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My promise to you: a flat quote before I touch anything, no hourly meter, no mystery markup. I show you the old parts when I'm done. No tow, no waiting room, no surprise on the bill.

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Mobile auto repair across Mississauga, Oakville, Milton, Brampton and Etobicoke. Send it and you get a price range on the spot, plus real time slots you can book yourself.

Straight answer, no runaround At your driveway Flat quote before we start

Prefer to talk? Call or text 647-450-0406. Text anytime, he reads them between jobs.

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You Supply the Part · Honest pricing guide

"I Bought a Battery. Will You Install It?"

By Fares · Updated August 17, 2026 · 4 min read · Mobile. Mississauga, Oakville, Milton

The straight answer: Yes, and there's one thing about this job worth knowing before you buy: on most 2015-and-newer cars the new battery has to be registered or coded to the car, or the charging system keeps treating it like the old worn one and shortens its life. Same for AGM versus flooded, many start-stop cars require AGM, and a cheaper flooded battery in that car will not last. Send me the battery you bought and your year, make and model and I'll tell you if it's the right spec, free, before I come out. Flat labour quote first, terminals cleaned, charging system tested after. Cars With Fares comes to your driveway across Mississauga, Oakville, Milton, Brampton and Etobicoke, get a flat quote or text 647-450-0406.

Text beats a form if you're on your phone, the message above is already written, you just add your car. He reads texts between jobs.

Batteries feel like the one job anyone can do, and on a 2006 Corolla it basically is. On a 2019 anything, it often isn't, not because the wrench work is hard, but because the car needs to be told. Battery registration, AGM requirements, and memory-saver steps so you don't lose the radio, the window calibration or an idle relearn have quietly turned a five-minute swap into a job with steps.

I'm Fares, a mobile mechanic working across Mississauga, Oakville, Milton, Brampton and Etobicoke, and batteries are constant work, usually on the side of the road or in a driveway where the car finally refused to start. If you already bought the battery, this is as close to pure labour as a job gets.

Here's what to confirm about the battery you bought, why the charging system gets tested afterwards, and how to get your labour number in one text.

What the same job costs full-service at a shop (2026)

You've bought the battery, so this is the full-service version for context, honest GTA shop and dealer ranges with the battery included. When you supply it, what's left is labour, and you get that flat number before any work:

ScenarioWhat's involvedTypical GTA shop/dealer cost
Standard flooded battery, installedQuality battery, terminals cleaned, old battery taken for recycling$180 – $450
AGM / start-stop battery, installedThe spec many 2015+ cars require, not an upgrade, a requirement$350 – $650
Charging system test (before any parts)Battery, alternator output under load, cable voltage drop$50 – $150
Why the ranges are wide. Most of the spread above is the battery itself, which is exactly why buying your own moves the number. What's left is labour plus the steps that make it stick: terminals cleaned and protected, hold-down properly torqued, registration or coding if your car needs it, and a charging-system check so you're not back here in eight months with a second dead battery. Holding a quote already? Run it through the free quote checker, or compare more jobs on the GTA repair price index.

And what do I charge?

Fair question, it's the one nobody answers. Here's my published band beside the market's, so you can see both before you talk to anybody:

What I charge, and what the market charges
GTA shops & dealers $50–$650

The full spread from the table above, smallest scenario to biggest. Market context so you can tell fair from silly, not my price, and I have no say in what a shop bills.

Cars With Fares, published, flat Labour only, flat, before any work

The part is already yours, so there's no parts line at all. I check it fits your car for free, then give you one flat labour number by text before I touch anything. For reference, my published band for this job including the part is $180–$1,100 installed & tested.

Standard flooded battery, installed (shop)$180–$450
AGM / start-stop battery, installed$350–$650
Reman alternator, common car (shop installed)$550–$800
New OEM-grade alternator (shop installed)$700–$1,100
European or buried alternator$900–$1,800+
Read the two columns properly: they overlap, and I'm not claiming to be the low-price option. What's different is how you get quoted. A shop bills you per line item, usually after the car is already on the hoist. I give you one flat number for the whole job, parts and labour together, before any work starts, at your driveway. No hourly meter, nothing added afterwards, and if something doesn't need doing I tell you that instead of billing it. My numbers are published at /data/consumer-rate-card.json (updated 2026-07-19) so you can check them against this page, your car and the job's scope decide where in the band you land.

Want that number for your car?

Thirty seconds. You get a price range back plus real time slots you can book yourself, no waiting on a callback to find out the price.

No spam. A real read on your car, not a sales call. Or text 647-450-0406.

What actually drives the price up or down

When two people pay wildly different amounts for the "same" job, these are the reasons, and they're the reasons your flat quote lands where it lands:

Whether your car needs the battery registered or coded

Most 2015-and-newer cars, and BMW, Mercedes, Audi and VW well before that, run a battery-monitoring strategy that has to be reset when a new battery goes in. Skip it and the car keeps charging on the old battery's ageing profile, which shortens the new one's life and can hold back start-stop. It's a scan-tool step, not a wrench step, and it's part of doing the job properly.

