Where is the Coolant Temperature Sensors Located and How to Replace it in a Subaru Legacy?

The ECT sensor is located beneath the rear right intake manifold runner, just above the rear right part of the engine block for non-turbocharged models from 2000 to 2004. It is screwed into the backside of the coolant passage that's bolted to the top of the block. Disconnect negative battery terminal cable. Partially drain engine coolant below sensor level. Remove air intake duct and air filter housing. Disconnect ECT sensor electrical connector. Unscrew ECT sensor from coolant passage.Remove and replace.Authors must wrap Teflon tape around threads to prevent leakage of coolant at threads.Installation is just like removal.Fill cooling system back up with antifreeze.The ECT sensor on turbocharged models and 2005+ non-turbocharged models is situated under alternator, ontop of the engine block. Disconnect negative battery terminal cable.A portion of coolant should be drained to keep it lower than this sensors.The Engine Cover should be removed in Legacy and Outback Turbo Charged Models (from 2005) as well as Foresters (from 2006). Remove alternator if fitted.Disengage the electrical connector attached to this sensor.Unscrew out ECT Sensor.After removing it again, I must use Teflon tape around its thread points so that no more coolant comes out during installation.This step will reverse what has been done before.Refilling of cooling system should be done afterwards.

Genuine Subaru Legacy Coolant Temperature Sensors

Coolant Temperature Sensor

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13 Coolant Temperature Sensors found

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Subaru Legacy Sensor Assembly Temperature
Part Number: 22630AA140
$29.62 MSRP: $42.93
You Save: $13.31 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Temperature; Coolant Temp Sensor, Temp Sensor
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2012 Subaru Legacy | 2.5GT Limited, 2.5GT Premium, 3.0R, 3.0R Limited, 3.0R LL-Bean, 3.6R, 3.6R Limited, 3.6R Premium, GT, GT Limited, XT Limited | 2.5L H4 Turbo, 3.0L H6, 3.6L H6
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Subaru Legacy Coolant Temperature Sensor
Part Number: 22630AA230
$44.06 MSRP: $63.85
You Save: $19.79 (31%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Temp Sensor; Engine Coolant
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013-2019 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring, 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 2.5L H4, 3.6L H6
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Subaru Legacy Sensor Assembly Temp
Part Number: 22630AA161
$30.14 MSRP: $43.68
You Save: $13.54 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Temperature; Coolant Temp Sensor, Temp Sensor
- Replaces: 22630AA160, 22630AA100, 22630AA11A
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2000-2004 Subaru Legacy | Baja, Baja-B, Baja-S, Base, Brighton, Cold Weather, Flat6, Flat6 L.L.Bean, Flat6-S, GT, L, L-S, Limited, SUS Flat6, SUS Limited | 2.5L H4, 2.5L H4 Turbo, 3.0L H6
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Subaru Legacy Temp Sensor Assembly
Part Number: 22630AA27A
$52.90 MSRP: $76.67
You Save: $23.77 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Temperature
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring, 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.4L H4 DIT, 2.5L H4 DI
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Subaru Legacy Temperature Sensor
Part Number: 22630AA041
$23.12 MSRP: $33.50
You Save: $10.38 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Temperature; Coolant Temp Sensor, Temp Sensor
- Replaces: 22630AA040
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1990-1999 Subaru Legacy | Base, Brighton, GT, L, LS, LS-D, LS-I, Out Back, Post, SUS, Turbo | 2.2L H4, 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4
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Subaru Legacy Sensor Assembly Temperature
Part Number: 22630AA11A
$30.14 MSRP: $43.68
You Save: $13.54 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Temperature
- Replaced by: 22630AA161
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2000-2004 Subaru Legacy | Baja, Baja-S, Base, Brighton, Cold Weather, GT, L, Limited, L-S, SUS Limited | 2.5L H4
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Subaru Legacy Temperature Sensor
Part Number: 22630AA100
$30.14 MSRP: $43.68
You Save: $13.54 (31%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Temperature
- Replaced by: 22630AA161
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2001-2003 Subaru Legacy | Flat6, Flat6 L.L.Bean, SUS Flat6 | 3.0L H6
View related parts
Subaru Legacy Sensor Assembly Temp
Part Number: 22630AA160
$30.14 MSRP: $43.68
You Save: $13.54 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Temperature
- Replaced by: 22630AA161
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2003-2004 Subaru Legacy | Baja-B, Flat6, Flat6 L.L.Bean, Flat6-S, SUS Flat6 | 2.5L H4 Turbo, 3.0L H6
View related parts
Subaru Legacy Temperature Sensor
Part Number: 22630AA040
$23.12 MSRP: $33.50
You Save: $10.38 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Temperature
- Replaced by: 22630AA041
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1990-1993 Subaru Legacy | Base, L, LS, LS-D, Turbo
View related parts
Subaru Legacy Sensor Assembly Temperature
Part Number: 22630KA140
$39.68 MSRP: $57.50
You Save: $17.82 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Assembly-Temperature; Coolant Temp Sensor
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2019 Subaru Legacy | 3.6R, 3.6R Limited, 3.6R Premium, 3.6R Touring | 3.6L H6
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Subaru Legacy Sen Assembly-Temp
Part Number: 22630AA300
$75.69 MSRP: $109.70
You Save: $34.01 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
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Subaru Legacy Temperature Sensor
Part Number: 21203AA030
$32.49 MSRP: $47.08
You Save: $14.59 (31%)
Product Specifications
- Other Name: Gauge Assembly-Thermo; Temp Sending Unit
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1990-1999 Subaru Legacy | Base, Brighton, GT, L, LS, LS-D, LS-I, Out Back, Post, SUS, Turbo | 2.2L H4 , 2.2L H4 (New EVAPO), 2.2L H4 Series, 2.5L H4
View related parts
Subaru Legacy Sensor Assembly-Temp
Part Number: 22630AA17A
Product Specifications
- Other Name: Sensor Assembly-Temperature; Coolant Temp Sensor, Temp Sensor
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2017 Subaru Legacy | 2.5i, 2.5i Base, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring, Base | 2.5L H4, 2.5L H4 DOHC, 2.5L H4 SOHC

