How to remove and install the EGR valve on Mazda 6?

In the case of 4-cylinder models, the EGR valve is mounted at the left end of the cylinder head, behind the throttle body. Disconnect the cable with negative battery terminal and drain the cooling system including removing the upper radiator hose on models with 2.5L. The second step is to take out the air cleaner duct and housing and the third one is to detach the electrical connector of the EGR valve. On 2.3L engines, loosen the hose clamp of the coolant hose, and disconnect the upper radiator hose to the passage of coolant outlet, loosen the clamp of the coolant hose and disconnect to the EGR valve. Unscrew the two EGR valve mounting bolts and remove the EGR valve, removing the old gasket and cleaning the surfaces of the two parts. The opposite of the removal is installation, a new gasket is used and the mounting bolts are tightened properly, the cooling system is refilled. On 3.0L V6 models, the EGR valve will be found on the left end of the intake manifold, next to the throttle body. Begin by removing the cable connection to negative battery terminal, removal of electrical connector and vacuum hose connection to EGR valve. Unscrew tube nut that attaches the EGR pipe to the EGR valve, remove the mounting bolts and remove the EGR valve. Wipe away the old gasket and clean the mating surfaces then invert the removal process to install attaching a new gasket and then twisting the mounting nuts.

Genuine Mazda 6 EGR Valve

Emissions EGR Valve

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14 EGR Valves found

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Mazda 6 Solenoid Valve Part Number: L3P9-18-740B
$54.78 MSRP: $73.04
You Save: $18.26 (25%)
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Product Specifications
- Other Name: Valve, Solenoid
- Replaces: L3P9-18-740, L3P9-18-740A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2008 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Part Number: L518-18-741
$61.90 MSRP: $82.55
You Save: $20.65 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve, Solenoid; Solenoid
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2009-2013 Mazda 6 | i | 4 Cyl 2.5 L GAS
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Mazda 6 Solenoid Valve Part Number: LF82-18-740
$75.10 MSRP: $100.15
You Save: $25.05 (26%)
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Product Specifications
- Other Name: Valve, Solenoid; Solenoid Valve
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2009-2013 Mazda 6 | i | 4 Cyl 2.5 L GAS
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Mazda 6 Solenoid Valve Part Number: L3K9-18-740B
$101.53 MSRP: $135.39
You Save: $33.86 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve, Solenoid
- Replaces: L3K9-18-740A, L3K9-18-740
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2007 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Part Number: L301-18-741
$120.48 MSRP: $160.67
You Save: $40.19 (26%)
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Product Specifications
- Other Name: Valve & Switch; Solenoid
- Replaces: L801-18-741
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2008 Mazda 6 | i, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Valve Part Number: L321-18-740C
$130.79 MSRP: $174.42
You Save: $43.63 (26%)
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Product Specifications
- Other Name: Valve, Solenoid
- Replaces: L321-18-740A, L321-18-740B
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2005 Mazda 6 | i, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Valve Part Number: BP4Y-18-741
$142.39 MSRP: $189.88
You Save: $47.49 (26%)
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Product Specifications
- Other Name: Valve, Solenoid W/O Bracket; Check Valve, Purge Solenoid
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2008 Mazda 6 | S | 6 Cyl 3.0 L GAS
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Mazda 6 EGR Valve Part Number: LFHJ-20-300
$192.58 MSRP: $256.82
You Save: $64.24 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve, E.G.R.
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2013 Mazda 6 | i | 4 Cyl 2.5 L GAS
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Mazda 6 EGR Valve Part Number: L3K9-20-300B
$522.83 MSRP: $702.88
You Save: $180.05 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve, E.G.R.
- Replaces: L3K9-20-300, L3K9-20-300A, L3K9-20-300A-9U
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2006-2007 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Valve Part Number: L391-18-740C
$42.69 MSRP: $56.93
You Save: $14.24 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve, Solenoid
- Replaces: L391-18-740B, L391-18-740, L391-18-740A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2004-2005 Mazda 6 | i, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Valve Part Number: Z504-18-741A
$119.15 MSRP: $158.90
You Save: $39.75 (26%)
ADD TO CART
Product Specifications
- Other Name: Valve, Solenoid; Check Valve, Purge Solenoid
- Replaces: Z504-18-741
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2005 Mazda 6 | i, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 Solenoid Valve Part Number: ZM03-18-741
$93.09 MSRP: $124.14
You Save: $31.05 (26%)
ADD TO CART
Product Specifications
- Other Name: Valve, Solenoid
- Replaces: ZM03-18-740
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2008 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 EGR Valve Part Number: ZZDA-20-300
$85.39 MSRP: $113.87
You Save: $28.48 (26%)
ADD TO CART
Product Specifications
- Other Name: Valve, E.G.R.
- Replaces: LF01-20-300, LF01-20-300A
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2013 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.0 L GAS
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Mazda 6 EGR Valve Part Number: AJ51-20-300B-9U
Product Specifications
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following Vehicles:
- 2003-2008 Mazda 6 | i, Mazdaspeed, S | 4 Cyl 2.3 L GAS, 6 Cyl 3.0 L GAS

