Brand New G4NH 2.0L Petrol Engine for Kia Forte / Cerato 2018-2024

About this engine

If the G4NH engine in your Kia Cerato or Kia Forte has failed, you are facing an awkward decision: pour money into a worn engine, or fit a brand-new one and keep a car you already know inside out. This page is about the second option. Engine Zone supplies a brand-new G4NH 2.0L petrol engine suitable for Cerato and Forte models built between 2018 and 2024.

Each engine is built to OEM fitment specification, upgraded internally for added durability, and hot and cold tested before dispatch. Freight is free anywhere in Australia, and the engine is covered by a 12-month or 50,000 km parts warranty, whichever comes first. Before anything is loaded onto a truck, we run your VIN to confirm the engine matches your exact vehicle. Prefer to talk it through? Call 1300 200 320 and we will check compatibility while you are on the phone.

Common reasons a G4NH engine gets replaced

A Cerato or Forte from this generation is usually still a tidy car when the engine gives up. The paint, interior and electronics have years left in them, which is exactly why a dead engine feels so unfair. The choice generally comes down to three paths: rebuild the original, gamble on a second-hand engine, or fit a brand-new replacement.

Rebuilding sounds cheaper until the machine shop opens the block. Once there is crank or bore damage, the bill for machining, parts and labour can climb toward the cost of a new engine, and you still end up with second-hand components around a repaired core. A used engine from a wrecker carries the opposite problem: nobody can tell you how it was serviced, how hard it was driven, or how long it will last.

The failures that bring owners here follow familiar patterns. Overheating after a coolant leak can distort the head or damage bearings. Missed oil changes accelerate wear in any modern petrol engine. And sometimes an engine simply fails internally without much warning at all. Whatever the cause, once the bottom end is compromised, replacement is normally the cleaner and more predictable route.

A brand-new engine resets the clock to zero kilometres. There is no unknown history, no inherited wear, and no guesswork about what a previous owner did or did not do. For a car you plan to keep for years, that certainty is usually worth more than the saving on a roll of the dice.

A zero-kilometre Smartstream G4NH, hot and cold tested

The G4NH is a 2.0-litre four-cylinder petrol engine from Hyundai and Kia's Smartstream engine line, fitted to the Cerato and Forte ranges sold between 2018 and 2024. It uses a timing chain rather than a belt, so there is no scheduled belt replacement to factor into ownership costs.

The replacement engine listed here is brand new, not reconditioned. It is built to OEM fitment specification, so it mounts and connects exactly as the factory engine did, yet it is not a straight copy. Rather than copy the factory specification exactly, the internals are upgraded: higher-grade connecting rods, crankshaft, bearings and other internal parts go in from the start. Every engine then goes through hot and cold testing, which verifies compression, oil pressure and general running behaviour before the unit is signed off for sale.

Each engine is also fitted with a heat tab, a small indicator that shows whether the engine has been subjected to overheating after it leaves us. It is worth knowing up front that overheating damage is not covered by the warranty, so getting the cooling system right during installation matters. More on that below.

Compatibility is confirmed before purchase, not after delivery. Hyundai and Kia made running changes across these model years, so two cars that look identical can carry different engine variants. Send us your VIN and we will confirm the correct engine for your specific build before anything is dispatched. If the engine on this page is not the right one for your car, we will tell you so rather than ship it. Because the check happens before dispatch, your mechanic is never left sorting out a mismatch on the hoist. That single step removes most of the risk from buying an engine online, and it costs you nothing beyond a phone call or an email.

What's in the crate, and how it gets to you

This product is a long engine: the assembled block, cylinder head and all internal components, built up and tested as one unit. Manifolds, injectors, the throttle body, sensors, pumps and external accessories are not included; those parts transfer across from your existing engine during installation. For most workshops this is the preferred format, because it keeps the price down and lets the fitter reuse externals that are already proven on your car.

Freight is free Australia-wide. The engine travels secured to a pallet, so it can be delivered to your mechanic, a workshop of your choice, or any address able to receive palletised freight.

Installation must be carried out by a qualified mechanic. That is both a warranty condition and plain good sense on a modern engine. During the fit-out, it pays to renew the basics: fresh oil and filter, new coolant, and a proper flush of the cooling system, particularly if overheating killed the original engine. A tired radiator or sticking thermostat can take out a new engine just as easily as an old one.

The warranty covers parts for 12 months or 50,000 km, whichever arrives first, provided the engine was professionally installed and has not been overheated, which the heat tab will show. Keep the installation invoice and service records with the car.

If anything on this page raises a question, phone 1300 200 320. We would rather spend ten minutes confirming details than have the wrong engine turn up at your workshop.