Subaru Legacy Coolant Temperature Sensors

Subaru Legacy Coolant Temperature Sensors keep track of coolant heat so the engine stays in its sweet spot of performance and safety. By constantly reading the liquid's temperature, these Coolant Temperature Sensors feed critical data to the vehicle's control unit, which then balances fuel mixture and ignition timing to match real time thermal needs. The design relies on a thermistor that changes electrical resistance as coolant warms or cools, and they turn those heat shifts into voltage signals the computer can interpret instantly. Across the production years the same straightforward sensing method has remained in the Coolant Temperature Sensors, meaning drivers of any Legacy edition receive identical protection against overheating and under heating, with no distinct generations or alternative styles mentioned in the available details. Using direct electronic feedback rather than mechanical gauges allows rapid response, within milliseconds, Coolant Temperature Sensors send updates to adjust strategy, letting Subaru onboard computers protect components while supporting power, economy, and cleaner exhaust. Durable and precise Coolant Temperature Sensors form a small yet essential link that helps every Subaru Legacy run smoothly under varied driving conditions.

Our website stands as the go-to online destination for OEM Subaru Legacy Coolant Temperature Sensors. With complete lines of genuine Subaru Legacy Coolant Temperature Sensors available at unbeatable market prices, we ensure top quality, reliability, and durability. Each part comes backed by the manufacturer's warranty, reinforcing your trust in our offerings.

Subaru Legacy Coolant Temperature Sensors Parts Questions & Experts Answers

Sensor Assembly Temperature
22630AA140
Q:
Where is the Coolant Temperature Sensors Located and How to Replace it in a Subaru Legacy?
Posted by Raymon H.
A:
The ECT sensor is located beneath the rear right intake manifold runner, just above the rear right part of the engine block for non-turbocharged models from 2000 to 2004. It is screwed into the backside of the coolant passage that's bolted to the top of the block. Disconnect negative battery terminal cable. Partially drain engine coolant below sensor level. Remove air intake duct and air filter housing. Disconnect ECT sensor electrical connector. Unscrew ECT sensor from coolant passage.Remove and replace.Authors must wrap Teflon tape around threads to prevent leakage of coolant at threads.Installation is just like removal.Fill cooling system back up with antifreeze.The ECT sensor on turbocharged models and 2005+ non-turbocharged models is situated under alternator, ontop of the engine block. Disconnect negative battery terminal cable.A portion of coolant should be drained to keep it lower than this sensors.The Engine Cover should be removed in Legacy and Outback Turbo Charged Models (from 2005) as well as Foresters (from 2006). Remove alternator if fitted.Disengage the electrical connector attached to this sensor.Unscrew out ECT Sensor.After removing it again, I must use Teflon tape around its thread points so that no more coolant comes out during installation.This step will reverse what has been done before.Refilling of cooling system should be done afterwards.
Answered by Subaru Parts Specialist Diego / Oct 31, 2025

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