Toyota HiLux Buying Guide: Generations, Known Issues and What to Check Before You Buy Used in Australia

If you’re shopping for a used Toyota HiLux, the question that matters most isn’t “is Toyota reliable?” It’s “which generation, and which engine, am I actually looking at?” The HiLux has been rebuilt several times since the mid-2000s, and each generation carries its own well-documented mechanical quirks. Buying without knowing which one you’re looking at is how people end up with an unexpected repair bill in the first six months.

This guide breaks the HiLux down by generation and engine code, covers the issues worth asking about before you hand over a deposit, and explains what actually drives pricing on the used market.

The Short Answer

A well-maintained HiLux from any generation can be a smart, durable buy, but “well-maintained” is doing a lot of work in that sentence. The KUN26 (2005–2015, 1KD-FTV/2KD engines) is a common lower-cost entry point, but early 1KD-FTV models have a documented injector-seal issue worth checking. The eighth-generation HiLux arrived in 2015 with the 1GD-FTV and 2GD-FTV engines, and a further update followed in 2020. Timing-chain rattle has been reported on some 1GD-FTV vehicles, particularly earlier examples. Later models generally command a higher asking price, but condition and service history remain more important than simply choosing the newest generation; a well-documented 200,000km truck often beats a neglected 80,000km one.

Toyota HiLux Generations at a Glance

KUN26 (2005–2015): The Budget Entry Point

This is the generation most likely to show up under $20,000 today, and it’s the one with the longest track record, which cuts both ways. Early 1KD-FTV 3.0L engines, particularly earlier production examples, had a documented injector-seat issue: the original copper injector seats could deteriorate and allow combustion gases into the engine oil, contributing to oil contamination and sludge that could restrict the oil pickup. Toyota addressed this in later production, but any pre-2009 KUN26 is worth asking a specialist about; specifically ask whether the injector seals have ever been replaced, and if not, budget for a specialist inspection before you buy.

Beyond that specific issue, KUN26 owners commonly report EGR valve carbon buildup (causing sluggish performance, usually fixed with a clean or replacement) and transfer case oil seal weeps that are often mistaken for gearbox or diff leaks. Neither is a dealbreaker, but both are worth factoring into your offer if they haven’t been addressed.

8th Generation, GUN122/GUN126 (2015–2020): Strong Truck, One Known Weak Point

This generation introduced the 1GD-FTV 2.8L and 2GD-FTV 2.4L engines and, for the most part, is a genuine step up in refinement. The issue to know about is timing chain rattle, reported most often on early 2015–2017 builds. It presents as a rattling or “marbles in a tin” noise on cold start that fades as the engine warms; that specific symptom is the single most reliable early warning sign. If you’re looking at an early 1GD-FTV vehicle, ask whether the chain has ever rattled or required repair, and listen carefully to a cold start yourself before you commit.

Later production is widely reported as having resolved most of this, though isolated cases still surface. If in doubt, a cold start with the bonnet up and no radio on is the cheapest diagnostic tool you have.

8th Generation Facelift (2020–present)

The most recent update to the platform brings further mechanical and feature changes and generally commands a higher asking price. As with any generation, long-term condition and service history remain the most important factors when assessing an individual vehicle.

What to Check Before You Buy, Regardless of Generation

• Full service history, especially oil changes. Diesel HiLux engines are unforgiving of extended service intervals. Ask for the logbook and look for consistency, not just stamps.
• Cold start behaviour. Listen for chain rattle (8th gen models) or rough idle and smoke (any generation) before the engine warms up; problems are often most obvious in the first 10–15 seconds.
• EGR and DPF health. Ask whether the vehicle has done much short-trip, low-speed driving. Diesel particulate filters need regular highway running to regenerate properly; a HiLux that’s spent its life doing short school-run distances is more likely to have EGR carbon buildup or DPF issues than one with genuine highway kilometres.
• Fault codes. A basic OBD-II scan before you buy can flag EGR flow or DPF efficiency codes that a test drive alone won’t reveal.
• Towing and work history. Ask directly what the vehicle was used for. A tradie’s ute that’s towed heavy trailers daily has a harder life than a weekend tow vehicle, even at similar kilometres.
• PPSR check. As with any used vehicle purchase in Australia, run a PPSR search using the VIN before you pay, to confirm there’s no money owing and no write-off or stolen-vehicle history.
• Underbody inspection. Look for oil weeping around the transfer case and crank seal, and check the chassis for rust or impact damage if the truck has clearly seen off-road use.

HiLux vs Ford Ranger: A Quick Note

The HiLux and Ranger are Australia’s two best-selling utes and constantly cross-shopped. Broadly: the HiLux has a longer reputation for mechanical simplicity and resale value, while the Ranger (particularly the current generation) tends to offer more towing capacity and cabin technology. Neither is a wrong answer; the right one depends on whether you value proven longevity or newer tech and payload. If you’re actively comparing generations of the Ranger itself, our Ford Ranger generation guide breaks down the PX through Next-Gen models the same way this guide breaks down the HiLux.

Why Used HiLux Prices Stay Firm

Toyota’s reputation for reliability translates into strong resale value, a pattern that holds nationally, where used Toyota models consistently command firm prices relative to many competitors. For the HiLux specifically, that’s compounded by high demand from tradies and fleets who need a dependable daily work vehicle, plus relatively limited late-model supply compared to demand. Don’t expect a “cheap because it’s old” HiLux; expect to pay for the badge, and use that expectation to justify spending on a proper pre-purchase inspection rather than skipping it to save money.

Find a Used Toyota HiLux Near You

HiLux listings move quickly in every major market. Browse current used Toyota stock on MarketTram in Sydney, Melbourne, Brisbane, or Perth.

FAQs

Which Toyota HiLux generation is the most reliable to buy used?
The 8th generation facelift (2020–present) has the fewest reported issues, but the earlier 8th generation (2015–2020) is a strong, more affordable option once you’ve confirmed the timing chain has been checked or hasn’t shown any rattle.

What is the injector seal issue on the KUN26 HiLux?
Pre-2009 KUN26 models with the 1KD-FTV engine used copper injector seals that could deteriorate and allow combustion gases into the engine oil, contributing to sludge buildup. It’s a known, well-documented issue worth asking a specialist about before buying an early KUN26.

How do I know if a HiLux has timing chain rattle?
Listen for a rattling or “marbles in a tin” noise on cold start that fades once the engine warms up. This has been reported most often on early 2015–2017 models with the 1GD-FTV engine.

Is a high-kilometre HiLux still worth buying?
Often, yes. Diesel HiLux engines are known for covering very high distances, provided they’ve had consistent servicing. A well-maintained high-kilometre truck can be a safer buy than a neglected low-kilometre one.

Should I get a pre-purchase inspection on a used HiLux?
Yes, especially for diesel models with unclear service history. An inspection that includes an OBD-II scan and a cold-start check can catch EGR, DPF, and timing chain issues before they become your problem.

What should I check before buying a used HiLux privately?
Beyond the mechanical checks above, always run a PPSR search using the VIN to confirm there’s no finance owing and no write-off or stolen-vehicle record before you pay.