Summary: An electronic limited-slip differential (eLSD) has its own control unit, and that ECU decides how torque is shared across the driven axle for traction. As the unit ages its electronics can develop faults, and the signs are a differential or traction warning light, power that arrives unevenly or grip that drops away, and a stored eLSD fault code. eLSD ECU repair deals with that control unit, not the mechanical differential it governs. Your garage, wherever it is in the UK, takes the ECU out and puts it in the post to us. The ECU we receive is the ECU we repair and send home, and its lifetime warranty puts no limit on mileage. The Audi Q3 repair is priced on its listing below.
- Control unit, not gears: the ECU’s electronics are what this listing repairs; the differential itself stays on the car.
- Diagnosed, then proved: we find the fault, repair the unit in-house and test it fully before it travels back.
- Audi Q3 owners: yours is the single eLSD ECU listed on this page.
On a Volvo with ELSD, a Differential Electronic Module (DEM) regulates the system, and a faulty one can make traction control erratic; our Volvo ELSD DEM repairs page covers it.
Any other make: send the vehicle details and its traction symptoms through our repair form, and our answer explains how the unit gets to us.
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