The Best Acura Thermostats

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While the original thermostat in your Acura may only be responsible for doing one thing, it does that one thing quite well. It's responsible for keeping your engine at the right temperature, by reacting to any temperature changes in your engine coolant.

How Your Thermostat Works

There's a unique wax on the thermostat that expands when the engine gets too warm. When the coolant is cool, the thermostat stays closed and keeps coolant running through the engine If it detects that the coolant is hot, the thermostat opens up to allow the heated liquid to exit and works its way to the radiator to get cooled back down.

How to Spot a Failing Thermostat

Thermostats are quite durable, but even the best can go bad. Here are some signs to look for:

  • Your engine keeps overheating
  • You notice your engine is running less efficiently
  • You have problems with your AC and heating
  • The "Check Engine" light kicks on

It's important to act quickly if your thermostat is having trouble operating properly, or else you may begin having significant engine problems. Switch the old one out for a new thermostat that's designed to work with your model's engine: a genuine Acura one. Order online from our auto parts counter and relax secure in the knowledge that your solution is on its way. Buy now and save!

Thermostat Assembly (Nippon Thermostat)
Part Number: 19301-PNA-003
Other Names: Thermostat Assembly More Names
Fits:
  • Acura:
    • RSX
MSRP $90.36
$63.97
MSRP $90.36
$63.97
Thermostat Assembly (Nippon Thermostat)
Part Number: 19301-RAF-004
Other Names: Thermostat Assembly More Names
Replaces: 19301-RAF-003
Fits:
  • Acura:
    • ILX,
    • TSX
MSRP $90.36
$63.97
MSRP $90.36
$63.97
Thermostat Assembly (Nippon Thermostat)
Part Number: 19301-RP3-305
Other Names: Thermostat Assembly More Names
Fits:
  • Acura:
    • ILX
MSRP $54.51
$39.24
MSRP $54.51
$39.24
Thermostat Assembly (Nippon Thermostat)
Part Number: 19301-P8E-A10
Other Names: Thermostat Assembly More Names
Replaces: 19300-PR7-A01, 19300-PR7-A02, 19301-PR7-305, 19301-PR7-306, 19301-PR7-307, 19301-PR7-A00, 19301-PR7-A01
Fits:
  • Acura:
    • CL,
    • Legend,
    • MDX,
    • NSX,
    • RL,
    • TL,
    • TSX,
    • ZDX
  • 3 more
MSRP $70.78
$50.96
MSRP $70.78
$50.96
Case, Thermostat (Nippon Thermostat)
Part Number: 19320-RAA-A02
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • TSX
MSRP $66.55
$47.92
MSRP $66.55
$47.92
Thermostat Assembly (Nippon Thermostat)
Part Number: 19301-PAA-306
Other Names: Thermostat Assembly More Names
Replaces: 19300-P08-003, 19300-PH7-004, 19300-PH7-014, 19300-PH7-024, 19300-PL2-004, 19300-PR3-003, 19300-PR3-004, 19300-PT0-003, 19300-PT0-004, 19301-P08-000, 19301-P08-305, 19301-P08-306, 19301-P08-315, 19301-P08-316, 19301-P10-307
Fits:
  • Acura:
    • CL,
    • Integra,
    • Legend
MSRP $44.41
$33.30
MSRP $44.41
$33.30
Case, Thermostat (Nippon Thermostat)
Part Number: 19320-R40-A01
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • TSX
MSRP $68.43
$49.27
MSRP $68.43
$49.27
Thermostat Assembly (Nippon Thermostat)
Part Number: 19301-R40-A02
Other Names: Thermostat Assembly More Names
Fits:
  • Acura:
    • TSX
MSRP $76.05
$54.74
MSRP $76.05
$54.74
Case, Thermostat (Nippon Thermostat)
Part Number: 19320-PNA-003
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • RSX
MSRP $69.59
$50.10
MSRP $69.59
$50.10
Grommet, Thermostat
Part Number: 80282-SM4-A00
Other Names: Grommet Thermostat More Names
Fits:
  • Acura:
    • Integra
MSRP $3.15
$2.36
MSRP $3.15
$2.36
Cover, Thermostat
Part Number: 19311-R70-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • MDX,
    • RDX,
    • RL,
    • TL,
    • TSX,
    • ZDX
  • 1 more
MSRP $23.08
$17.31
MSRP $23.08
$17.31
Cover, Thermostat
Part Number: 19311-RW0-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • ILX
MSRP $17.47
$13.10
MSRP $17.47
$13.10
Case, Thermostat
Part Number: 19320-RW0-A00
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • ILX
MSRP $81.84
$58.92
MSRP $81.84
$58.92
Case, Thermostat
Part Number: 19320-RWC-A00
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • RDX
MSRP $83.54
$59.14
MSRP $83.54
$59.14
Case, Thermostat
Part Number: 19321-6B2-A52
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • RDX
MSRP $94.96
$67.24
MSRP $94.96
$67.24
Cover, Thermostat
Part Number: 19311-58G-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • NSX
MSRP $333.80
$228.32
MSRP $333.80
$228.32
