What we do
Auto Electrical Services in Merrylands
From starter motors and alternators to air conditioning and alcohol interlocks, our workshop at 173 Pitt St covers the lot — drop and run, we’re only 2 minutes’ walk from transport, the station and the shopping centre.
Auto Electrics
Starter motors, alternators, wiring, central locking, electric windows and cruise/traction control repairs.
Diagnostics
SRS, ABS and engine fault finding with G-Scan 2 multifunctional diagnostic equipment.
Air Conditioning
Regas, leak testing and air-con repairs for all makes and models — from $170.
Smart Start Interlocks
Approved Smart Start installation, servicing and training for NSW interlock drivers.
Car Batteries
Testing, supply and fitting for cars, 4WDs, caravans and commercial vehicles.
Car Lighting
LED upgrades, driving lights, work lights and globes from the brands you trust.
4WD Equipment
Dual battery systems, brake controllers, solar and REDARC vehicle management.
Accessories
Reversing sensors, keyless entry, phone kits, tyre pressure monitors and more.
Why M&J
Why Western Sydney drivers choose M&J
We’ve been established since 1980, servicing customers from all over Sydney. We’ve seen cars and their technology change with every new model — and we’ve adapted, with all the modern equipment needed to service your car.
46+ years of experience
Dedicated to delivering the highest quality of service since 1980.
All makes & models
Australian, European, American, Japanese and Korean — including commercial vehicles.
Modern equipment
G-Scan 2 diagnostics, on-board control module testing and complete ECU repairs.
Easy to reach
2 minutes’ walk from Merrylands station, transport and the shopping centre.
NSW Alcohol Interlock Program
Get back on the road with a Smart Start interlock
Proudly distributing Smart Start Interlocks Australia: professionally installed without damage, fully qualified auto electricians, easy-to-use devices and 24/7 phone support. Smart Start is one of five suppliers accredited by Transport for NSW — and we guide you through the program from first install to removal.
Program rules and eligibility: Alcohol Interlock Program — NSW Government
Get the green light
The court orders an interlock and Transport for NSW writes to you — call 13 22 13 to confirm you’re eligible to install.
Book your install
We install your Smart Start, usually within 1–2 hours. You receive your Installation Certificate on the spot.
Drive & service
Zero blood alcohol applies while the device is fitted. We service it every 30–60 days at our Pitt St workshop.
Finish the program
After your end-of-program review, we remove the device — no damage, no marks, back to normal.
Reviews
Rated 4.3 out of 5 by drivers across Sydney
Good to know
Frequently Asked Questions
Straight answers on pricing, timing and how we work. Can’t see your question? Call us on (02) 9637 3605.
How much does car electrical diagnostics cost?
An inspection starts from $55 at M&J Auto Electrics. The final cost depends on the fault found and the repair required — we’ll quote you before any work begins.
How much does a Smart Start interlock cost?
Interlock rental starts from $126 a month, our cheapest concession rate (conditions apply). Installation costs depend on your vehicle and your program, so call us and we’ll walk you through it.
How much does a car air conditioning regas cost?
Air conditioning regas starts at $170. The price can vary depending on your vehicle and how much refrigerant is needed.
Do your repairs come with a warranty?
Yes. All our repairs carry a warranty: 12 months on labour, and most new parts come with at least a 12-month warranty. Parts warranties vary by manufacturer, so we’ll confirm yours when we quote.
How long does a SmartStart Interlock installation take?
Installation typically takes 1–2 hours depending on the vehicle. Please book in advance to arrange the installation.
How long does a car air conditioning regas take?
A standard regas takes around 45–60 minutes. If there’s a leak or a fault in the system, diagnosis and repair will add time.
Do you service all areas of Sydney?
We are based in Merrylands, which is in Western Sydney, and we see customers from across the greater Sydney region.
What makes an auto electrician different from a regular mechanic?
Auto electricians specialise in vehicle electrical systems — wiring, sensors, batteries, alternators, and electronic modules — which most general mechanics don’t diagnose in depth. M&J Auto Electrics focuses exclusively on electrical work, so faults get found faster and fixed correctly the first time.
What are the signs my car has an electrical fault?
Common signs include a warning light on your dash, a car that won’t start or starts intermittently, flickering lights, or a battery that keeps going flat. If any of these happen, an inspection starting from $55 will identify the cause.
Why is my check engine light on?
A check engine light means your vehicle’s computer has logged a fault code — it could be anything from a faulty sensor to an emissions issue. A diagnostic scan will read the exact code and tell you what needs fixing.
Where is M&J Auto Electrics located?
We’re at 173 Pitt St, Merrylands NSW 2160. We’re open Monday to Friday, 8:00am to 4:30pm — call us on (02) 9637 3605 to book.
How do I book my car in?
Call us on (02) 9637 3605 or send a booking request through the form on our contact page with your vehicle details and the problem you’re having. We’ll call you back to confirm a time.
What payment methods do you accept?
We accept cash and card payments at our Merrylands workshop.
More questions about interlocks? Read the full alcohol interlock FAQ →
Authorised & accredited
The brands we’re trusted with
Smart Start authorised dealer · MTA NSW member · Philips and REDARC stockist
Where we serve
Merrylands workshop, serving all of Western Sydney
You’ll find us at 173 Pitt St, Merrylands — the heart of the Cumberland area, about 25 km west of the Sydney CBD and a two-minute walk from Merrylands station. Drop the car with us and you’re moments from shops, cafés and transport. We regularly welcome drivers from across greater Sydney.
Contact
Book in your vehicle today
Drop in, call, or send the form — we’ll get back to you quickly with a straight answer.
Send us a message and we’ll get back to you, or call (02) 9637 3605.