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.

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. Please keep your invoice for proof of this warranty.

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Vehicle Fit

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

This part replaces:

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

Ships Same Day for orders placed by 4 P.M. ET