Cover, Thermostat
Part Number: 19311-P0A-010
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • CL
MSRP $48.57
$36.43
MSRP $48.57
$36.43
Cover, Thermostat
Part Number: 19311-P2T-000
Other Names: Cover Thermostat More Names
Replaces: 19311-P30-000
Fits:
  • Acura:
    • Integra
MSRP $23.67
$17.75
MSRP $23.67
$17.75
Case, Thermostat
Part Number: 19320-R1A-A00
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • ILX
MSRP $59.93
$43.15
MSRP $59.93
$43.15
Case, Thermostat
Part Number: 19321-5A2-A01
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • TLX
MSRP $107.80
$76.32
MSRP $107.80
$76.32
Thermostat, A/C
Part Number: 8-97223-415-0
Other Names: Thermostat A C More Names
Replaces: 8-97170-805-0
Fits:
  • Acura:
    • SLX
MSRP $79.62
$57.32
MSRP $79.62
$57.32
Cover, Thermostat
Part Number: 19311-PR7-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • NSX
MSRP $42.63
$31.98
MSRP $42.63
$31.98
Case, Thermostat
Part Number: 19320-58G-A00
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • NSX
MSRP $552.45
$374.56
MSRP $552.45
$374.56
Case, Thermostat
Part Number: 19320-P30-J00
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • Integra
MSRP $79.36
$57.13
MSRP $79.36
$57.13
Cover, Thermostat
Part Number: 19311-P8A-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • CL,
    • MDX,
    • TL
MSRP $105.49
$74.68
MSRP $105.49
$74.68
Cover, Thermostat
Part Number: 19311-R1A-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • ILX
MSRP $17.75
$13.31
MSRP $17.75
$13.31
Cover, Thermostat
Part Number: 19311-RCA-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • MDX,
    • TL
MSRP $18.83
$14.13
MSRP $18.83
$14.13
Cover, Thermostat
Part Number: 19311-RJA-A00
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • RL
MSRP $38.49
$28.86
MSRP $38.49
$28.86
Case, Thermostat
Part Number: 19320-P0A-010
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • CL
MSRP $69.43
$49.99
MSRP $69.43
$49.99
Case, Thermostat
Part Number: 19321-R4H-A00
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • ILX
MSRP $116.55
$82.52
MSRP $116.55
$82.52
Cover Assembly, Thermostat (Nippon Thermostat)
Part Number: 19310-5A2-A02
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • ILX,
    • TLX
MSRP $69.08
$49.73
MSRP $69.08
$49.73
Cover Assembly, Thermostat
Part Number: 19310-5MS-H01
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • RDX
MSRP $53.81
$38.74
MSRP $53.81
$38.74
Cover Assembly, Thermostat
Part Number: 19315-58K-H01
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • MDX,
    • RDX
MSRP $51.21
$36.86
MSRP $51.21
$36.86
Cover Assembly, Thermostat
Part Number: 19315-5G2-A01
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • RLX
MSRP $53.30
$38.38
MSRP $53.30
$38.38
Cover Assembly, Thermostat
Part Number: 19315-R9P-A01
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • MDX,
    • RLX
MSRP $51.07
$36.77
MSRP $51.07
$36.77
Cover Assembly, Thermostat
Part Number: 19315-5J2-A01
Other Names: Cover Thermostat More Names
Fits:
  • Acura:
    • MDX,
    • RLX,
    • TLX
MSRP $50.32
$36.23
MSRP $50.32
$36.23
Thermostat Assembly (Fuji Seiko)
Part Number: 19301-RTA-003
Other Names: Thermostat Assembly More Names
Fits:
  • Acura:
    • RDX
MSRP $80.94
$58.27
MSRP $80.94
$58.27
Case, Thermostat (Fuji Seiko)
Part Number: 19320-RAA-A01
Other Names: Case Thermostat More Names
Fits:
  • Acura:
    • ILX,
    • TSX
MSRP $66.55
$47.92
MSRP $66.55
$47.92
Thermostat Assembly (Fuji Seiko)
Part Number: 19301-R40-A01
Other Names: Thermostat Assembly More Names
Fits:
  • Acura:
    • TSX
MSRP $76.05
$54.74
MSRP $76.05
$54.74
Thermostat Assembly (Fuji Seiko)
Part Number: 19301-P8A-A00
Other Names: Thermostat Assembly More Names
Fits:
  • Acura:
    • CL
MSRP $47.28
$35.46
MSRP $47.28
$35.46
Thermostat Assembly (Fuji Seiko)
Part Number: 19301-RNA-315
Other Names: Thermostat Assembly More Names
Replaces: 19301-RNA-305, 19301-RNA-306
Fits:
  • Acura:
    • ILX
MSRP $56.78
$40.88
MSRP $56.78
$40.88
Thermostat
Part Number: 8-97362-894-0
Replaces: 8-97123-161-3, 8-97123-161-4
Fits:
  • Acura:
    • SLX
MSRP $36.96
$27.71
MSRP $36.96
$27.71
Thermostat
Part Number: 8-97032-508-0
Fits:
  • Acura:
    • SLX
MSRP $26.12
$19.59
MSRP $26.12
$19.59
Cover Thermostat
Part Number: 19311-6S9-A00
MSRP $22.83
$17.13
MSRP $22.83
$17.13
Thermostat Assembly
Part Number: 06193-6S9-305
MSRP $40.08
$30.05
MSRP $40.08
$30.05
Case Thermostat
Part Number: 19320-6S9-A00
MSRP $67.07
$48.29
MSRP $67.07
$48.29

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