Car Battery Replacement Tullamarine
Slow crank, dashboard warnings, dying after a few days off? We test, supply and fit batteries — including start-stop AGM and EFB — for all makes at 6 Garden Drive.
Car Battery Replacement and Charging System Health
Replacing a car battery used to be a 10-minute job. On a modern car it can still be — or it can require coding the new battery to the body control module so the start-stop system, charging strategy, and battery management all know what's installed. Get it wrong and the new battery either won't charge fully or wears out fast.
At 6 Garden Dr we stock conventional flooded batteries, AGM (Absorbed Glass Mat) batteries for start-stop cars, and EFB (Enhanced Flooded Battery) variants. We test before we replace — free battery health check any time you're in. About 30% of cars that come in for a 'flat battery' actually have a working battery and an alternator problem, a parasitic drain, or a corroded earth strap. We find the real cause.
Common battery work for Tullamarine, Gladstone Park, Westmeadows and Airport West customers: BMW, Audi, VW and Mercedes start-stop cars needing AGM replacements with BMS coding; older Holden, Ford, Toyota and Mazda needing conventional batteries; cars that have been sitting and won't crank; and dual-battery setups for 4WDs and utes.
What's Included in Every Car Service
Every battery replacement at our Tullamarine workshop includes a charging system test, a parasitic drain check if needed, and proper coding for start-stop and BMS-equipped cars.
Car Battery Services We Handle
From a quick health check to a full replacement with the right CCA rating — every battery and charging system job covered at our Tullamarine workshop.
Battery Testing & Health Check
Load test, cranking amps, and state-of-charge measured with proper test gear — not just a 12.6V reading on a multimeter. We tell you whether the battery's genuinely failing or whether it's something else on the system.
Battery Replacement
Right CCA rating, right group size, right terminal layout — fitted to spec for your make and model, including stop-start AGM and EFB units. Old battery recycled responsibly. Most fits done while you wait.
Parasitic Drain Diagnosis
Battery flat after sitting overnight? We measure current draw on each circuit with the car asleep and trace the offending fuse. Common culprits: glovebox lights, aftermarket stereos, faulty BCMs. We find it.
Charging System Check
Alternator output tested under load, voltage regulator checked, drive belt and pulley inspected. A new battery won't last on a charging system that's undercharging or overcharging — we test both sides of the equation.
Terminal & Cable Repair
Corroded terminals cleaned back to bare metal, damaged battery cables replaced, earth straps checked for resistance. Loose or corroded connections cause more no-starts than dead batteries — we sort both.
Stop-Start & AGM Coding
Modern stop-start cars need the new battery coded to the BMS so it charges correctly — fit a battery without coding and the system thinks it's still old. We code AGM and EFB replacements on the scan tool.
Certifications & Memberships
Why Locals Choose ASL Auto Works
4.9 stars across 182 Google Reviews. Tullamarine drivers know we'll tell them whether they actually need a new battery — or whether the alternator is the real culprit.
Upfront Pricing
We tell you the cost before we start. No hidden fees, no surprises on the invoice.
Honest Advice
We explain what your car actually needs — not what pads the bill. Sai and the team keep it real.
All Makes & Models
Japanese, European, American, 4x4s, fleet vehicles. If it has wheels, we can service it.
Fast Turnaround
We know you need your car back. We work efficiently and keep you in the loop from drop-off to pick-up.
What Our Customers Say
“Sai provided excellent service for my Roadworthy Certificate. The inspection was completed quickly and professionally, and everything was explained clearly. The process was smooth, honest, and hassle-free from start to finish. Highly recommend to anyone needing a Roadworthy Certificate done properly and fast.”
“Sai is the best — if you want to know what's really going on with your car, he's your guy. Patient, thorough, and fair prices. He gave me full evidence of parts replaced and a good inspection. Everyone deserves a proper explanation of how their car is doing.”
“Best service I've ever received. As someone who doesn't know much about cars, I was impressed with how clearly the mechanic explained what needed repairing — they even showed me pictures. I truly felt like I could trust them completely. A trustworthy and reliable place.”
Ready to Book?
Book online in minutes or give us a call. We're open Mon–Fri, 8am–5pm.
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Common Questions
Straight answers to what most customers ask.
Find Us
We're easy to find in Tullamarine, just minutes from the airport.
Address
6 Garden Dr, Tullamarine VIC 3043
Heads up: the storefront entry is on Garden Drive — not Rosto Court.
Hours
- Monday – Friday8:00am – 5:00pm
- SaturdayClosed
- SundayClosed
Phone
03 9650 2890Areas We Serve
Battery customers come to us from these suburbs: