garage you can trust. Honest diagnostics, fair pricing, and a team that respects your time. We explain before we fix — every time.

Book MOT — £49.99 WhatsApp Us 07703 660958
200+ 5-Star Reviews
10+ Years Experience
5000+ Cars Serviced
4.9★ Google Rating
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DVSA Registered Testers
Same-Day Slots Available
Free Re-test Within 10 Days
12-Month Parts & Labour Warranty
Text Updates Throughout
Fixed Quotes — No Hidden Charges
What We Do

Professional Garage Services

For all makes and models. Honest diagnostics, fair pricing, and a local team that respects your time.

MOT Testing

MOT Testing

DVSA-registered Class 4 & 7 MOT tests. Clear reports, no unnecessary upsells. We show you photos and explain priorities.

Class 4 & 7 From £49.99
Book MOT
Car Diagnostics

Full Diagnostics

Dealer-level diagnostic scanning for all makes and models. Engine lights, fault codes, pre-MOT checks — accurate and transparent.

All Makes Warning Lights
Get a Quote
Car Servicing

Interim & Full Service

30-point interim and 60-point full service. Oil & filter, fluids, brakes, tyres, belts — everything checked and reported.

From £89 Most Popular
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Brakes & Repairs

Brakes & Repairs

Brakes, suspension, exhausts, batteries, timing belts — done right the first time with quality parts and a 12-month warranty.

12-Month Warranty
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Tyres & Wheels

Tyres & Wheels

Tyre supply and fitting for all sizes, wheel alignment, balancing. Budget to premium brands. Can't get to us? Ask about local collection.

All Sizes Alignment
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All Makes & Models

All Makes & Models

From city cars to vans — we service everything. Petrol, diesel, and hybrid vehicles welcome. Dealer-level equipment, independent prices.

Petrol & Diesel Hybrid
Contact Us
DPF Regeneration Service
Specialist Service
DPF Specialist

DPF Regeneration

Diesel Particulate Filter blocked? Don't replace it yet. Our professional DPF regeneration service can save you hundreds of pounds.

Warning Light On? Don't ignore DPF warnings. Driving with a blocked filter can cause expensive engine damage. Book a regeneration today.

We use dealer-level diagnostic equipment to perform forced regeneration, cleaning your DPF and restoring performance without the cost of replacement.

  • Forced regeneration using dealer-level equipment
  • DPF cleaning and full inspection
  • Diagnostic scan for underlying issues
  • Expert advice on preventing future blockages
  • Save hundreds vs. full DPF replacement
Call to Book WhatsApp Us
Advanced Engine Cleaning

HHO Carbon Cleaning

Revolutionary hydrogen-powered engine decarbonisation. Non-invasive, safe, and effective — recommended every 30,000 miles.

What is HHO Carbon Cleaning?

HHO (Hydrogen-Hydrogen-Oxygen) carbon cleaning is a revolutionary, non-invasive process that uses hydrogen gas to safely remove carbon deposits from your engine's internal components. Unlike traditional chemical cleaners, HHO cleaning is completely safe for your engine and produces zero harmful byproducts.

1

Connect to Engine

We connect our HHO machine to your engine's air intake system.

2

Generate HHO Gas

The machine produces hydrogen and oxygen gas through electrolysis of distilled water.

3

Deep Clean

The HHO gas is drawn into the engine, where high temperature converts it to steam that blasts away carbon deposits.

4

Results

Your engine is carbon-free, running smoother, more efficiently, with restored performance.

Starting from £150 per session. Price varies by engine size. Contact us for a quote.

HHO Carbon Cleaning Machine

Restored Performance

Removes carbon deposits from intake valves, pistons, and combustion chambers, restoring lost engine power.

Reduced Emissions

Cleaner engine means fewer harmful emissions. Helps your car pass MOT emissions tests with ease.

Better Fuel Economy

A clean engine burns fuel more efficiently. Customers typically see 5–15% improvement in MPG.

Smoother Running

Eliminates rough idling, hesitation, and flat spots. Your engine will feel like new again.

Prevents Engine Damage

Carbon buildup can cause expensive damage over time. Regular cleaning protects your investment.

Extends Engine Life

Keep your engine clean and running optimally for longer. Recommended every 30,000 miles.

