Hyundai Tucson Thermostats
Thermostats to suit the Hyundai Tucson, cross-referenced against OEM specification and dispatched countrywide
What Are Hyundai Tucson Thermostats?
The thermostat holds coolant in the block until the engine is up to temperature, then opens and lets it circulate through the radiator. The practical Hyundai question is whether yours is a standalone insert or part of a housing assembly — on several of the newer engines it is the latter, which means the part you actually need is considerably bigger than the one you pictured, and it usually arrives with the sensor already fitted. Symptoms point in a useful direction too: a thermostat stuck open gives you cold running, poor economy and a heater that never gets there, which is the failure we see most. Stuck closed is rarer and far more expensive, because it takes the head gasket with it.
Signs You Need New Thermostats
Tucson Thermostats: what actually decides fitment
What changes across the range
On the Tucson, JM, LM, TL and NX4 are all in circulation locally, and they do not share one parts list.
The LM Tucson and the ix35 are the same vehicle sold under two names in different markets, so ix35 stock is a legitimate source for LM-generation parts and vice versa.
Worth knowing: the Tucsonruns in lockstep with the Kia Sportage — JM with KM, LM with SL, TL with QL, NX4 with NQ5.
What we check on thermostats
- •The generation code, because Tucson parts lists split on it
- •The engine family — this Tucson was sold with Beta II 2.0 (JM), Theta II 2.0 (LM), Gamma 1.6 T-GDi (TL), Nu 2.0 and R-line 2.0 CRDi (TL)
- •Petrol or diesel, and whether the car has air conditioning
- •Whether the car is pre- or post-facelift within its generation
In South Africa the Tucson is mostly the family SUV that does school runs during the week and gravel-road holiday mileage over December, a duty cycle that is hard on suspension and cooling components. That is the wear pattern we stock and source against.
Hyundai Tucson Thermostats — Questions We Get Asked
Will thermostats from another Tucson fit mine?
Not automatically. The Tucson sold in South Africa as JM, LM, TL and NX4, and the LM Tucson and the ix35 are the same vehicle sold under two names in different markets, so ix35 stock is a legitimate source for LM-generation parts and vice versa. Send us the generation code off your VIN plate and we will confirm it either way before anything is dispatched.
Which engines did the South African Tucson come with?
SA-market cars ran Beta II 2.0 (JM), Theta II 2.0 (LM), Gamma 1.6 T-GDi (TL), Nu 2.0, R-line 2.0 CRDi (TL). The code stamped on the block is what we work from — the badge on the boot is not reliable on its own.
Is my thermostat a standalone part or a whole housing?
On several of the newer Hyundai engines it is part of a housing assembly rather than an insert, which means the part you need is considerably larger than the one you pictured and usually arrives with the sensor already fitted. Send the engine code and we will tell you which of the two you are buying before you commit.
What does a stuck thermostat do on a Hyundai?
Stuck open is the common one: the engine runs cold, the heater never really warms up, the gauge sits below the middle and economy drops. Stuck closed is rarer and far more serious — the gauge climbs fast, coolant bubbles in the header tank, and the head gasket is what pays for it.
What does a Hyundai thermostat cost in South Africa?
Our supplier network stocks Hyundai thermostats from around R149 to R4,500 depending on model and whether it is a bare thermostat or a full housing assembly — which is exactly why the engine code matters more than the model name here. Request a free quote with the code for the correct part and a fitting estimate.
How long does the job take?
About an hour on most of the naturally aspirated engines. The turbocharged units are tighter to get at and take longer. Have a coolant flush and refill done at the same time; the system is already drained, so it costs very little extra to do it properly.
My Hyundai never reaches operating temperature. What is it?
A thermostat stuck open, nine times out of ten. The less common cause is a coolant temperature sensor reporting cold to the gauge while the engine is actually up to temperature. A workshop scan reads live coolant temp in seconds and tells you which of the two you are chasing, which is cheaper than replacing both.
Learn More About Hyundai Tucson Thermostats
Not sure which thermostats fits your Tucson?
Send us your VIN or the engine code off the block and our Hyundai desk will cross-check the correct thermostats for your exact Tucson derivative.