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Thermostat

Thermostats are an important part present under the hood of your Mazda that operate alongside other cooling system parts. Thermostats adjust the flow of coolant that gets through to the radiator. It does this by opening and closing as needed to send or prevent coolant from getting through. Coolant helps prevent overheating and contributes to the proper working of the engine. Thermostats can get damaged over time and get stuck in an open or closed position, which can cause major issues. Changing your thermostat when you notice issues will ensure your engine continues to operate properly. Recognizing the symptoms of a failing thermostat is important to catch problems early. The issues will vary depending on the core problem. For instance, you may notice various temperature reads which are inaccurate or unpredictable. Improper reads such as excessively high or low also indicate problems with the thermostat (unless there are other underlying issues such as with the radiator). In some cases, this may cause starting issues with your vehicle. Replace your thermostat with an OEM part if you need to change it out. Aftermarket components may cause issues including erroneous temperature reads during travel. For Mazda OEM thermostat replacement parts and related components, you can visit our online store.

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Thermostat
Part Number: 8AF1-15-171-9U
Other Names: Thermostat Set More Names
Replaces: 8AF1-15-171, 8AF1-15-171-PT
Description: Rx7. More Info
Fits:
  • Mazda:
    • RX-7
$21.82
$15.58
$21.82
$15.58
Thermostat
Part Number: 8AH1-15-171B-9U
Other Names: Thermostat Set More Names
Replaces: 8AH1-15-171, 8AH1-15-171A, 8AH1-15-171B, 8AL1-15-171
Description: 3.0l. 929. MPV. More Info
Fits:
  • Mazda:
    • 929,
    • MPV
$29.93
$21.36
$29.93
$21.36
Thermostat
Part Number: GY01-15-171
Other Names: Thermostat No Gasket More Names
Replaces: AJ03-15-17X, AJ51-15-17X
Description: Tribute. 2002-06. 2000-01. 3.0L. MPV. More Info
Notes: Included With Thermostat Unit. More Notes
Fits:
  • Mazda:
    • 6,
    • MPV,
    • Tribute
$22.25
$15.89
$22.25
$15.89
Thermostat
Part Number: 8BU1-15-171
Other Names: Thermostat Set More Names
Description: B2600. More Info
Fits:
  • Mazda:
    • B2600
$20.88
$14.90
$20.88
$14.90
Thermostat
Part Number: B3H8-15-171A
Other Names: Thermostat Set More Names
Description: B2000. GLC. More Info
Fits:
  • Mazda:
    • B2000,
    • GLC
$22.48
$16.04
$22.48
$16.04
Thermostat Housing
Part Number: B6BF-15-172
Other Names: Water Outlet, Cover Thermostat More Names
Description: Protege. 1.6l. More Info
Fits:
  • Mazda:
    • Protege
$27.71
$19.78
$27.71
$19.78
Thermostat Housing
Part Number: CA60-15-170A
Other Names: Thermostat Unit, Cover Thermo More Names
Replaces: CA20-15-170, CA20-15-170A, CA68-15-170
Description: From 6/12/08. CX-9. More Info
Notes: Includes Thermostat And Gasket. More Notes
