Skip to main content
Hi
!
Hi!
Sign in
or
register
Daily Deals
Brand Outlet
Gift Cards
Help & Contact
Sell
Watchlist
Expand Watch List
My eBay
Expand My eBay
Summary
Recently Viewed
Bids/Offers
Watchlist
Purchase History
Buy Again
Selling
Saved Feed
Saved Searches
Saved Sellers
Payments
My Garage
Preferences
My Collection
Messages
PSA Vault
Expand Notifications
Please
sign-in
to view notifications.
Expand Cart
Loading...
eBay Home
Shop by category
All Categories
Search
Advanced
breadcrumb
eBay
eBay Motors
Parts & Accessories
Car & Truck Parts & Accessories
eBay Motors
Parts & Accessories
Car & Truck Parts & Accessories
Engine Cooling Components
Thermostats & Housings
The item you selected has ended, but we found something similar.
View original listing
Confirm this item fits
Add your vehicle to make sure this item fits and qualifies for free returns.
Year
Make
Model
Trim
Engine
Add vehicle
Picture 1 of 2
Picture 1 of 2
Lexus 1603131020 Genuine OEM Factory Original Water Inlet
5.0
2 product ratings
GENUINE PARTS GLOBE (21718)
100% positive feedback
Price:
$49.31
Free shipping
Est. delivery
Sat, Dec 6 - Wed, Dec 10
Estimated delivery Sat, Dec 6 - Wed, Dec 10
Returns:
30 days returns
.
Seller pays for return shipping
.
Condition:
New
New
RC300 - RC350. GS300 - GS350 - GS350h. GS450h - IS250 - IS350 - IS300. GENUINE 2.5L & 3.5L ENGINE THERMOSTAT WITH HOUSING. LEXUS OEM PART. LEXUS FACTORY PART NO.
See full description
Buy It Now
GENUINE OEM LEXUS IS350 IS250 GS350 RC350 V6 THERMOSTAT W/HOUSING 16031-31020
Sign in to check out
Check out as guest
Add to cart
See all details
Oops! Looks like we're having trouble connecting to our server.
Refresh your browser window to try again.
About this product
Product Identifiers
Brand
Lexus
Manufacturer Part Number
1603131020
GTIN
0884109896425
UPC
0884109896425
eBay Product ID (ePID)
1617801220
Product Key Features
Vintage Part
No
Universal Fitment
No
Material
Plastic
California Prop 65 Warning
Yes
Country of Origin
Japan
Dimensions
Weight
2lb.
Show More
Show Less
All listings for this product
Listing type
Buy It Now
Buy It Now
selected
Condition
Any Condition
Any Condition
selected
New
Pre-owned
GENUINE LEXUS GS350 IS250 RC350 GS450h ENGINE THERMOSTAT W/HOUSING 16031-31020
item 1 GENUINE LEXUS GS350 IS250 RC350 GS450h ENGINE THERMOSTAT W/HOUSING 16031-31020
$19.00
+$6.00 shipping
GENUINE LEXUS GS350 IS250 2grfse GS450h ENGINE THERMOSTAT W/HOUSING 16031-31020
item 2 GENUINE LEXUS GS350 IS250 2grfse GS450h ENGINE THERMOSTAT W/HOUSING 16031-31020
$22.00
+$6.00 shipping
2006-2015 LEXUS IS250 IS350 WATER INLET THERMOSTAT HOUSING OEM 16031-31020
item 3 2006-2015 LEXUS IS250 IS350 WATER INLET THERMOSTAT HOUSING OEM 16031-31020
$36.00
Free shipping
Last one
GENUINE OEM LEXUS IS350 IS250 GS350 RC350 V6 THERMOSTAT W/HOUSING 16031-31020
item 4 GENUINE OEM LEXUS IS350 IS250 GS350 RC350 V6 THERMOSTAT W/HOUSING 16031-31020
$49.31
Free shipping
Last one
GENUINE LEXUS GS350 IS250 RC350 GS450h ENGINE THERMOSTAT W/HOUSING 16031-31020
item 5 GENUINE LEXUS GS350 IS250 RC350 GS450h ENGINE THERMOSTAT W/HOUSING 16031-31020
$49.41
Free shipping
16031-31020 Thermostat with Housing - GS450 GS450h IS250 IS350 - Genuine Lexus
item 6 16031-31020 Thermostat with Housing - GS450 GS450h IS250 IS350 - Genuine Lexus
$49.50
Free shipping
13-18 LEXUS RC350 IS350 RWD WATER INLET THERMOSTAT HOUSING 48K MAP164
item 7 13-18 LEXUS RC350 IS350 RWD WATER INLET THERMOSTAT HOUSING 48K MAP164
$54.99
Free shipping
