Our coolant overflow bottles are some of the highest quality replacements on the market!

This radiator coolant overflow tank has been designed to replace the original design.


  • Direct replacement for originals that are cracked or broken
  • Replaces dealer part numbers: 17 11 1 712 835, 17111712835
  • Strengthened and redesigned in the vulnerable areas of failure
  • Plastic construction
  • Commonly called Expansion Tank by BMW
  • Fits E30, E34, E36, & Z3 body chassis as listed
  • Does not include cap or coolant lever sensor
  • Buyer will need to reuse original cap & Sensor

Now you can buy a high quality coolant reservoir that is built to strict quality control standards. REPLACE your broken or cracked one now with this great fitting Radiator Overflow Bottle.

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.

There are no reviews for this item. Write Review
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!

Vehicle Fit

Year Make Model Description
1992-1998BMW 318i BMW 318i E36 Radiator Coolant Overflow Tank
1991-1992BMW 318iC BMW 318iC E30 Radiator Coolant Overflow Tank
1994-1997BMW 318iC BMW 318iC E36 Radiator Coolant Overflow Tank
1992-1997BMW 318iS BMW 318iS E30 Radiator Coolant Overflow Tank
1995-1999BMW 318ti BMW 318ti E36 Radiator Coolant Overflow Tank
1989-1995BMW 525i BMW 525i Radiator Coolant Overflow Tank
1993-1995BMW 525iT BMW 525iT Radiator Coolant Overflow Tank
1996-1998BMW Z3 BMW Z3 Radiator Coolant Overflow Tank L4 1.9L

This part replaces:

  • OE # 17111712835
Part #: 1AROB00025

Out of Stock