Fits:
  • Mazda:
    • CX-9
$333.79
$226.27
$333.79
$226.27
Thermostat Housing
Part Number: F201-15-172B
Other Names: Engine Coolant Thermostat Housing, Cover Thermo More Names
Description: 626, MX-6. Manual trans. Without turbo. More Info
Fits:
  • Mazda:
    • 626,
    • MX-6
$25.96
$18.53
$25.96
$18.53
Thermostatic Switch
Part Number: FD01-61-J20
Other Names: Thermostat, Thermostat Nla More Names
Description: RX-7. R12. Rx7. Mana. Dealer installed. More Info
Notes: Parts & Prices For Estimating Only. More Notes
Fits:
  • Mazda:
    • RX-7
$105.96
$72.46
$105.96
$72.46
Thermostat Housing
Part Number: G601-15-170
Positions: Lower
Other Names: Engine Coolant Thermostat Housing, Outlet Water More Names
Description: 2.6l. More Info
Fits:
  • Mazda:
    • B2600,
    • MPV
$81.20
$56.99
$81.20
$56.99
Thermostat Housing
Part Number: JF01-15-172A
Positions: Lower
Other Names: Thermostat Cover, Cover Thermo More Names
Description: 6 cylinder. 3.0l. 929. MPV. Sohc. Lower. More Info
Fits:
  • Mazda:
    • 929,
    • MPV
$30.13
$21.52
$30.13
$21.52
Thermostat Cover
Part Number: KJ01-15-172A
Other Names: Thermostat Housing, Cover Thermo More Names
Description: Millenia. 2.3L. More Info
Fits:
  • Mazda:
    • Millenia
$30.84
$22.02
$30.84
$22.02
Thermostat Housing
Part Number: KL01-15-172
Positions: Front
Other Names: Thermostat Cover, Cover Thermo More Names
Description: 2.5L, front. Millenia. 626, MX-6. 6 cyl. MX-3. All. 1.8l. Without turbo. More Info
Fits:
  • Mazda:
    • 626,
    • Millenia,
    • MX-3,
    • MX-6
$27.23
$19.44
$27.23
$19.44
Thermostat Housing
Part Number: KL47-15-170C
Positions: Rear
Other Names: Cover Thermostat More Names
Replaces: KL47-15-170, KL47-15-170B, KL61-15-540
Description: 2.5L, rear. More Info
Fits:
  • Mazda:
    • Millenia
$127.81
$87.40
$127.81
$87.40
Thermostat Housing
Part Number: N3A2-15-170A
Other Names: Thermostat Cover More Names
Replaces: N3A2-15-170
Description: Auto trans. More Info
Fits:
  • Mazda:
    • RX-7
$99.50
$69.84
$99.50
$69.84
Thermostat Cover
Part Number: P51B-15-172A
Other Names: Cover, Cover Thermostat More Names
Description: Miata mx5. More Info
Fits:
  • Mazda:
    • MX-5 Miata
$39.63
$28.29
$39.63
$28.29
Thermostat Outlet
Part Number: PY8W-15-172
Positions: Upper
Other Names: Water Outlet, Engine Coolant Thermostat Housing, Cover Thermostat More Names
Description: 2.5L turbo. Mazda6. More Info
Fits:
  • Mazda:
    • 6,
    • CX-5,
    • CX-9
$27.91
$19.92
$27.91
$19.92
Thermostat Unit
Part Number: ZZJ1-15-172
Other Names: Thermostat Housing, Cover Thermo More Names
Replaces: CA01-15-170A, CA69-15-170
Description: 3.7L, 2009-2010. 3.7L, 2011-13. Mazda6. More Info
Notes: Includes Water Outlet, Thermostat And Gasket. More Notes
Fits:
  • Mazda:
    • 6
$328.00
$222.34
$328.00
$222.34
Thermostat Housing
Part Number: LF70-15-170
Other Names: Thermostat Unit, Cover W Thermostat More Names