LEXUS OEM FACTORY THERMOSTAT 2006 GS300
item 8 LEXUS OEM FACTORY THERMOSTAT 2006 GS300
$63.95
+$5.00 shipping
LEXUS OEM FACTORY THERMOSTAT 2006-2015 IS250 / IS350
item 9 LEXUS OEM FACTORY THERMOSTAT 2006-2015 IS250 / IS350
$63.95
+$5.00 shipping
Genuine Lexus Water Inlet 16031-31020
item 10 Genuine Lexus Water Inlet 16031-31020
$69.56
Free shipping
Genuine Lexus 2006-2018 Lexus - Water Inlet 16031-31020
item 11 Genuine Lexus 2006-2018 Lexus - Water Inlet 16031-31020
$64.36
+$5.75 shipping
Genuine Lexus Water Inlet 16031-31020
item 12 Genuine Lexus Water Inlet 16031-31020
$73.02
Free shipping
Genuine OEM Engine Coolant Thermostat Kit for Lexus 1603131020
item 13 Genuine OEM Engine Coolant Thermostat Kit for Lexus 1603131020
$78.04
Free shipping
Genuine Lexus Engine Coolant Thermostat Kit 16031-31020
item 14 Genuine Lexus Engine Coolant Thermostat Kit 16031-31020
$74.62
+$7.99 shipping
Genuine Lexus Water Inlet 16031-31020
item 15 Genuine Lexus Water Inlet 16031-31020
$67.02
+$18.88 shipping
For Lexus GS450h 2007-2018 Lexus 1603131020 Engine Coolant Thermostat Kit
item 16 For Lexus GS450h 2007-2018 Lexus 1603131020 Engine Coolant Thermostat Kit
$82.58
See all 16
listings for this product
Ratings and Reviews
Learn more
5.0
2 product ratings
5
2 users rated this 5 out of 5 stars
2
4
0 users rated this 4 out of 5 stars
0
3
0 users rated this 3 out of 5 stars
0
2
0 users rated this 2 out of 5 stars
0
1
0 users rated this 1 out of 5 stars
0
Most relevant reviews
by
brram_5960
May 28, 2025
Exact OEM part for my 2011 is250 AWD. I ...
Exact OEM part for my 2011 is250 AWD. I bought thermostat and water pump at the same time.
Verified purchase:
Yes
Condition:
New
Best Selling in Thermostats & Housings
Genuine OEM Engine Coolant Thermostat for Toyota 90916a3003
(37)
$20.59 New
$20.59 New
---- Used
No used products available
Mopar 52028898AJ Thermostat and Housing - Engine Coolant Thermostat
(10)
$44.52 New
$44.52 New
---- Used
No used products available
Subaru 21200AA072 Thermostat
(69)
$14.99 New
$14.99 New
---- Used
No used products available
Honda Oem-engine Coolant Thermostat 19301RNA315
(13)
$17.91 New
$17.91 New
---- Used
No used products available
21250EZ31A Genuine Nissan Valve ASSY Water Control 21250-ez31a
(3)
$364.54 New
$364.54 New
---- Used
No used products available
Engine Coolant Thermostat-Therm 190 Motorcraft RT-1254
(12)
$8.00 New
$8.00 New
---- Used
No used products available
Genuine OEM Engine Coolant Thermostat for Honda 19301PAA306
(58)
$11.40 New
$11.40 New
---- Used
No used products available
Save on Thermostats & Housings
Trending price is based on prices over last 90 days.
Engine Thermostat for 1988-2015 Honda Civic Accord CRV Odyssey Acura 19301-PAA-3
$11.40
Trending at
$14.53
Genuine Nissan Infiniti 2005-2018 Frontier Xterra 4.0 G35 M35 Thermostat New OEM
$27.13
Trending at
$41.32
OEM Engine Coolant Thermostat Assembly 19301-RAF-004 For Honda Acura TSX ILX
$29.44
Trending at
$41.29
NEW Thermostat w/ O-Ring 5292712 Fits for 2008-2014 Dodge Cummins 6.7L ISB US
$10.99
Trending at
$20.70
Genuine OEM For Honda Acura 19301-P8E-A10 Engine Coolant Thermostat Assembly
$8.88
Trending at
$11.24
Genuine Motorcraft Engine Coolant Thermostat RT-1251
$19.77
Trending at
$24.02
You may also like
Factory/OEM Car and Truck Water Pumps
Genuine OEM Car and Truck Water Pumps
Water Pumps for Lexus IS250
Genuine OEM Water-Resistant Car Covers
Water Pumps for Lexus RX350
Water Pumps for Lexus ES350