What are the signs of water pump failure and how to check on Lexus ES300?

A failure in the water pump can lead to engine damage due to overheating. To check if the water pump is working properly, squeeze the upper radiator hose while the engine is running and warmed to normal operating temperature. A pressure surge should be felt as the hose is released. Water pumps have weep or vent holes, and if there is a failure in the pump seal, coolant will leak from this hole. To find the hole in the water pump, use a flashlight to look through the space behind the pulley just below the water pump shaft. A slight gray discoloration around the weep hole is normal, while dark brown stains indicate a problem. If the water pump shaft bearings fail, there may be a howling sound at the front of the engine while it is running. Bearing wear can be felt if the water pump pulley is rocked up and down. However, do not mistake drive belt slippage, which causes a squealing sound, for water pump failure. Spray automotive drive belt dressing on the belts to eliminate the belt as a possible cause of the noise.

What are the potential consequences of a failure in the water pump and how can one identify issues with it on Lexus RX350?

If the water pump is worn out, it can cause overheating of the engine and this may result to severe loss of the engine. The water pumps are equipped with weep or vent hole and if there is a failure with the pump seal, the coolant will seep out of this hole. Some models may require the use of a flashlight to identify the hole since the hole is located in the space behind the pulley just below the water pump shaft. Generally, a slight gray discolouration around the weep hole is normal, in contrast to dark brown stains that point at a defect. In case the water pump shaft bearings are worn out, one will hear a howling sound at the front of the engine when the engine is on, and the bearing wear can be tested by rocking of the water pump pulley vertically. It must be borne in mind not to interchangeability between drivebelt slippage, which gives a squealing noise, and water pump failure; use of automotive drivebelt dressing on the belts can rule out the belt as a source of noise.

