EGR Revision Toyota Proace (II) 2.0 D4d

The EGR valve with OE code SU001A4009 è a modular component used on numerous Toyota vehicles equipped with diesel engines 2.0 Euro 5 and Euro 6. This is an advanced version of the EGR valve with an integrated heat exchanger, designed to reduce nitrogen oxide (NOₓ) emissions through controlled recirculation of exhaust gases during combustion. The module è composed of an electronic valve, a water-gas exchanger, and an integrated actuator, offering a’high thermal efficiency and reliable performance over time.

Technical specifications

The EGR module SU001A4009 features a compact and multifunctional structure. The main technical characteristics include:

• Main body in die-cast aluminum or reinforced composite material
• Integrated water-gas heat exchanger with separate passages for coolant and exhaust gas
• Electronically controlled EGR valve with a motorized actuator with 5 poles
• Presence of metal gaskets and fluoroelastomer O-rings for high sealing
• Integrated position sensor for controlling the opening percentage

The module è designed for’direct installation on the exhaust manifold and connection with the cooling and intake circuit.

DIPA has of a series of original and aftermarket quality spare partsà equivalent.

Functionalityà

The primary function of the EGR valve è is to reduce NOₓ emissions by reintroducing a percentage of exhaust gases into’the intake manifold. In the case of the version with an integrated heat exchanger, the gases are cooled before being reintroduced into the engine, improving the’efficiency of the combustion process and further reducing nitrogen oxides. The system è is fully controlled by the engine control unit, which regulates its’opening based on temperature, load, and engine speed. The presence of the EGR module contributes to compliance with Euro 5 and Euro 6 emission regulations.

Brand and model for which the part è mounted

Toyota

• Proace Bus
• Proace Van
• Proace Chassis Cab
• Proace Verso Bus

DIPA recommends to always check compatibilityà based on the specific engine code and chassis number.

Defects and causes

The main defects that can compromise the operation of the EGR valve SU001A4009 include:

• Clogging of the gas ductdue to the’accumulation of particulate and vaporized oil over time
• Failure of the’electric actuatorcaused by internal breakage or errors in the control circuit
• Breakage of the exchanger: può cause coolant leaks and overheating of the module
• Mechanical blockage of the valvedue to fouling from soot or internal corrosion
• Error in the position sensorthat prevents the control unit from correctly modulating the’opening

The mostù frequent damages occur in the presence of oil in the intake circuit, irregular combustion, or the use of dirty fuel.

Any associated DTC codes

DIPA highlights: before installing the valve in the vehicle, è it is essential to clean the entire intake/exhaust circuit (intake manifold, air hoses, throttle body, FAP/DPF, and all components related to exhaust gas and its recirculation). 

Final conclusions

The EGR valve with OE code SU001A4009 è is a complex and strategic component in managing emissions for diesel engines 2.0 Euro 5 and Euro 6 of numerous Toyota vehicles. The module integrates gas recirculation and cooling functions, ensuring high performance and reliabilityà if properly maintained. However, its exposure to high-temperature exhaust gases and soot makes it prone to clogging and electronic failures.

DIPA offers a wide range of spare parts: from original ones to aftermarket options selected from the best manufacturers on the market. Not only that: it also provides refurbished components with performance equal to new ones, which allows for savings in replacement and contributes to the preservation of the’environment thanks to the’circular economy. Also ask about the availabilityà of refurbished parts ready in stock for quick interventions and no waiting times.