Hyundai H-1 TQ
Weaknesses, engine ratings and buying advice
Generations
Engine Overview
The Hyundai H-1 TQ is available with one engine variant at 116 hp.
Workhorse diesel built for commercial duty. Stacks of torque, long-lived if maintained, but injector bills can sting.
- !! Injector leakage causing oil contamination from 120,000 km
Leaking injectors allow carbon to enter the crankcase. Sooty deposits block the oil pick-up strainer in the sump. Result: turbocharger and engine damage from oil starvation.
Symptoms: White/blue smoke, poor cold start, rising oil level due to fuel contamination, engine knocking. - !! Turbocharger failure from oil contamination from 130,000 km
Oil contaminated by injector leakage clogs the turbocharger oil supply. The turbo seizes without clean lubrication, often simultaneously with engine lubrication problems.
Symptoms: Whistling or rattling from turbocharger, severe power loss, black smoke, engine oil on compressor wheel. - !! Injector copper washers allow oil sump to coke up from 120,000 km
Leaking injector copper washers allow combustion gases into the oil. The resulting residues clog the oil strainer and block turbo oil supply — the most common cause of engine failure in the H-1.
Symptoms: Blue smoke, rising oil viscosity, turbo noise, dropping oil pressure, check engine light.
+ 3 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Sills and underbody rust through from around 6 years The H-1 TQ rusts through at sills, wheel arches, and underbody components. After 6 years, sills can be completely rusted through from wheel arch to wheel arch. Repair costs up to approximately €1,400. Symptoms: Visible rust on sill, holes in sill, rust under trim parts from 100,000 km | Medium | |
| Tailgate and rear body parts corrode The tailgate and rear body parts of the H-1 TQ show early corrosion, especially at folds and bolted connections. Typical for vehicles without regular preservation. Symptoms: Rust on tailgate, rust visible at folds and sheet metal edges at the rear from 100,000 km | Medium | |
| Rust at sheet metal overlaps and wheel arches From around 6 years old, the H-1 TQ shows rust at sheet metal overlaps, door frames, wheel arches, and frame parts. Bolt heads rust and can channel water into cavities. Underbody treatment is therefore important. Symptoms: Rust bubbles on door bottom edges, rust under wheel arches and on frame parts, rust spots on bolt heads from 120,000 km | Medium |
Alternatives
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Known Problems and Issues +
A total of 15 weaknesses have been documented for the Hyundai H-1 TQ (2008–2026) — 6 engine-related and 9 vehicle-related. One problem engine: D4CB (2.5L CRDi). Typical issues affect Rust, Other, Gearbox, Body.
H-1 (D4CB, 2008–2018) — Stay Away!: Injector leakage causing oil contamination, Turbocharger failure from oil contamination, Injector copper washers allow oil sump to coke up. Power: 136 PS.
H-1 (D4CB, 2008–2018) — Stay Away!: Injector leakage causing oil contamination, Turbocharger failure from oil contamination, Injector copper washers allow oil sump to coke up. Power: 170 PS.
H-1 (D4CB, 2008–2018) — Stay Away!: Injector leakage causing oil contamination, Turbocharger failure from oil contamination, Injector copper washers allow oil sump to coke up. Power: 116 PS.
H-1 (D4CB, 2008–2018) — Stay Away!: Injector leakage causing oil contamination, Turbocharger failure from oil contamination, Injector copper washers allow oil sump to coke up. Power: 163 PS.
H-1 (D4CB, 2018–2026) — Stay Away!: Injector leakage causing oil contamination, Turbocharger failure from oil contamination, Injector copper washers allow oil sump to coke up. Power: 175 PS.
What to watch out for with the Hyundai H-1? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
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Last updated: February 2026 · All information without guarantee