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62 Water Pumps found

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Lexus Water Pump Assembly
Part Number: 16100-09442
$153.71 MSRP: $209.57
You Save: $55.86 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly, Water; Water Pump
- Manufacturer Note: (L)
- Replaces: 16100-39455, 16100-09440, 16100-09441, 16100-39456
Fits the following Lexus Models:
- ES300h | 2013-2018 | 6 Cyl 3.5L
- ES350 | 2007-2018 | 6 Cyl 3.5L
- RX330 | 2006 | STD | 6 Cyl 3.5L
- RX350 | 2007-2015 | STD | 6 Cyl 3.5L
- RX450h | 2010-2015 | STD | 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-29085
$77.95 MSRP: $105.41
You Save: $27.46 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump, Water Pump Assembly
- Replaces: 16100-09070
Fits the following Lexus Models:
- ES300 | 1993-2003 | 6 Cyl 3.0L, 6 Cyl 3.3L
- ES330 | 2004-2006 | 6 Cyl 3.0L, 6 Cyl 3.3L
- RX300 | 1999-2003 | 6 Cyl 3.0L
- RX330 | 2004-2006 | STD | 6 Cyl 3.3L
- RX350 | 2007 | STD | 6 Cyl 3.3L
- RX400h | 2006-2008 | STD | 6 Cyl 3.3L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39436
$156.51 MSRP: $213.39
You Save: $56.88 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump, Water Pump Assembly
- Replaces: 16100-39435
Fits the following Lexus Models:
- GS Turbo | 2017 | 6 Cyl 3.5L
- GS200t | 2016 | 6 Cyl 2.5L, 6 Cyl 3.5L
- GS300 | 2018-2019, 2006 | 6 Cyl 3.0L, 6 Cyl 3.5L
- GS350 | 2013-2019, 2007-2011 | 6 Cyl 2.5L, 6 Cyl 3.0L, 6 Cyl 3.5L
- GS430 | 2006-2007 | 6 Cyl 3.0L, 6 Cyl 3.5L
- GS450h | 2013-2018, 2007-2011 | 6 Cyl 2.5L, 6 Cyl 3.5L
- GS460 | 2008-2011 | 6 Cyl 3.5L
- IS Turbo | 2017 | LUX | 6 Cyl 3.5L
- IS200t | 2016 | LUX | 6 Cyl 2.5L, 6 Cyl 3.5L
- IS250 | 2006-2015 | 250C, 350C, LUX | 6 Cyl 2.5L, 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-59275
$149.56 MSRP: $202.25
You Save: $52.69 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-09201
Fits the following Lexus Models:
- GS300 | 1998-2006 | 8 Cyl 4.0L, 8 Cyl 4.3L
- GS350 | 2007-2008 | 8 Cyl 4.3L
- GS400 | 1998-2000 | 8 Cyl 4.0L, 8 Cyl 4.3L
- GS430 | 2001-2007 | 8 Cyl 4.0L, 8 Cyl 4.3L
- GS460 | 2008 | 8 Cyl 4.3L
- GX470 | 2003-2009 | 8 Cyl 4.7L
- LS400 | 1997-2000 | 8 Cyl 4.0L
- LS430 | 2001-2006 | 8 Cyl 4.3L
- LX470 | 1998-2007 | 8 Cyl 4.7L
- SC300 | 1997-2000 | 8 Cyl 4.0L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39595
$122.84 MSRP: $167.48
You Save: $44.64 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump
Fits the following Lexus Models:
- GS Turbo | 2017 | 4 Cyl 2.0L
- GS200t | 2016 | 4 Cyl 2.0L
- GS300 | 2018-2019 | 4 Cyl 2.0L
- GS350 | 2015-2020 | 4 Cyl 2.0L
- GS450h | 2015-2018 | 4 Cyl 2.0L
- IS Turbo | 2017 | LUX | 4 Cyl 2.0L
- IS200t | 2016 | LUX | 4 Cyl 2.0L
- IS250 | 2015 | LUX | 4 Cyl 2.0L
- IS300 | 2016-2024 | LUX | 4 Cyl 2.0L
- IS350 | 2015-2024 | LUX | 4 Cyl 2.0L
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Lexus Engine Water Pump Assembly
Part Number: 16100-09690
$140.78 MSRP: $191.93
You Save: $51.15 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump
- Manufacturer Note: (L)
Fits the following Lexus Models:
- ES250 | 2021-2024 | 6 Cyl 3.5L
- ES350 | 2019-2024 | 6 Cyl 3.5L
- RX350 | 2016-2022 | 6 Cyl 3.5L
- RX450h | 2016-2022 | 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39506
$187.62 MSRP: $255.81
You Save: $68.19 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump, Water Pump Assembly
- Replaces: 16100-39505
Fits the following Lexus Models:
- GS F | 2016-2020 | 8 Cyl 5.0L
- GS350 | 2007-2011 | 8 Cyl 4.6L
- GS430 | 2007 | 8 Cyl 4.6L
- GS460 | 2008-2011 | 8 Cyl 4.6L
- IS F | 2008-2014 | 8 Cyl 5.0L
- IS300 | 2021-2024 | LUX | 8 Cyl 5.0L
- IS350 | 2021-2024 | LUX | 8 Cyl 5.0L
- IS500 | 2022-2024 | LUX | 8 Cyl 5.0L
- LC500 | 2018-2024 | 8 Cyl 5.0L
- LC500h | 2018-2024 | 8 Cyl 5.0L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39435
$157.80 MSRP: $213.39
You Save: $55.59 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-39436
Fits the following Lexus Models:
- GS300 | 2006 | 6 Cyl 3.0L, 6 Cyl 3.5L
- GS350 | 2007-2010 | 6 Cyl 3.0L, 6 Cyl 3.5L
- GS430 | 2006-2007 | 6 Cyl 3.0L, 6 Cyl 3.5L
- GS450h | 2007-2010 | 6 Cyl 3.5L
- GS460 | 2008-2010 | 6 Cyl 3.5L
- IS250 | 2006-2010 | 6 Cyl 2.5L, 6 Cyl 3.5L
- IS350 | 2006-2010 | 6 Cyl 2.5L, 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39456
$153.71 MSRP: $209.57
You Save: $55.86 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assy, Engine Water
- Manufacturer Note: (J)
- Replaced by: 16100-09442
Fits the following Lexus Models:
- ES300h | 2013-2018 | 6 Cyl 3.5L
- ES350 | 2009-2018 | 6 Cyl 3.5L
- RX350 | 2010-2015 | STD | 6 Cyl 3.5L
- RX450h | 2010-2015 | STD | 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-49876
$174.28 MSRP: $235.68
You Save: $61.40 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-49876-83
Fits the following Lexus Models:
- GS300 | 2001-2005 | 6 Cyl 3.0L
- GS430 | 2001-2005 | 6 Cyl 3.0L
- IS300 | 2001-2005 | 6 Cyl 3.0L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39455
$153.71 MSRP: $209.57
You Save: $55.86 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-09442
Fits the following Lexus Models:
- ES350 | 2007-2010 | 6 Cyl 3.5L
- RX330 | 2006 | STD | 6 Cyl 3.5L
- RX350 | 2007-2010 | STD | 6 Cyl 3.5L
- RX450h | 2010 | STD | 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 161A0-29015
$265.30 MSRP: $367.74
You Save: $102.44 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assy, Electrical ; Pump Assy, Engine Water; Water Pump
- Replaces: 161A0-39015
Fits the following Lexus Models:
- CT200h | 2011-2017 | B, E | 4 Cyl 1.8L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39555
$158.66 MSRP: $214.56
You Save: $55.90 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-09525
Fits the following Lexus Models:
- GX460 | 2010-2023 | G, Z | 8 Cyl 4.6L
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Lexus Engine Water Pump Assembly
Part Number: 16100-09441
$153.71 MSRP: $209.57
You Save: $55.86 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assy, Engine Water
- Manufacturer Note: (L)
- Replaced by: 16100-09442
Fits the following Lexus Models:
- ES350 | 2016-2017 | 6 Cyl 3.5L
- RX350 | 2010-2015 | STD | 6 Cyl 3.5L
- RX450h | 2010-2015 | STD | 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-09070
$79.21 MSRP: $105.41
You Save: $26.20 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water
- Replaced by: 16100-29085
Fits the following Lexus Models:
- RX300 | 2002-2003 | 6 Cyl 3.0L
- RX330 | 2004-2006 | STD | 6 Cyl 3.3L
- RX350 | 2007 | STD | 6 Cyl 3.3L
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Lexus Engine Water Pump Assembly
Part Number: 16100-09491
$151.63 MSRP: $206.74
You Save: $55.11 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump, Water Pump Assembly
- Manufacturer Note: (L),*145
- Replaces: 16100-39496, 16100-09490, 16100-39495
Fits the following Lexus Models:
- LX570 | 2008-2021 | 8 Cyl 5.7L
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Lexus Engine Water Pump Assembly
Part Number: 161A0-39025
$337.42 MSRP: $467.71
You Save: $130.29 (28%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assy, Electrical ; Pump Assy, Engine Water; Water Pump
Fits the following Lexus Models:
- ES300h | 2013-2018 | 4 Cyl 2.5L
- ES350 | 2013-2015 | 4 Cyl 2.5L
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Lexus Water Pump Assembly
Part Number: 16100-39616
$140.41 MSRP: $191.44
You Save: $51.03 (27%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly, Water; Water Pump
- Manufacturer Note: (J)
- Replaces: 16100-39615
Fits the following Lexus Models:
- ES250 | 2021-2024 | 6 Cyl 3.5L
- ES300h | 2019-2024 | 6 Cyl 3.5L
- ES350 | 2019-2024 | 6 Cyl 3.5L
- GS Turbo | 2017 | 6 Cyl 3.5L
- GS200t | 2016 | 6 Cyl 3.5L
- GS300 | 2018-2019 | 6 Cyl 3.5L
- GS350 | 2015-2020 | 6 Cyl 3.5L
- GS450h | 2015-2018 | 6 Cyl 3.5L
- IS Turbo | 2017 | LUX | 6 Cyl 3.5L
- IS300 | 2017-2024 | LUX | 6 Cyl 3.5L
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Lexus Water Pump Assembly
Part Number: 16100-79505
$133.09 MSRP: $181.46
You Save: $48.37 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assembly, Water; Water Pump
Fits the following Lexus Models:
- LS500 | 2018-2024 | 6 Cyl 3.5L
- LS500h | 2018-2024 | 6 Cyl 3.5L
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Lexus Engine Water Pump Assembly
Part Number: 16100-39575
$107.61 MSRP: $145.53
You Save: $37.92 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump Assy, Engine Water; Water Pump
Fits the following Lexus Models:
- NX200t | 2015-2017 | 4 Cyl 2.5L
- NX300 | 2018-2021 | 4 Cyl 2.5L
- NX300h | 2015-2021 | 4 Cyl 2.5L
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1-20 of 62 Results

