Our coolant overflow bottle caps are some of the highest quality replacements on the market! This radiator coolant overflow cap has been designed to replace the original design.


  • Radiator Overflow Bottle Cap
  • Replaces dealer part number: MJA4440BA
  • Plastic construction
  • Direct replacements
  • Built to strict quality control standards

Replace your missing or cracked cap now with this great fitting radiator overflow bottle cap.

Item Condition: New

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

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Vehicle Fit

Year Make Model Description
1998-2003Jaguar Vanden Plas Jaguar Vanden Plas Radiator Overflow Bottle Cap
2002-2007Jaguar X-Type Jaguar X-Type Radiator Overflow Bottle Cap
1998-2003Jaguar XJ8 Jaguar XJ8 Radiator Overflow Bottle Cap
1998-2003Jaguar XJR Jaguar XJR Radiator Overflow Bottle Cap
1997-2006Jaguar XK8 Jaguar XK8 Radiator Overflow Bottle Cap
2000-2006Jaguar XKR Jaguar XKR Radiator Overflow Bottle Cap

This part replaces:

  • OE # MJA4440BA
Only 2 left in stock
Part #: 1AROB00160

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout