Common-failure cooling parts for the Wrangler JK (2007–2018). Each page lists the current Mopar number, what it supersedes, aftermarket equivalents, failure symptoms and whether to rebuild or replace, with a source for every number.
| Part | Mopar # | Fits |
|---|---|---|
| Thermostat Housing Assembly (3.6 Pentastar) | 5184651AJ | 2012–2017 Wrangler and 2018 Wrangler JK with the 3.6 Pentastar. Not the 3.8 (2007–2011) and not the JL. |
| Water Pump (JK 3.6 Pentastar) | 68079412AE | 2012–2017 Wrangler and 2018 Wrangler JK with the 3.6 Pentastar, per Mopar dealer catalogs. Not the 2007–2011... |