Overheating

Overheating on a used car · causes and what to check

Overheating is the fault most likely to turn a cheap car into a scrapped one. It is also one of the easiest to spot in ten minutes if you know where to look.

Quick answer

Overheating appears as a documented fault on 146 models in our library, across 166 separate faults. The most common areas involved are Cooling System, Cooling, Exhaust, Climate Control, Engine, Engine Cooling.

What it usually means

  • Temperature climbing in traffic but fine on the move · fan or thermostat.
  • Coolant disappearing with no visible leak · possible head gasket or internal loss.
  • Mayonnaise-coloured oil filler cap or sweet smell from the exhaust · head gasket territory.
  • Repeated top-ups mentioned in service history · treat as unresolved until proven.

How to check it on the forecourt

  1. 01Cold engine: open the expansion tank and check the level and the colour of the coolant.
  2. 02Sit in traffic or idle for ten minutes and watch the gauge and the cooling fan cutting in.
  3. 03Look for staining or crust around hoses, the water pump and the radiator corners.
  4. 04Squeeze the top hose when warm · rock hard usually means pressure where it should not be.

Models where this is documented

Each entry links to that model's full fault page, with onset mileage, severity and what to inspect.

Audi A32012–20252 matching faults
  • 1.4/1.5 TFSI water pump and thermostat leaks· 70,000+ miles
  • Lack of hot air from cabin vents (often passenger side first) due to a split silica bag blocking the heater matrix.· 50,000-80,000 miles
Audi A52016–20242 matching faults
  • DPF and AdBlue faults on 2.0 TDI models· 70,000+ miles
  • Coolant leak from the thermostat housing and water pump module on 2.0 TFSI (EA888) engines.· 40,000-70,000 miles
Audi A62014–20252 matching faults
  • DPF and AdBlue faults on 2.0 and 3.0 TDI· 80,000+ miles
  • Thermostat housing and water pump leaks on V6 engines· 50,000-80,000 miles
Audi Q52013–20172 matching faults
  • Water pump / thermostat module failure.· 80,000+ miles
  • Front LED Daytime Running Lights (DRLs) dimming, turning yellow, or failing completely due to the control module overheating and burning the light tube.· 60,000+ miles or 6-8 years
BMW 4 Series2014–20252 matching faults
  • EGR cooler recall and DPF blockage on diesels· 70,000+ miles
  • Coolant loss and overheating due to a failing expansion tank or water pump on B-series engines.· 40,000-70,000 miles
BMW 7 Series2015–20222 matching faults
  • Water pump and thermostat failures· 70,000+ miles
  • Blue smoke from the exhaust after extended idling, indicating valve stem seal failure on N63 engines.· 70,000-100,000 miles
BMW X22018–20252 matching faults
  • DPF issues on diesel models used in town· 60,000+ miles
  • Slow coolant loss and overheating risks on four-cylinder petrol (B48) models due to a brittle plastic coolant vent line or failing water pump.· 50,000-80,000 miles
Chevrolet Camaro2016–20232 matching faults
  • Cooling-system stress on tracked cars.· Varies
  • Slow cranking or failure to start when the engine is hot due to starter motor heat soak.· 40,000-70,000 miles
Cupra Leon2020–20262 matching faults
  • Touch slider and infotainment glitches, unresponsive climate controls· Age-related
  • Slow coolant loss and dried pink residue around the water pump and thermostat housing on 2.0 TSI models.· 40,000-60,000 miles
Jaguar XE2015–20242 matching faults
  • DPF blockage on short journey cars· 70,000+ miles
  • Coolant loss and overheating due to cracked plastic water pump or thermostat housings.· 40,000-70,000 miles
Nissan Altima2013–20182 matching faults
  • CVT overheating and failure — the defining Altima issue.· 60,000+ miles
  • Loud clicking or tapping noise from behind the glovebox when adjusting the cabin temperature.· 50,000-90,000 miles
Nissan Maxima2016–20232 matching faults
  • Engine temperature gauge creeping up whilst idling, or the air conditioning blowing warm air when stationary due to cooling fan motor failure.· 70,000-100,000 miles
  • Rhythmic clicking noise from behind the fascia or unequal temperature distribution between driver and passenger vents due to blend door actuator failure.· 60,000-90,000 miles
Nissan Pathfinder2013–20202 matching faults
  • CVT overheating, judder and failure.· 60,000+ miles
  • Loud grinding, clicking, or excessive vibration from the front end, potentially leading to overheating at idle due to cooling fan bearing failure.· 50,000-80,000 miles