Big Al's Motors Team
200+
5-Star Reviews
Why Choose Us

Why Drivers Trust Big Al's

We explain before we fix. We photograph what we find. We stick to the quote. Our technicians are trained to the highest standards and we invest in the latest diagnostic equipment to ensure accurate, efficient service every time.

Fixed Quotes

No hidden charges. The price we quote is the price you pay.

12-Month Warranty

All parts and labour backed by a full 12-month warranty.

Local Team

You'll speak to the same people every time. No call centres.

Text Updates

We text you when your car is ready. No chasing required.

Simple Pricing

No Surprises. Ever.

Add services and see the total before you book. Additional repairs are always quoted separately — we'll always ask before proceeding.

MOT Test
£49.99
Class 4 MOT Test
DVSA-registered MOT test with clear results and no unnecessary upsells.
  • Free re-test within 10 days
  • DVSA registered testers
  • Same-day results
  • Class 4 & Class 7 available
  • Photo evidence of any issues
Book MOT
Interim Service
£89+
Oil & filter, checks, report
Recommended every 6 months or 6,000 miles. Keeps your car running safely between full services.
  • 30-point inspection
  • Oil & filter change
  • Fluid top-ups
  • Brake & tyre check
  • Written health report
Book Service
Most Popular
Full Service
£179+
Full inspection, fluids, filters
Recommended annually. The complete health check for your vehicle — everything inspected, replaced, and reported.
  • 60-point inspection
  • Oil, filter & air filter
  • All fluid checks & top-ups
  • Spark plugs (petrol)
  • 12-month parts warranty
  • Full diagnostic scan
Book Full Service

Specialist Service Pricing

DPF Regeneration POA
HHO Carbon Clean From £150
Full Diagnostics POA
Brake Pads (per axle) From £79
Tyre Fitting (each) From £15
Wheel Alignment From £35

All prices exclude parts unless stated. Call or WhatsApp for a precise quote on your vehicle.

Customer Reviews

What Local Drivers Say

4.9
★★★★★
from 200+ Google reviews
Read all reviews →
★★★★★

Booked online in 2 minutes. Car was ready early. Couldn't be easier! The team were brilliant and explained everything clearly.

S
Sarah M.
Marlow
★★★★★

They showed me the worn parts before replacing anything. Total transparency — exactly what you want from a garage. Will definitely be back.

J
James T.
High Wycombe
★★★★★

Fair price, honest team. I've been back three times now. Big Al's is the only garage I trust with my car. Highly recommend to everyone.

P
Priya K.
Bourne End
★★★★★

Finally a garage that texts updates without me having to chase. Great service, great price. My DPF issue was sorted same day!

T
Tom R.
Cookham
★★★★★

Had my HHO carbon clean done here. The difference in how the engine runs is remarkable. Smoother, more responsive, better fuel economy. Worth every penny.

D
David L.
Edmonton
★★★★★

MOT passed first time. Friendly staff, clean workshop, and they didn't try to sell me anything I didn't need. Refreshing honesty from a local garage.

A
Amanda H.
Tottenham
Read All Google Reviews
Coming Soon

Car Raffles

Win your dream car for just a few pounds! Our exciting car raffles are launching soon.

🏆
COMING SOON

First Car Raffle

We're preparing something special! Our first car raffle will feature a quality vehicle at an incredible price. Sign up below to be notified when tickets go on sale.

TBA
Ticket Price
TBA
Draw Date
LIVE
Instagram Draw

Follow @bigalsmotors for updates

🚗

Fully Serviced Cars

Every raffle car comes fully serviced with a current MOT.

✨

Professionally Valeted

All cars are professionally cleaned inside and out before the draw.

📱

Live Instagram Draw

Transparent live draw on Instagram. Winner announced within 24 hours.

Book Appointment

Get in Touch

Choose your service and preferred time. We'll confirm by text within 30 minutes.

Monday – Friday 09:00 – 18:00
Saturday 09:00 – 13:00
Sunday Closed
Get Directions on Google Maps
Book MOT
Service / Repair
MOT Test — £49.99 · Free re-test within 10 days if needed

We'll confirm your slot via WhatsApp within 30 minutes

For servicing, repairs, DPF regen, and diagnostics, please use the form below. This helps us schedule the right amount of time for your job.

We'll respond within 30 minutes during opening hours

Prefer to contact us directly?

Call Us WhatsApp

Ready to Book Your MOT?

Same-day slots available. DVSA registered. Free re-test within 10 days.

Book MOT — £49.99 07703 660958
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