Chassis, generic

C0853 Active Damping Control Rear Right

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0853 is undocumented in public sources; no carmaker's list, bulletin or manual mentions it. The title is about the adjustable damper at the right rear. Such dampers only work as well as the inputs behind them: the control unit takes in body and wheel motion from accelerometers and sets each valve accordingly. BMW reprogrammed the variable damper control of X6 (F16) cars built in late 2014 because tolerance spread in the wheel accelerometers made it shut electronic damping off and leave the car on a conventional setting. For the actuator itself, GM's 2011 Saab models (9-5, 9-4X) use C0590 for this corner, and Stellantis uses C15C8 and C15C9 on the Ram 1500 from 2024. A failed rear right channel makes the car ride on fixed damping and shows a suspension warning.

Likely causes

Open or shorted circuit to the right rear damper valve
Implausible wheel acceleration sensor input causing shutdown (BMW SI B37 01 14)
Damper control unit software needing an update

Symptoms

  • Suspension fault message
  • Car stays on a fixed damper setting regardless of mode

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,800
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

active damper rrdamper solenoidsuspension control module

Related codes

C0850C0851C0852C0920

References: static.nhtsa.gov, saabwisonline.com, static.nhtsa.gov.