Hyundai Tucson & ix35 Replacement Engine Guide: JM, LM and TL Engines Explained
Hyundai’s mid-size SUV has worn two names in Australia – Tucson, then ix35, then Tucson again – and across those three generations it has used at least eight different engines. If yours has failed, the badge on the tailgate tells you almost nothing about which engine you need. This guide goes generation by generation, lists each engine’s known weak points, and links the brand new replacement we supply for it.
Tucson JM (2004-2010)
2.0 G4GC petrol: a port-injected Beta II with a timing belt. Robust and simple, and most failures on JMs are age-related – a snapped belt, a cracked head from a cooling fault, or worn rings on very high kilometres. Brand new: G4GC 2.0 engine for Tucson JM 2004-2010.
2.7 V6 (G6BA) and 2.0 CRDi (D4EA): less common in Australia. Call us with the VIN and we will advise.
ix35 LM (2010-2015)
This is the generation that generates the most engine enquiries, and the one with the widest engine spread.
2.0 G4KD petrol (2010-2013): an early Theta II MPI. Generally reliable, with some oil consumption on high-kilometre examples.
2.4 G4KE petrol (2010-2015): the port-injected 2.4 Theta II. Known for connecting-rod bearing wear that starts as a tick and becomes a knock; by the time it knocks the crank is usually scored and a replacement engine is the practical answer. Brand new: G4KE 2.4 MPI long engine for ix35 LM 2010-2015.
2.4 G4KJ GDI petrol (later LM): the direct-injection 2.4. Same bearing watch, plus GDI carbon build-up and a hard-working high-pressure fuel pump. Brand new: G4KJ 2.4 long engine for ix35 2010-2015.
2.0 G4NC GDI petrol (2013-2015): the Nu direct-injection 2.0 that replaced the G4KD in the facelift. Oil consumption is the thing to watch. Brand new: G4NC 2.0 GDI long engine for ix35 LM 2013-2015.
2.0 CRDi D4HA diesel (2010-2015): the R-series turbo diesel. Timing chain stretch, VGT turbo wear, injector wear and DPF trouble are the recurring themes, and we covered them in detail in our D4HA and D4HB R-series diesel problems guide. Brand new: D4HA 2.0 CRDi turbo diesel engine for ix35 2010-2015.
Two things trip people up on the LM. First, the 2.0 and 2.4 petrols were sold side by side, so “ix35 2.0 petrol” could be a G4KD or a G4NC depending on build date. Second, GDI and MPI engines of the same capacity are not interchangeable. Confirm the engine code from the block before ordering – our guide to finding the engine number shows where it is.
Tucson TL (2015-2021)
2.0 G4NA MPI petrol (Active, 2015-2017): the port-injected Nu 2.0 fitted to the entry-level TL. Simple and well regarded, with oil consumption the only common complaint. Brand new: G4NA 2.0 engine for Tucson 2015-2017.
2.0 G4NC GDI petrol (Active X, Elite): the direct-injection Nu. Same as above with GDI carbon added. Brand new: G4NC 2.0 GDI long engine for Tucson TL 2015-2021.
1.6 T-GDI G4FJ petrol (Elite, Highlander, 2015-2020): the turbocharged Gamma paired with the dual-clutch gearbox. Quick and refined when serviced; turbo bearing wear, carbon and, on neglected cars, piston damage when not. Brand new: G4FJ 1.6 turbo long engine for Tucson TL.
2.0 CRDi D4HA diesel: carried over from the ix35 with revised emissions hardware. See the diesel guide linked above.
Which engine problems mean replacement?
Carbon build-up, a worn fuel pump, a leaking cam cover and a rattling timing chain are all repairs. The situations that usually tip into replacement are:
- Bearing knock on a Theta II petrol (G4KD, G4KE, G4KJ) – the crank and galleries are contaminated once it knocks.
- Low-oil damage on a Nu engine (G4NA, G4NC) that has been driven with the level off the dipstick.
- A skipped timing chain on the D4HA diesel, which bends valves and often damages pistons.
- Overheating severe enough to warp the head and score the bores.
Our guides on when to replace an engine and the replacement vs repair checklist help you decide. If the car is a late TL with plenty of life left, a brand new engine makes the most sense; on an early JM a reconditioned or used engine may suit the car’s value better, and we lay that out honestly in new vs reconditioned engines in Australia.
What comes with a brand new Tucson or ix35 engine
- Brand new OEM-spec long engine – never used, never repaired
- Hot and cold tested before dispatch, with a heat tab fitted
- Fitment confirmed against your VIN – see how to verify engine fitment
- Free freight anywhere in Australia, delivered to your workshop
- 12-month or 50,000 km parts warranty
Fitting notes for workshops
On the petrol engines, transfer the intake, injectors and sensors carefully and replace the PCV valve as a matter of course. On the D4HA, replace the turbo oil feed line and check the intercooler for oil before the new engine goes in. Whatever the engine, the cause of the original failure must be addressed – a blocked oil cooler, a failed thermostat, a leaking injector – or the replacement inherits it. Our guides on common installation errors and running in a new engine cover the rest.
Frequently Asked Questions
Is the ix35 the same as the Tucson?
The ix35 LM is the second-generation Tucson, sold under the ix35 name in Australia from 2010 to 2015. The TL that replaced it went back to the Tucson name. Parts and engines are generation-specific, not name-specific.
Which ix35 engine is best?
The 2.0 CRDi diesel is the strongest performer and, serviced on time, very long-lived. Among the petrols, the G4NC 2.0 GDI has the fewest catastrophic failure modes; the 2.4 Theta II engines need their oil watched and any tick investigated early.
Can I fit a 2.4 into an ix35 that had a 2.0?
Not as a simple swap. Mounts, wiring, ECU calibration and registration all change. Replace with the same engine code – our how to match engine code guide explains why.
How much does a new Tucson engine cost?
Prices are on each product page, with the 2.0 petrols at the lower end and the diesel at the top. Freight is free. Call 1300 200 320 with your VIN and engine code, or browse the Hyundai engines and diesel engines ranges.
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