Cheap Nissan Interstar Throttle Body

The Nissan Interstar (sold in the UK from around 2002 to 2010, based on the Renault Master / Opel Movano platform) was exclusively diesel-powered in all variants offered here, using engines such as the 2.2 dCi and 2.5 dCi units. Diesel engines do not use a throttle body in the conventional sense — fuelling is controlled directly at the injectors, not by a butterfly valve in the intake — so a traditional throttle body is not a component that was ever fitted to the Interstar. If you are looking to control or restrict airflow on a diesel Interstar, the component you may actually be thinking of is the EGR valve, the intake swirl flap, or the inlet manifold assembly, any of which can cause similar symptoms to a faulty throttle body on a petrol vehicle.

On a diesel-engined Interstar, a rough idle is far more likely to be caused by a faulty EGR valve, a sticking swirl flap motor, a dirty or restricted intake manifold, or a fuelling issue such as a failing injector or fuel pressure regulator. These components perform some of the airflow-management functions that a throttle body handles on a petrol engine, and they are available as used parts through breakers on Findapart. It is worth having the fault codes read first, as the code will usually point clearly to which component is at fault before you start sourcing parts.

No — the Interstar's diesel intake system is fundamentally different in design from a petrol intake, and a throttle body from a petrol vehicle would not physically or mechanically suit it. The diesel engine manages power output through fuel delivery rather than air restriction, so grafting a petrol throttle body into the system serves no purpose and could cause serious running problems. If a breaker or listing is offering a throttle body described as fitting a diesel Interstar, treat that with caution and confirm the exact part and engine code with the breaker directly.

For the 2.5 dCi Interstar, the most commonly replaced airflow-related components are the EGR valve, the EGR cooler, the swirl flap actuator, and the intake manifold — these are the parts that regulate exhaust gas recirculation and intake air on this engine. When contacting a breaker, quote your engine code (found on your V5 or via a VIN check) as well as your year of manufacture, since there were detail differences across the production run from 2002 to 2010. Providing the engine code gives the breaker the best chance of matching the correct part to your vehicle.

For engine-related components such as the EGR valve, swirl flap, or intake manifold, the wheelbase and body length make no difference whatsoever — these parts follow the engine code, not the body configuration. What matters is your engine code, fuel type (all UK Interstars were diesel), and the year of manufacture, as component specifications could vary across the production run. Confirm the exact part number with your breaker against your registration to be certain.