Injectors Kia: problems by model and engine

Documented faults, from most to least important

Severity × frequency. Below each one, the Kia models it appears in.

- High severityFrequency: Occasional1.6 CRDiFuel pressure regulator and injectors sensitive to diesel qualityThe common-rail pressure regulator can seize and bleed off too much fuel, which makes starting difficult; the system works at a high pressure (around 1,600 bar) that makes it sensitive to poor-quality diesel, and the injectors need individual coding if they are replaced.
In Carens III, Ceed I, Ceed II, Ceed III, Soul I and Soul II and 4 more models
- High severityFrequency: Occasional1.7 CRDiInjectors that lose calibration with mileageThe 1.7 CRDi's common rail injectors can lose their factory calibration with mileage or because of poor-quality diesel, causing vibration at idle and black smoke from the exhaust; the unburned fuel that ends up diluting the oil also means oil change intervals need to be shortened.Repair (garage): €80–€350
In Carens IV, Optima III, Optima IV, Sportage III and Sportage IV
- High severityFrequency: Occasional2.5 CRDi (D4CB)Injectors: clamp bolts (2008 recall) and faulty sealsIn 2008 Kia Germany recalled about 8,200 Sorento 2.5 CRDi because the injector clamp bolts could loosen or break (incorrect factory tightening torque). Auto Bild adds that faulty injector seals can coke the oil and damage the turbo and engine.
In Sorento I
- Medium severityFrequency: Occasional1.0 T-GDICarbon build-up on the intake valves and coking of the injectorsThe direct injection on the 1.0 T-GDI does not wash the intake valves with fuel, so over the kilometres carbon builds up on them and on the injectors. It causes loss of power, jerking and higher fuel consumption; it is fixed by cleaning the manifold and valves, without damaging the engine.
In Ceed III, Picanto III, ProCeed, Rio IV, Stonic and XCeed
- Medium severityFrequency: Occasional2.0 CRDi (D4EA)Carbon build-up in the common-rail injectors with town drivingThe common-rail injectors of the 2.0 CRDi D4EA can build up carbon with town driving and short journeys, making cold starting harder; it is documented for the Hyundai Tucson I and it is reasonable to expect it in the other cars with this engine.
In Carens II, Carens III, Cerato I, Magentis II and Sportage II
- Medium severityFrequency: Occasional1.1 and 1.4 CRDiCarbon build-up on the common-rail injectorsThe common-rail injectors on the 1.1 and 1.4 CRDi accumulate carbon deposits with urban use and short trips, which can make cold starting harder and cause jerking; German buying guides cite it as typical wear, not as a design fault specific to the engine.
In Ceed II, Picanto I, Rio III, Rio IV and Venga
- Medium severityFrequency: Occasional1.8 / 2.0 NuCarbon build-up in the intake and injectors of the 2.0 GDIThe German guides for the i40 and ix35 warn that the direct-injection 2.0 GDI builds up deposits: Gebrauchtwagenberater says carbon in the intake and coked injectors should be expected, and recommends cleaning additives and some premium petrol. A parts portal links it to the Nu GDI.
In Carens IV, Cerato III, Sportage III and Sportage IV
- Low severityFrequency: OccasionalV6 Delta 2.5 and 2.7 (Hyundai-Kia)Unstable idle from a dirty throttle body, idle valve or injectorsThe 2.7 V6 can idle unevenly when the throttle body, the idle control valve or the injectors get dirty. Kiazone adds that dirty injectors increase consumption and reduce power. The sources fix it by cleaning or replacing those parts.
In Carnival II, Magentis II and Sportage II

By Kia model

Open yours to see only the faults that affect it, by engine and by year.

Engines and gearboxes involved

Parts for your Kia for faults with the injectors

Add the model and engine in the shop, or better still the registration plate or VIN, to see only the parts that fit.

Injector
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Frequently asked questions

What faults with the injectors do Kia cars have?

In 27 models from Kia there are 8 documented faults with the injectors. The most important: fuel pressure regulator and injectors sensitive to diesel quality, injectors that lose calibration with mileage and injectors: clamp bolts (2008 recall) and faulty seals. Each fault has its own page with the affected years and versions, the symptoms and the repair cost.

Which Kia models have the most problems with the injectors?

Kia Sportage IV (3 faults), Kia Sportage II (2 faults), Kia Magentis II (2 faults) and Kia Carens III (2 faults).

Which Kia engines have faults with the injectors?

1.0 T-GDI (1 fault), 1.1 and 1.4 CRDi (1 fault), 1.6 CRDi (1 fault), 1.7 CRDi (1 fault) and 1.8 / 2.0 Nu (1 fault).