About Lexus Water Pump

The water pump is the heart of a car's cooling system as it transports water cooled by the radiator to the engine block. After the cooled water goes through the engine block, it is sent back through the pump to the radiator, creating a constant, ever-flowing supply of needed cool water. If the Lexus water pump stops functioning, the coolant temperature remains stagnant and the engine will over-heat, majorly damaging its components.

Lexus Water Pump Parts Questions & Experts Answers

Engine Water Pump Assembly
16100-29085
Q: What are the signs of water pump failure and how to check on Lexus ES300?
A:
A failure in the water pump can lead to engine damage due to overheating. To check if the water pump is working properly, squeeze the upper radiator hose while the engine is running and warmed to normal operating temperature. A pressure surge should be felt as the hose is released. Water pumps have weep or vent holes, and if there is a failure in the pump seal, coolant will leak from this hole. To find the hole in the water pump, use a flashlight to look through the space behind the pulley just below the water pump shaft. A slight gray discoloration around the weep hole is normal, while dark brown stains indicate a problem. If the water pump shaft bearings fail, there may be a howling sound at the front of the engine while it is running. Bearing wear can be felt if the water pump pulley is rocked up and down. However, do not mistake drive belt slippage, which causes a squealing sound, for water pump failure. Spray automotive drive belt dressing on the belts to eliminate the belt as a possible cause of the noise.
Engine Water Pump Assembly
16100-39455
Q: What are the potential consequences of a failure in the water pump and how can one identify issues with it on Lexus RX350?
A:
If the water pump is worn out, it can cause overheating of the engine and this may result to severe loss of the engine. The water pumps are equipped with weep or vent hole and if there is a failure with the pump seal, the coolant will seep out of this hole. Some models may require the use of a flashlight to identify the hole since the hole is located in the space behind the pulley just below the water pump shaft. Generally, a slight gray discolouration around the weep hole is normal, in contrast to dark brown stains that point at a defect. In case the water pump shaft bearings are worn out, one will hear a howling sound at the front of the engine when the engine is on, and the bearing wear can be tested by rocking of the water pump pulley vertically. It must be borne in mind not to interchangeability between drivebelt slippage, which gives a squealing noise, and water pump failure; use of automotive drivebelt dressing on the belts can rule out the belt as a source of noise.

Related Lexus Parts

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