If your car’s just blown a head gasket or started making sounds like a blender full of bolts, you might be wondering — “How much does it cost to replace an engine?” It’s one of those big-ticket repairs that can make or break whether your vehicle’s worth saving. And spoiler alert: it’s rarely cheap.
In this guide, we’ll dig into average engine replacement costs across Australia, what affects the final bill, and whether it’s worth sinking that kind of money into an older car — or calling it quits and exploring other options.
Motor Carked It? We’ll Tow the Lot
That loud rattle, loss of power, or black smoke puffing out the back? Yeah, it’s probably not just a dodgy fuel pump. Engine issues can sneak up slowly — or knock the whole car out overnight.
Here are some of the most common signs of engine failure:
- Amber-coloured engine icon functions (AKA Check Engine light)
- Blue smoke from the exhaust (internal engine damage)
- Knocking from worn-out bearings or a busted timing belt
- Constant overheating (could be a broken water pump)
- Grinding starter motor or failure to turn over
Once you’ve ticked a few of those boxes, you’re probably not far from needing a replacement engine.
Replacement Costs in Australia
Now for the million-dollar question (or hopefully just a few thousand): What’s the cost of engine replacement?
Well, it depends on a lot — your type of vehicle, engine size, whether you want a second-hand engine or a remanufactured engine, and how complicated your engine variant is. Some newer models have advanced engine technology that adds hours of labour.
Here’s a general breakdown:
| Vehicle Type | Replacement Engine Cost (New) | Second-hand / Remanufactured | Labour Costs (5–12 hours) |
|---|---|---|---|
| Small petrol hatch (e.g. Mazda 2) | $3,000 – $6,000 | $2,000 – $4,000 | $600 – $1,800 (@ $120–$150/hr) |
| Mid-size sedans (e.g. Camry) | $4,500 – $7,500 | $3,000 – $5,500 | $800 – $2,000 |
| Utes / 4WDs (e.g. Hilux) | $6,000 – $10,000 | $4,000 – $7,000 | $1,000 – $2,500 |
| European cars (e.g. BMW) | $8,000 – $20,000+ | $6,000 – $15,000 | $1,500 – $3,000+ |
| Hybrid engines / EVs | $12,000 – $25,000+ | Often not viable | High—needs specialist shop |
Note: These average costs include both the entire engine and associated labour. High-tech, complex components like fuel injectors, wiring harnesses, and belt tensioners can add to the cost of engine replacement.
Why Is Engine Replacement So Costly?
You’re not just swapping one big part. You’re likely replacing critical components that link to:
- The engine mount and motor mounts
- Drive shaft, starter motor, water pump, and exhaust valves
- Cam belt breaking and damaging internal engine components
- Advanced technology needs ECU reprogramming
- Fluids like engine oil, coolants, and clean fuel filter replacements
Then there’s the time — up to 12 billable hours at most auto repair shops — and the Labour costs rack up fast.
Fix It, Swap It, or Ditch It?
You’ve got three main options:
- Brand-new engine:
- Ideal for luxury vehicles or cars under extended warranties
- Best reliable service, but most expensive
- Long delivery time for some imports
- Remanufactured or second-hand engine:
- Mid-tier choice with moderate cost of replacement
- Available locally from wreckers or auto mechanic networks
- Must come from reputable mechanics — avoid dodgy imports
- Engine swap from a wrecker:
- Budget-friendly (cheap engine), good for old cars
- May void warranty or not suit the engine bay layout
- Always check compatibility (engine mounts, fuel mixture, battery cables, etc.)
Likely Extra Repair Costs
Replacing the engine doesn’t mean the rest of the car is golden. You may also need:
- Engine Mount Replacement (especially if it’s been shaking or clunking)
- Starter motor replacement costs (if you’ve burnt it out trying to start a dead block)
- Motor Mount Replacement Cost (yes, separate to engine mounts — thanks car design…)
- Timing belt replacement (often required on used or rebuilt engines)
- Replacement fuel pump, drive belts, or cleaning out coolant lines
If you’re unlucky, your entire engine failure may have led to internal damage in the transmission or exhaust systems. Always factor in $1,000–$2,000 for Additional Repairs when budgeting.
When to Skip Replacement
We’ve seen folks throw $5,000+ Labour costs into cars worth less than the tyres they sit on. Unless you’re dealing with a powerful engine in a late-model car with good resale, it might be time to cut your losses.
Worth It:
- You’ve got an internal combustion engine under a comprehensive warranty
- You’re emotionally attached (hey, we’ve seen it)
- You’re using a personal loan or paying through monthly payments
Not Worth It:
- It’s blowing blue smoke, rusted out, and full of mechanical failures
- The quote includes additional labour charges or parts with unknown delivery times
- You’re already battling advanced engine issues (not just the block)
If You Don’t Replace the Engine
Skip the stress. Sell your old car to us — Old Cars Removed in Melbourne.
We take:
- Cars with seized, broken or missing engines
- Burnt-out engine bays
- Wrecks with blown cam belts or failed motor mounts
- Utes that ran fine until they didn’t — now just sitting in the backyard under a tarp
We’ll tow it for free, pay cash on the spot, and handle all the VIC rego paperwork. No worries.
Real Costs We’ve Seen on the Road
2008 Prado Diesel: Quoted $9,500 for full engine replacement process after a bad engine threw a rod. The owner chose car wrecking — we paid $3,800.
2015 Commodore SV6: Owner ignored Check Engine light for 4 months. Turned out to be worn-out metallic bearings and a cracked block. Engine swap cost: $6,400.
1999 Ford Falcon: “Still goes — just slow.” Diagnosed with bent valves from a timing belt slip. Repair cost: $3,000+ just in labour time. We gave them $1,100 and hauled it the same day.
FAQ
Is replacing an engine cheaper than buying a new car?
Sometimes, yes — especially if your vehicle is under 10 years old. But older cars with engine trouble often cost more to fix than they’re worth.
Can I just swap in any engine that fits the bay?
Nope. Engine type, variant, mounts, and wiring harnesses all have to match. Otherwise, it’s a nightmare of misfires and dashboard lights.
Do mechanical breakdown insurance or warranties cover engines?
Only if you’ve got additional protection or extended cover, standard plans often exclude “wear and tear” or internal engine damage.
What about aftermarket engines? Are they safe?
Some are. But always check for acceptable quality standards and warranty. Don’t buy a no-brand block from Gumtree and expect it to last.
How long does the engine replacement process take?
Anywhere from 2–7 days depending on the repair shops, part availability, and complexity of the engine system.
