Opel Combo
Robust naturally aspirated Ecotec four-cylinder with timing belt drive. The map-controlled thermostat is a known weak point across the entire Z1xXER family. Ignition coils and oil pressure switch are inexpensive service parts that should be replaced preventively.
Combo base
64 kW in the Combo C – adequate for daily use as a compact MPV.
Engine Weaknesses 5
The Z16XER is an interference engine with timing belt drive. Replacement interval 10 years or 150,000 km. If the belt breaks without being replaced, the valve train strikes the pistons — total engine failure.
Symptoms: No direct warning before failure. Indirect sign: belt rattling or squealing. Sudden engine failure with valve damage as a result.
The electronically controlled thermostat fails frequently, remaining permanently in the open or closed position. Only OEM parts provide reliable replacement.
Symptoms: Engine temperature permanently too low (around 73 °C instead of 91–96 °C), heater barely produces warmth, increased fuel consumption, fault code P2182.
The oil pressure switch is prone to leaking. Escaped oil can migrate along the wiring loom to the engine ECU and damage it.
Symptoms: Oil spots in engine bay below the oil pressure switch, oil pressure warning light, in the worst case ECU failure from oil contact at the connector.
Ignition coils fail regularly and cause misfires. Replacement is straightforward and inexpensive but should be done promptly to protect the catalytic converter from damage.
Symptoms: Juddering when accelerating, misfires especially at higher revs, engine warning light, rough idle.
The membrane in the crankcase ventilation valve tears regularly and causes a false air leak. The result is increased oil consumption and rough running.
Symptoms: Whistling or hissing from engine bay, rough idle, fluctuating revs, increased oil consumption, engine can stall on cold start.
Vehicle Weaknesses 12
The engine control unit on the Combo C can fail and cause issues such as running on only 3 cylinders or sporadic power loss. OBD diagnosis required; repair often expensive.
Rubber entry strips collect water; the metal band abrades the paint. Corrosion on the door sills is only visible after the strips are removed.
Deep corrosion forms at the front and rear wheel arches and underbody during winter use.
Control arms, anti-roll bar drop links, and steering bushings wear quickly with commercial use and frequent full loads.
The mechanical handbrake frequently shows insufficient holding force. Brake cables stretch or seize.
On the Combo C, steering bushings and tie rod joints wear faster than on a private car in everyday and commercial use. Typical problem at higher mileages, especially on frequently loaded vehicles.
Lower and middle guide rail of the sliding door: paint flakes off, rust develops. Pre-2004 vehicles used inferior-quality material.
Faulty actuator motors at the sliding door and tailgate. Cable breaks at moving door components or corroded connectors.
The heater matrix becomes blocked by coolant sludge, especially if water rather than coolant concentrate was topped up frequently. The cabin stays cold despite a warm engine.
Leaking gaskets at the thermostat housing lead to slow coolant loss. Head gasket damage can follow if left unaddressed.
The sliding door guide rail corrodes; the plastic protective strip becomes brittle and breaks. Stiff sliding door and moisture ingress.
Plastic clips and connections in the dashboard loosen with age. Rattling noises especially in cold weather and over poor road surfaces.