Replaces: LF50-15-170, LF50-15-170A, LF50-15-170B, LF50-15-170C, LF50-15-171, LF53-15-170, LF53-15-170A, LF53-15-170B, LFE5-15-170
Description: 2.0L without skyactiv. From 9/1/06. Miata mx5. To 3/8/06. Mazda3. Mazda5. Without mazdaspeed. Without skyactiv-g engine. More Info
Notes: Includes Thermostat And Gasket. More Notes
Fits:
  • Mazda:
    • 3,
    • 5,
    • MX-5 Miata
$65.68
$46.10
$65.68
$46.10
Thermostat Cover
Part Number: ZZC4-15-172
Other Names: Cover, Cover Thermostat More Names
Description: Tribute. 3.0L. Thermostat cover. More Info
Notes: Included With Water Pump Assembly. More Notes
Fits:
  • Mazda:
    • Tribute
$56.83
$39.89
$56.83
$39.89
Thermostat Gasket
Part Number: 9XB0-68-07S
Other Names: Engine Coolant Thermostat Gasket, Gasket, Thermostat O-Ring, O-Ring Thermostat More Names
Description: 2000-01. Mazda6. CX-9. 3.0l. MPV. O-Ring. More Info
Notes: Included With Thermostat Unit. More Notes
Fits:
  • Mazda:
    • 6,
    • CX-9,
    • MPV,
    • Tribute
$6.85
$4.97
$6.85
$4.97
Thermostat Housing
Part Number: G601-15-172A
Positions: Upper
Other Names: Thermostat Cover, Engine Coolant Thermostat Housing, Cover Thermo More Names
Replaces: G601-15-172
Description: B2600. 4 cylinder. More Info
Fits:
  • Mazda:
    • B2600,
    • MPV
$27.80
$19.85
$27.80
$19.85
Thermostat Cover
Part Number: JE96-15-172B
Positions: Lower
Other Names: Thermostat Housing, Cover Thermo More Names
Description: MPV. Lower. More Info
Fits:
  • Mazda:
    • MPV
$30.39
$21.69
$30.39
$21.69
Thermostat Housing
Part Number: N3A1-15-170A
Other Names: Thermostat Cover More Names
Description: Manual trans. More Info
Fits:
  • Mazda:
    • RX-7
$114.04
$77.99
$114.04
$77.99
Thermostat Housing
Part Number: N3H1-15-1H0D
Other Names: Case Thermostat More Names
Replaces: N3H1-15-1H0C
Description: From 12/1/04. RX-8. More Info
Fits:
  • Mazda:
    • RX-8
$147.68
$100.99
$147.68
$100.99
Thermostat Housing
Part Number: YF09-15-176B
Other Names: Case Thermostat More Names
Replaces: YF09-15-176, YF09-15-176A
Description: Tribute. 2.0L. More Info
Fits:
  • Mazda:
    • Tribute
$53.65
$37.65
$53.65
$37.65
Thermostat Housing
Part Number: ZZM2-15-172
Other Names: Engine Coolant Thermostat Housing, Cover Thermostat More Names
Description: 4.0L, 1998-2000. B4000. More Info
Fits:
  • Mazda:
    • B4000
$238.02
$162.77
$238.02
$162.77
Thermostat Cover
Part Number: 1F82-15-172
Other Names: Thermostat Housing, Cover Thermostat More Names
Replaces: 1F25-15-172, 1F72-15-172
Description: 4.0L, 2001-09. B4000. More Info
Fits:
  • Mazda:
    • B4000
$18.58
$13.49
$18.58
$13.49
Thermostat Cover
Part Number: AJ03-15-172C
Other Names: Thermostat Housing, Water Outlet, Cover, Cover Thermostat More Names
Replaces: AJ03-15-172, AJ03-15-172A, AJ03-15-172B
Description: Tribute. 2002-06. Mazda6. 3.0L. MPV. Thermostat cover. More Info
Notes: Included With Thermostat Unit. More Notes
Fits:
  • Mazda:
    • 6,
    • MPV,
    • Tribute
$31.04
$22.16
$31.04
$22.16
Thermostatic Switch
Part Number: BJ6B-61-J25
