How to replace the PCV valve on Lexus RX350?

On all models except 1AR-FE four-cylinder engines, the PCV valve is located in the valve cover. On 1AR-FE models, the PCV valve is mounted in the crankcase breather on the front side of the engine block. On 1AR-FE models, remove the intake manifold. On all models, disconnect the hose. On models with a rubber grommet, pull the PCV valve from the cover; on all other models unscrew the PCV valve from the cover or breather. On all models except 1AR-FE four--cylinder engines, remove the valve from the hose. On all models, remove the valve, then blow through the valve from the valve cover or breather case end. With the engine idling at normal operating temperature, place your finger over the valve opening. If there's no vacuum at the valve, check for a plugged hose or valve. Replace any plugged or deteriorated hoses. Turn off the engine. If air will not pass through the valve in this direction, replace it with a new one. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size. Compare the old valve with the new one to make sure they're the same.

Genuine Lexus RX350 PCV Valve

Position Crank Ventilation Valve

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7 PCV Valves found

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Lexus RX350 Ventilation Valve Sub-Assembly
Part Number: 12204-31040
$6.57 MSRP: $8.46
You Save: $1.89 (23%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2007-2009 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFE; GSU30L-AWAGKA, GSU30L-CWAGKA, GSU35L-AWAGKA, GSU35L-CWAGKA
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Lexus RX350 Ventilation Valve Sub-Assembly
Part Number: 12204-20040
$8.24 MSRP: $10.63
You Save: $2.39 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2007 Lexus RX350 | STD | 6 Cyl 3.3L | 3MZFE; MCU33L-AWAGKA, MCU33L-CWAGKA, MCU38L-AWAGKA, MCU38L-CWAGKA
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Lexus RX350 Ventilation Valve Sub-Assembly
Part Number: 12204-31120
$6.57 MSRP: $8.46
You Save: $1.89 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2008-2015 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFE; GGL10L-AWTGKA, GGL10L-CWTGKA, GGL15L-AWTGKA, GGL15L-CWTGKA, GGL15L-CWZGKA, GSU30L-AWAGKA, GSU35L-AWAGKA
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Lexus RX350 Ventilation Valve Sub-Assembly
Part Number: 12204-31150
$8.31 MSRP: $10.63
You Save: $2.32 (22%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Valve Sub-Assy, Ventilation
- Manufacturer Note: (J)
- Replaced by: 12204-0P020
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2016-2022 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFKS, 2GRFXS; GGL20L-CWZGBA, GGL25L-AWZGBA, GGL25L-BWZGBA, GGL25L-CWZGBA, GYL20L-CWXGBA, GYL25L-AWXGBA, GYL25L-CWXGBA
View related parts
Lexus RX350 Ventilation Valve Sub-Assembly
Part Number: 12204-0P020
$8.24 MSRP: $10.63
You Save: $2.39 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Manufacturer Note: (L)
- Replaces: 12204-31150
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2016-2022 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFKS, 2GRFKS; GGL20L-CWZGBA, 2GRFXS; GGL20L-CWZGBA, GGL25L-AWZGBA, GGL25L-BWZGBA, GGL25L-CWZGBA, GYL20L-CWXGBA, GYL25L-AWXGBA, GYL25L-CWXGBA
View related parts
Lexus RX350 Ventilation Valve Sub-Assembly
Part Number: 12204-31100
$10.31 MSRP: $13.29
You Save: $2.98 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2010-2015 Lexus RX350 | STD | 6 Cyl 3.5L | 2GRFXE; GYL10L-AWXGKA, GYL10L-CWXGKA, GYL15L-AWXGKA, GYL15L-CWXGKA
View related parts
Lexus RX350 VALVE SUB-ASSY, VENT
Part Number: 12204-25030
$10.82 MSRP: $13.96
You Save: $3.14 (23%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: PCV Valve
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2023-2025 Lexus RX350 | 4 Cyl 2.4L | T24AFTS; TALA10L-AWZGTA, TALA10L-CWZGTA, TALA15L-CWZGTA, TALH17L-AWTGTA, TALH17L-CWTGTA

Lexus RX350 PCV Valve

The Lexus RX350 PCV Valve plays a crucial role by drawing harmful gases from the crankcase back into the cylinders so that they burn clean. For Lexus owners, located on the opposite side of the crankcase from the breather, this PCV Valve reacts to intake manifold vacuum, remaining almost closed at idle to prevent a lean mix, then opening further under throttle to cope with higher blow-by. By recycling partially burnt vapors, the machine keeps the oil fresher, reduces sludge, improves compression, and reduces emissions escaping the vehicle, which helps every Lexus model meet environmental standards while providing RX350 drivers with a smoother driving experience. While some later RX350 versions received minor adjustments in mounting angles and hose routing, other RX350 models continued to employ the same basic spring-loaded PCV Valve design rather than more complicated electronic or multi-stage designs, so in terms of function, differences are still small. Acting as a flame arrestor, the component protects the crankcase from backfire or boost surges. A clean PCV Valve also maintains steady idle, smooth acceleration, and good fuel economy, and the PCV Valve remains a simple part that can be replaced, making periodic checks important to the long-term health of any Lexus RX350 on the road.

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus RX350 PCV Valve available on LexusPartsNow.com. Our OEM Lexus RX350 PCV Valve come with the reassurance of the manufacturer's warranty, a hassle-free return policy, and speedy delivery service, all at affordable prices online. Feel free to shop with confidence!

Lexus RX350 PCV Valve Parts Questions & Experts Answers

Ventilation Valve Sub-Assembly
12204-31040
Q: How to replace the PCV valve on Lexus RX350?
A:
On all models except 1AR-FE four-cylinder engines, the PCV valve is located in the valve cover. On 1AR-FE models, the PCV valve is mounted in the crankcase breather on the front side of the engine block. On 1AR-FE models, remove the intake manifold. On all models, disconnect the hose. On models with a rubber grommet, pull the PCV valve from the cover; on all other models unscrew the PCV valve from the cover or breather. On all models except 1AR-FE four--cylinder engines, remove the valve from the hose. On all models, remove the valve, then blow through the valve from the valve cover or breather case end. With the engine idling at normal operating temperature, place your finger over the valve opening. If there's no vacuum at the valve, check for a plugged hose or valve. Replace any plugged or deteriorated hoses. Turn off the engine. If air will not pass through the valve in this direction, replace it with a new one. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size. Compare the old valve with the new one to make sure they're the same.