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1998 Porsche Boxster 986 Base Convertible H6 2.5L

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Your Vehicle 1998 Porsche Boxster 986 Base Convertible H6 2.5L
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1998 Porsche Boxster 986 Base Convertible H6 2.5L Engine Thermostat Parts

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Water Pump & Thermostat Kit

ES#3022391 - 99610601156KT1 - Water Pump & Thermostat Kit - Includes gaskets, coolant, and a new belt! - Assembled By ECS - Porsche

Includes gaskets, coolant, and a new belt! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Only for cars with air conditioning (I573 option code)

Brand:
Assembled By ECS - Corporate Logo
ES#:
3022391
Mfg#:
99610601156KT1
Back Ordered
$337.99

This product was last offered at the strikethrough price on
02-12-2026

$330.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Thermostat Insert

ES#3488331 - 99610612554 - Thermostat Insert - Located at the upper coolant cover under the aluminum lid - Genuine Porsche - Porsche

Located at the upper coolant cover under the aluminum lid affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Porsche - Corporate Logo
ES#:
3488331
Mfg#:
99610612554
Ships in 2 Business Days
$88.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Assembly

ES#4642684 - 99610601361 - Thermostat Assembly - 83C thermostat with housing and gasket - URO - Porsche

83C thermostat with housing and gasket affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4642684
Mfg#:
99610601361
Ships on Jun 30, 2026
$31.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gasket For Thermostat Cover

ES#4065877 - 99610632651 - Gasket For Thermostat Cover - Must be replaced any time your thermostat is removed - Genuine Porsche - Porsche

Must be replaced any time your thermostat is removed affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Porsche - Corporate Logo
ES#:
4065877
Mfg#:
99610632651
Ships in 3 Business Days
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Insert

ES#3022392 - 99610612553 - Thermostat Insert - 180F thermostat insert with installation tool - MotoRad - Porsche

180ºF thermostat insert with installation tool affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
MotoRad
ES#:
3022392
Mfg#:
99610612553
In Stock at Vendor
$22.99

This product was last offered at the strikethrough price on
02-14-2026

$16.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Gasket For Thermostat Cover

ES#2637144 - 99610632650 - Gasket For Thermostat Cover - One-time use - Victor Reinz - Porsche

One-time use affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Victor Reinz - Corporate Logo
ES#:
2637144
Mfg#:
99610632650
In Stock at Vendor
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Thermostat Parts

Your thermostat helps regulate engine temperatures by allowing the coolant to circulate through the radiator once it opens. If it fails, this might mean it never closes, but worst case, it could mean your coolant doesn't get to the radiator. Stay ahead of cooling issues by replacing your thermostat regularly with an OEM thermostat or quality aftermarket thermostat from our selection.

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Manufacturer names and/or part numbers are used only for identification purposes.

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