Other Names: Thermostat, Amplifier Thermo More Names
Replaces: GE4T-61-J25
Description: Protege. More Info
Notes: Included With Evaporator Assembly. More Notes
Fits:
  • Mazda:
    • Protege,
    • Protege5
$60.22
$42.26
$60.22
$42.26
Thermostat Housing
Part Number: BP6D-15-170A
Positions: Lower
Other Names: Cover Thermostat More Names
Description: Miata mx5. Lower. More Info
Fits:
  • Mazda:
    • Miata
$76.24
$53.50
$76.24
$53.50
Thermostat Unit
Part Number: CY01-15-170A
Other Names: Thermostat Housing, Cover Thermostat More Names
Replaces: CY01-15-170, ZZJ1-15-17X, ZZJ1-15-17XA
Description: To 6/12/08. CX-9. More Info
Notes: Includes Thermostat And Gasket. More Notes
Fits:
  • Mazda:
    • CX-9
$596.06
$400.47
$596.06
$400.47
Thermostat Housing
Part Number: F202-15-172B
Other Names: Engine Coolant Thermostat Housing, Cover Thermo More Names
Description: 626, MX-6. Auto trans. Without turbo. More Info
Fits:
  • Mazda:
    • 626,
    • MX-6
$25.96
$18.53
$25.96
$18.53
Thermostat Unit
Part Number: L336-15-170
Other Names: Thermostat, Thermostat Housing, Water Inlet, Cover, Thermostat Cover More Names
Replaces: L327-15-170, L327-15-170A, L327-15-171, L328-15-170A, L328-15-170B, LFE2-15-170, ZZCA-15-172, ZZCA-15-172A
Description: From 3/8/06 to 9/1/06. 2.5L, 2009-2010. 2.5L, 2011-13. Tribute hev. Mazdaspeed3. Miata mx5. Mazda6. Mazda5. Mazda3. 2.3L. CX-7. With... More Info
Notes: Includes Thermostat Gasket And Water Inlet. More Notes
Fits:
  • Mazda:
    • 3,
    • 5,
    • 6,
    • CX-7,
    • MX-5 Miata,
    • Tribute
  • 1 more
$43.28
$30.89
$43.28
$30.89
Thermostat Housing
Part Number: 1F73-15-172
Other Names: Thermostat Cover More Names
Replaces: 1F22-15-172, 1F22-15-172A
Description: 4.0L, 2001-09. More Info
Fits:
  • Mazda:
    • B4000
$38.31
$27.35
$38.31
$27.35
Thermostat Housing
Part Number: 1F81-15-172
Other Names: Cover Thermostat More Names
Replaces: 1F61-15-172
Description: B3000. 3.0L. More Info
Fits:
  • Mazda:
    • B3000
$22.55
$16.10
$22.55
$16.10
Thermostat Housing
Part Number: B597-15-172
Other Names: Cover Thermostat More Names
Description: MX-3. 1.6l. More Info
Fits:
  • Mazda:
    • MX-3
$26.32
$18.79
$26.32
$18.79
Thermostat Housing
Part Number: BPE8-15-172
Positions: Upper
Other Names: Thermostat Cover, Cover Thermostat More Names
Description: Miata mx5. Upper. More Info
Fits:
  • Mazda:
    • Miata
$30.34
$21.66
$30.34
$21.66
Thermostat Housing
Part Number: FS05-15-172
Other Names: Thermostat Cover, Cover Thermo More Names
Description: 626, MX-6. 2.0L. All. 4 cyl. Without turbo. More Info
Fits:
  • Mazda:
    • 626,
    • MX-6
$30.17
$21.54
$30.17
$21.54
Thermostat Housing
Part Number: FS05-15-176A
Positions: Lower
Other Names: Engine Coolant Thermostat Housing, Case, Case Thermo More Names
Replaces: FS05-15-176
Description: 1.8l, 2.0l. Protege. More Info
Fits:
  • Mazda:
    • 626,
    • MX-6,
    • Protege,
    • Protege5
$59.65
$41.86
$59.65
$41.86
Thermostat Case
Part Number: JE96-15-176