AGM versus flooded, a requirement, not an upgrade

Many start-stop cars specify AGM. It costs more, and it isn't optional: a flooded battery in an AGM application gets cycled harder than it's built for and dies early. If you bought flooded for a car that wants AGM, I'd rather tell you while it's returnable than fit it and watch it fail in a year.

Group size, terminal layout and hold-down fitment

Group size decides whether it physically fits the tray and whether the terminals land on the right side for the cables to reach. A near-miss here means a cable stretched to its limit or a hold-down that won't clamp, and a loose battery is a genuine hazard. A photo of the label plus your car and I'll confirm it before you're stuck.

Where the battery actually lives on your car

Not always under the hood. Plenty of cars put it in the trunk, under the rear seat, or in a wheel well behind a liner, some need a cowl panel or an airbox out of the way first. That access is the labour variable, and it's why I quote per car after you tell me the year, make and model.

Whether the battery was even the problem

A battery that keeps dying is often a charging or drain problem wearing out batteries one after another. That's why I test alternator output and look for a parasitic drain after fitting, not just hand you the keys. Replacing batteries into a bad charging system is an expensive loop, and it's a very common one.

Before I fit it: what's worth confirming

How urgent is it?

MEDIUM to HIGH, a weak battery picks the worst moment

The car is fine to drive once it's running; the risk is not getting it started again. A battery giving slow cranks or needing a jump is on its last stretch, and cold weather ends that stretch early. Don't park somewhere that matters and don't count on it after the car has sat a couple of days. If you've already got the battery, there's no reason to wait, this is the fastest job on the whole page.

Landed here from a symptom? Read what's actually causing it

How the flat quote works at your driveway

No shop bay, no waiting room, no "while we're in there" upsell. I come to your driveway or workplace lot, confirm what your car actually needs, and give you one flat number before any work starts, parts and labour, no surprises. If something doesn't need doing, I tell you that too; the trust is worth more to me than the extra line item. I handle mobile battery replacement across Mississauga, Oakville, Milton, Brampton and Etobicoke.

What to do next

  1. 1Photograph the battery's label, group size, CCA and date code, and send it with your year, make and model.
  2. 2Tell me if the car has start-stop, and if you know, whether the old battery was AGM.
  3. 3Say what's happening: slow crank, needs a jump, dead after sitting, or a second battery in two years.
  4. 4You get a flat labour number back, including registration or coding if your car needs it.
  5. 5Pick a window and I come to the car. I clean and protect the terminals, torque the hold-down, and test the charging system before I leave.

Bought a different part? Same deal

Same arrangement across the board: flat labour quote first, fitment checked free before I start, my labour warrantied, the part stays under whoever sold it to you.

Frequently asked questions

Will you install a battery I bought at a parts store?

Yes, send me a photo of the label plus your year, make and model and you'll get a flat labour number back. I check the spec free first, because two things catch people out: group size and terminal side (does it fit and can the cables reach), and AGM versus flooded (many start-stop cars require AGM and a flooded battery in one dies early). My labour is warrantied by me; the battery's warranty stays with the store.

Does a new battery need to be registered to the car?

On most 2015-and-newer cars, and on German cars well before that, yes. The car tracks the battery's age and adjusts charging accordingly, so a new battery fitted without a reset gets charged on the old one's ageing profile, which shortens its life and can disable start-stop. It's a scan-tool step that takes minutes, and skipping it is one of the quiet reasons new batteries fail early.

Can I put a flooded battery in a start-stop car to save money?

I'd advise against it and I'll tell you why rather than just refusing. Start-stop cycles a battery far harder than a normal car does, and AGM construction exists to survive that. A flooded battery in that application typically dies well inside its warranty, so the money saved comes back out, plus another appointment. If the car specifies AGM, buy AGM.

Why does my battery keep dying even though it's new?

Because the battery usually isn't the disease. Two common culprits: an alternator that isn't fully recharging it, so every start begins from a deficit; and a parasitic drain, a module or accessory that never goes to sleep, pulling it flat overnight. Both wear out batteries one after another. That's why I test charging output and look for a drain after fitting, not just collect the keys.

Can you replace a battery where my car is stuck?

That's most of the battery work I do, driveways, workplace lots, side streets, wherever the car decided it was done. I come to you across Mississauga, Oakville, Milton, Brampton and Etobicoke, fit the battery you bought, clean and protect the terminals, register it if your car needs that, and test the charging system before I leave. Flat labour quote before any work.

Want one flat number for YOUR car?

Every range above is a guess until someone looks at your actual vehicle. Send me the details, or ask the AI mechanic and it opens straight onto this question, and you'll get an honest flat quote, then the job done right at your driveway. mobile battery replacement across Mississauga, Oakville, Milton, Brampton and Etobicoke.

One text and you have a number. He reads them between jobs.

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