Mazda 6 EGR Valve

The Mazda 6 EGR Valve reduces the heat of combustion so that the engine produces significantly less nitrogen oxides when driving. The EGR Valve directs a controlled amount of inert exhaust gas out of the exhaust manifold and dilutes the fresh air charge of fuel, restricts oxygen, and reduces peak flame temperature to less than the 2,500-degree level at which NOx is produced. The ability of the EGR Valve unit to open only at the discretion of the computer logic during steady cruise or gentle throttle operation and remain closed during cold starts, idle operation, and wide open bursts as opposed to rough operation is achieved by placing the valve body between the exhaust passage and the intake manifold. Early Mazda models applied a vacuum diaphragm style of EGR Valve, and subsequent models applied electric motor control, which is adjusted by the engine computer to achieve more precise control. Types of vacuum can be ported vacuum, positive backpressure, or negative backpressure sensing to determine the distance of the raised pintle, but electronic, digital, or linear versions utilize pulse-width signaling, flow sensors, and even coolers to give tighter control of the emissions. The EGR Valves are varied by operation in terms of actuation and feedback complexity, but all have the same objective. Should any style be retained under carbon load, spark knock, hesitation, or a lit check engine lamp may become the order of the day, and therefore Mazda 6 drivers of today have an advantage since the passages remain clear and the fuel economy, smooth acceleration, and compliance with emissions are not compromised and the Mazda power engine has been reliable.

Looking for EGR Valve with proven quality? Choose OEM EGR Valve. Mazda designs and builds them to strict factory specs. Every piece goes through rigorous quality checks. You'll get parts that fit right and work like new. Shop our huge inventory of OEM Mazda 6 parts. Enjoy the highly competitive prices online. Our site is your one-stop shop. Each genuine 6 part includes a manufacturer's warranty. Buy with confidence. Our return policy is simple and hassle-free. In a rush? Choose expedited delivery at checkout. You'll love the streamlined experience from search to checkout to receiving your order.

Mazda 6 EGR Valve Parts and Q&A

Solenoid Valve
ZM03-18-741
Q: How to remove and install the EGR valve on Mazda 6?
A:
In the case of 4-cylinder models, the EGR valve is mounted at the left end of the cylinder head, behind the throttle body. Disconnect the cable with negative battery terminal and drain the cooling system including removing the upper radiator hose on models with 2.5L. The second step is to take out the air cleaner duct and housing and the third one is to detach the electrical connector of the EGR valve. On 2.3L engines, loosen the hose clamp of the coolant hose, and disconnect the upper radiator hose to the passage of coolant outlet, loosen the clamp of the coolant hose and disconnect to the EGR valve. Unscrew the two EGR valve mounting bolts and remove the EGR valve, removing the old gasket and cleaning the surfaces of the two parts. The opposite of the removal is installation, a new gasket is used and the mounting bolts are tightened properly, the cooling system is refilled. On 3.0L V6 models, the EGR valve will be found on the left end of the intake manifold, next to the throttle body. Begin by removing the cable connection to negative battery terminal, removal of electrical connector and vacuum hose connection to EGR valve. Unscrew tube nut that attaches the EGR pipe to the EGR valve, remove the mounting bolts and remove the EGR valve. Wipe away the old gasket and clean the mating surfaces then invert the removal process to install attaching a new gasket and then twisting the mounting nuts.