Subaru Impreza Quiz
Instruments and controls

Rear differential oil temperature warning light (STI)

In this manual: Instruments and controls
Foreword — 1Warranties — 5How to use this Owner’s Manual — 5Vehicle symbols — 1Safety precautions when driving — 14Illustrated index — 7Function settings — 1Seat, seatbelt and SRS airbags — 75Keys and doors — 66Instruments and controls — 121Climate control — 42Audio — 168Interior equipment — 29Starting and operating — 111Driving tips — 31In case of emergency — 21Appearance care — 16Maintenance and service — 109Specifications — 21Consumer information and Reporting safety defects — 31
~1min read
Reduce vehicle speed and park the vehicle in a safe place as soon as possible if the R.DIFF TEMP light illuminates. Continued driving with this light illuminated can damage the rear differential and other parts of the powertrain.

Reduce vehicle speed and park the vehicle in a safe place as soon as possible if the R.DIFF TEMP light illuminates. Continued driving with this light illuminated can damage the rear differential and other parts of the powertrain.

If this light illuminates when the engine is running, it may indicate that the rear differential oil temperature is too hot.

At this time, the driver’s control center differential will automatically cancel the current torque-distribution ratio setting and adopt its minimum ratio.

If the light illuminates while driving, reduce vehicle speed and stop the vehicle at the nearest safe place. Park the vehicle for several minutes. After the light turns off, you can start driving.

If the light does not turn off, contact the nearest SUBARU dealer for service.

• The rear differential oil will deteriorate if its temperature increases enough for the rear differential oil temperature warning light to illuminate. It is advisable to have the rear differential oil replaced as soon as possible.

Test yourself

A quick Subaru Impreza quiz: every answer comes with an explanation and a link to the manual page.