Brand New G4NB 1.8L Petrol Long Engine for Hyundai i30 GD 2012-2017

About this engine

Between 2012 and 2017 the Hyundai i30 GD was everywhere: driveways, fleet car parks, driving-school signage. It earned that spread by being a genuinely durable small car, and most examples still have plenty to give, provided the engine holds up. Petrol i30 GD models factory-fitted with the G4NB run a 1.8L four-cylinder from Hyundai’s Nu engine family, and this listing exists for the day that engine calls time.

It is a brand-new G4NB 1.8L petrol long engine for the Hyundai i30 GD 2012-2017, built to OEM fitment specification, strengthened internally where the original design had known weaknesses, and hot and cold tested after assembly. No reconditioned core, no unknown history.

Every engine carries a 12-month or 50,000 km parts warranty, ships freight-free anywhere in Australia, and is matched to your car through a VIN check before purchase. Have your VIN handy and call 1300 200 320.

Inside the G4NB: how it works and where it wears

The G4NB sits in Hyundai's Nu engine family as the 1.8-litre petrol four-cylinder, positioned between the smaller Gamma engines and the 2.0-litre Nu variants, the MPI G4NA and GDI G4NC. In the i30 GD it was the volume petrol engine for Australian buyers, tuned for flexible everyday performance rather than outright pace.

Its fuel system is multi-point injection, with injectors feeding the intake ports. That matters for long-term ownership: because fuel flows over the intake valves continuously, the G4NB largely sidesteps the intake-valve carbon accumulation that direct-injection designs are known to develop with age. Valve timing is managed by dual continuously variable valve timing, and the camshafts are driven by a timing chain, so no belt change ever appears on the service schedule.

What ends a G4NB's life is usually distance and circumstance rather than a design flaw: a decade of stop-start commuting, an overheat from a burst hose or failed thermostat, oil starvation after a missed service, or simply the compounding wear of a couple of hundred thousand kilometres. The symptoms are familiar to any workshop: fading compression, oil consumption, rattles that grow with load.

When those symptoms arrive in an i30 GD that is otherwise straight, rust-free and comfortable, replacing the engine with a new one is often the cheapest way anywhere in the market to secure years of further motoring. The engines we supply keep OEM fitment while carrying upgraded connecting rods, crankshaft, bearings and other internals, so the known wear areas of the design start from a stronger baseline than the original did.

Keeping an i30 GD on the road: fitment first

The i30 GD generation ran locally from 2012 to 2017, and the range was not single-engined: petrol and diesel options existed across the years and trim levels. So before this or any engine is ordered, the vehicle itself has to be identified beyond doubt, and the VIN is how that is done.

This long engine suits i30 GD vehicles built between 2012 and 2017 that were originally fitted with the G4NB 1.8L petrol engine. Supply us the 17-character VIN, readable on the build plate, at the driver's side base of the windscreen, or on your registration certificate, and we will confirm your car's factory engine before you commit. The check is free, happens before payment, and if it turns out your i30 carries a different engine, we will point you to the right product rather than sell you the wrong one.

Confirm the mechanical diagnosis with the same rigour. A compression test and leak-down test cost little and distinguish a worn engine from a noisy accessory, a tired mount or an ignition fault. Genuine indicators for replacement include low or uneven compression, steady oil loss without external leaks, and bottom-end noise under acceleration.

With the VIN matched and the diagnosis confirmed, your workshop can lock in a labour quote immediately, because the job is fully predictable: the new engine accepts every bolt-on component from the old one, in the positions Hyundai designed for them.

Buying, freight and installation for the GD

Here is precisely what changes hands. You receive a long engine, meaning the assembled block with crankshaft, pistons and connecting rods plus the complete cylinder head, crated and secured. You do not receive manifolds, injectors, the fuel rail, alternator, starter, air-conditioning compressor or external sensors, because your existing components transfer across during installation. That split is deliberate: you buy the parts that wear out, and keep the parts that last.

Behind the product stands the build process. Each G4NB is built to OEM fitment specification with internals upgraded above the original grade, then hot and cold tested after assembly, verifying compression, oil pressure and sealing with the engine at real operating temperature. A heat tab is fitted before the engine is crated; it permanently indicates any overheat event, and because overheating is excluded from warranty cover, the cooling system in your i30 should be inspected and bled properly as part of the fit.

The parts warranty runs 12 months or 50,000 km, whichever comes first, and requires installation by a qualified mechanic. Freight is free to any address in Australia, with delivery direct to your workshop available and recommended.

The full sequence, from first call to first drive: VIN check on 1300 200 320, confirmation, order, dispatch, installation, early first service. For a car as easy to live with as the i30 GD, it is a short road back to daily duty.