Positions: Upper
Other Names: Thermostat Housing, Case Thermostat More Names
Description: MPV. Upper. More Info
Fits:
  • Mazda:
    • MPV
$47.32
$33.78
$47.32
$33.78
Thermostat Housing
Part Number: KJ01-15-170
Other Names: Case Thermostat More Names
Description: 2.3L. More Info
Fits:
  • Mazda:
    • Millenia
$140.97
$96.40
$140.97
$96.40
Thermostat Housing
Part Number: N3H1-15-1H0B
Other Names: Case Thermostat More Names
Replaces: N3H1-15-1H0A, N3H1-15-1H0B-PT
Description: To 12/1/04. RX-8. More Info
Fits:
  • Mazda:
    • RX-8
$150.56
$102.96
$150.56
$102.96
Thermostat Housing
Part Number: P502-15-17ZA
Positions: Lower
Other Names: Water Outlet, Engine Coolant Thermostat Housing, Outlet Water More Names
Replaces: PEAR-15-17Z
Description: 2.0L, auto trans. 2.5L, auto trans. From 02/01/2014. 2016-18. Mazda3. CX-5. CX-3. Without turbo. More Info
Fits:
  • Mazda:
    • 3,
    • 6,
    • CX-3,
    • CX-5
$80.63
$56.59
$80.63
$56.59
Engine Coolant Thermostat
Part Number: 8ABB-15-171-9U
Other Names: Thermostat, Thermostat Set More Names
Replaces: 8ABB-15-171
Description: 626 & MX-6. B2200. B2000. Gas. More Info
Fits:
  • Mazda:
    • 626,
    • B2000,
    • B2200,
    • MX-6
$21.93
$15.65
$21.93
$15.65
Engine Coolant Thermostat
Part Number: KL01-15-171A-9U
Other Names: Thermostat, Thermostat ( W Gasket ) More Names
Replaces: 8AGX-15-171, 8AK2-15-171, FS05-15-171, KL01-15-171, KL01-15-171A
Description: 6 cylinder. 1.8l, 2.0l. 626, MX-6. Millenia. Protege. Mazda2. 2.5L. 2.3L. MX-3. MPV. 4 cylinder. Auto trans. Incl.Gasket. More Info
Fits:
  • Mazda:
    • 2,
    • 626,
    • CX-5,
    • Millenia,
    • MPV,
    • MX-3,
    • MX-6,
    • Protege,
    • Protege5
  • 4 more
$25.09
$17.91
$25.09
$17.91
Thermostat Housing Gasket
Part Number: ZZP0-15-173
Other Names: Thermostat Gasket, Gasket Thermostat Cover More Names
Description: B2500. 3.0L. 2.5L. More Info
Fits:
  • Mazda:
    • B2500,
    • B3000
$13.55
$9.84
$13.55
$9.84
Engine Coolant Thermostat
Part Number: P501-15-171
Other Names: Thermostat More Names
Description: To 08/04/2015. Mazda3. Mexico built. More Info
Fits:
  • Mazda:
    • 3,
    • MX-5 Miata
$27.71
$19.78
$27.71
$19.78
Thermostat Unit Gasket
Part Number: ZZJ1-15-592
Other Names: Thermostat O-Ring, Housing Gasket, Ring O -Water Outlet More Names
Replaces: CA19-15-174, CA60-15-174
Description: Mazda6. More Info
Notes: Included With Thermostat Unit. More Notes
Fits:
  • Mazda:
    • 6,
    • CX-9
$10.73
$7.79
$10.73
$7.79
Engine Coolant Thermostat
Part Number: 8AK1-15-171-9U
Other Names: Thermostat, Thermostat ( W O Gasket ) More Names
Replaces: 8AK1-15-171, 8AN1-15-171, F201-15-171, F201-15-171A
Description: To 02/01/1991. 323 & Protege. Miata mx5. 626 & MX-6. MX-3. 1.6l. Incl.Gasket. More Info
Fits:
  • Mazda:
    • 323,
    • 626,
    • B2600,
    • Miata,
    • MPV,
    • MX-3,
    • MX-6,
    • Protege
  • 3 more
$21.89
$15.62
$21.89
$15.62

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