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The ECU Pro offers affordable mail-in automotive repairs for your BMW 3-Series 320i. Typical repairs include ECU, DME, Keys, and immobilizer systems such as CAS, EWS, and FEM units. Our services are typically 50-70% cheaper than OEM repairs and come with a warranty and free technical support. Contact us today to get your electronic systems repaired on your BMW 3-Series 320i.