Additional Images

Tensioner Stop for R53 Supercharged Engine


2 Hours

Part Number

WARNING: Cancer and Reproductive Harm

Was: $30.00
Sale: $25.50
Save: 15%
Save: $4.50


ALTA Tensioner Stop

Why do you need an ALTA Tensioner Stop?

At some point in your MINI's life, the serpentine belt that drives the Supercharger and AC, will fail. When it fails, the OEM belt tensioner mechanism plunges into the crank pulley, destroying the tensioner and crank pulley. The ALTA Tensioner Stop simply hooks around both ends of Tensioner dampener and limits the travel of the tensioner arm preventing damage when the belt fails. This simple and inexpensive part, saves you hundreds of dollars in repairs!

Unique design

The unique design of the ALTA Tensioner Stop allows you to install it quickly and easily, and still provides you zero chance of failure!

How it works

The ALTA Tensioner Stop hooks around both ends of the tensioner dampener and limits the travel of the tensioner arm. ALTA designed it to limit the travel of the tensioner to the same point as the OEM tensioner. Thus allowing unhindered travel and operation of the tensioner but only to the point at which the OEM tensioner stop fails.

Easy installation

Some designs require you to remove the OEM tensioner assembly from the car and completely unbolting the tensioner dampener to install. The ALTA Tensioner Stop is a breeze and simply requires the motor jacked up slightly, and allows the Tensioner assembly to be left in the vehicle. Saving you about 30 minutes of shop labor to install it!

5 Year Warranty

ALTA Performance warrants to the original purchaser, all ALTA products to be free from defects in material and workmanship within a sixty (60) months period from the date of purchase. *Some exclusions apply
» Read Full Warranty

Off Road Use Only

This product is legal in California only for racing vehicles which may never be used upon a highway. Check your local and federal laws prior to installation.
» Learn More


Download Instructions

Warranty Details

This product features a 5 year warranty Read Full Warranty

Tech Department



Demonstration Videos

ALTA Tentioner Stop

In The Box

In The Box

(1) Tensioner Stop

Compatibility Notes


2002-2006 Cooper S (R53) Yes
2004-2008 Cooper S Cabrio (R52) Yes
2002-2006 Cooper (R50) No
2002-2006 Cooper S Automatic (R53) Yes

This only fits Supercharged models.



Shipping Information

  • Item Requires Shipping
  • 1.0 lbs.
  • W3.0000” x H7.0000” x L8.0000”
  • This item ships in its own box.