Nissan Sentra2013–20192 matching faults
  • CVT overheating, whine and failure.· 60,000+ miles
  • The air conditioning blows warm when stationary, or the engine temperature gauge rises at idle due to cooling fan motor failure.· 60,000-90,000 miles
Peugeot Expert2016–20252 matching faults
  • DPF and AdBlue faults on delivery-cycle vans· 90,000+ miles
  • Slow loss of coolant and risk of overheating due to water pump failure on the 2.0 BlueHDi.· 60,000-100,000 miles
Renault Megane2016–20232 matching faults
  • DPF and AdBlue faults on 1.5 and 1.7 dCi engines· 70,000+ miles
  • Gradual coolant loss caused by a cracked or warped plastic thermostat housing.· 30,000-60,000 miles
Seat Arona2017–20252 matching faults
  • Water pump and thermostat housing leaks· 60,000+ miles
  • Jerky acceleration and hesitation in first gear on 1.5 TSI EVO models when cold.· From new (software related)
Seat Ateca2016–20252 matching faults
  • DPF and AdBlue faults on TDI models· 70,000+ miles
  • Loss of cabin heat on one or both sides. This occurs when the silica bag inside the coolant expansion tank splits, releasing silicates that circulate and permanently block the internal channels of the heater matrix.· 50,000-80,000 miles
Skoda Karoq2017–20252 matching faults
  • DPF and AdBlue issues on diesel versions· 70,000+ miles
  • Coolant loss and sweet smell from the engine bay due to a leaking thermostat housing or water pump.· 40,000-60,000 miles
Volkswagen Golf2015–20212 matching faults
  • 1.4T/1.8T water-pump/thermostat failure and carbon build-up.· 60,000+ miles
  • Blocked heater matrix and discoloured coolant due to ruptured silica bag in the expansion tank.· 50,000-80,000 miles
Alfa Romeo Stelvio2017–20251 matching fault
  • Coolant leaks from the radiator seams or lower hoses, leading to low coolant warnings and potential overheating.· 40,000-60,000 miles
Audi A12012–20251 matching fault
  • Slow coolant loss and a sweet smell from the engine bay due to a leaking thermostat housing and water pump module on EA211 petrol engines.· 40,000-70,000 miles
Audi A42009–20161 matching fault
  • Water pump and thermostat (plastic) failure.· 70,000+ miles
Audi Q22016–20251 matching fault
  • Slow loss of coolant and a sweet smell from the engine bay, caused by a leaking thermostat housing/water pump module on TFSI engines.· 50,000-70,000 miles
Audi Q32012–20251 matching fault
  • Slow coolant loss and a sweet smell under the bonnet on 1.4 and 1.5 TFSI models.· 40,000-70,000 miles
Audi Q4 e-tron2021–20251 matching fault
  • Failure to produce hot or cold air due to faulty pressure sensors or valve blocks, specifically on models equipped with the optional heat pump.· 20,000-40,000 miles
Audi TT2014–20231 matching fault
  • Slow loss of coolant and a sweet smell from the engine bay when up to temperature.· 40,000-60,000 miles
BMW 1 Series2011–20241 matching fault
  • Electric water pump and thermostat failure· 80,000+ miles
BMW 3 Series2012–20181 matching fault
  • Electric water pump and thermostat failure.· 70,000+ miles
BMW 5 Series2011–20161 matching fault
  • Electric water pump / thermostat failure.· 80,000+ miles
BMW i42021–20251 matching fault
  • Lack of cabin heating or cooling due to heat pump changeover valve failure.· 20,000-40,000 miles
BMW X12012–20241 matching fault
  • Water pump and thermostat failure· 80,000+ miles
BMW X32011–20171 matching fault
  • Electric water pump failure.· 80,000+ miles
BMW X62014–20191 matching fault
  • Water pump and thermostat housing failures· 60,000+ miles
BMW Z42009–20161 matching fault
  • Water pump and thermostat failures on N20 and N54 engines· 60,000+ miles
Buick Encore2013–20221 matching fault
  • Water-pump and thermostat failures.· 70,000+ miles
Cadillac XT52017–20231 matching fault
  • Thermostat failure causing the engine to run cold, poor heater performance, and EML illumination (code P0128).· 40,000-70,000 miles
Chevrolet Bolt EV2017–20231 matching fault
  • Cabin heater blows cold air despite the temperature being set to maximum, caused by a failed electric heater control module.· 40,000-80,000 miles
Chevrolet Cruze2011–20191 matching fault
  • 1.4T coolant leaks (thermostat housing, water outlet, hoses) and overheating.· 60,000+ miles
Chevrolet Traverse2018–20231 matching fault
  • AC condenser and blend-door faults.· 70,000+ miles

Showing the 40 models with the most documented matches · browse the full library.

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