2012 BMW 128i service and repair manual a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.
What's included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Wiring diagrams and electrical sections
- Powertrain, brakes, steering, suspension, HVAC and more
Trims covered
- Base Convertible 2-Door
- Base Coupe 2-Door
Engines covered
- 3.0L 2996CC l6 GAS DOHC Naturally Aspirated
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Hybrid & Electric Vehicle Systems
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Wiring Diagrams
BMW of North America, LLC (BMW) is recalling certain 2008-2013 128i and 135i Convertibles, 128i, 135i, and M Coupes, 2007-2010 X3 30si and X3 xDrive30i, 2013-2015 X1 sDrive28i, X1 xDrive28i and X1 xDr
An inflator explosion may result in sharp metal fragments striking the driver or other occupants res
BMW will notify owners, and dealers will replace the driver air bag. On X5 and X6 vehicles, only th
BMW is recalling certain model year 2008-2012 1-Series coupes and convertibles manufactured December 2007 through September 2011; and 2007-2011 3-Series coupes and convertibles manufactured March 2007
If there is a loss of electrical power to the vehicle, the vehicle may unexpectedly stall, increasin
BMW will notify owners, and dealers will replace the positive battery cable connector and secure it
BMW of North America, LLC (BMW) is recalling certain 2008-2012 BMW 128i, 135i, 135is Coupes and 128i, 135i Convertible vehicles. The wiring and electrical connectors in the blower-regulator wiring ha
Wiring that overheats could cause the electrical connectors to melt, and increase the risk of a fire
BMW will notify owners, and dealers will inspect the blower-regulator wiring harness, and replace it
BMW of North America, LLC (BMW) is recalling certain model year 2008-2013 128i and 135i coupes and convertibles and 1 Series M coupes, 2006-2011 325i, 325xi, 328i, 328xi, 328i xDrive, 330i, 330xi, 335
In the event of a crash necessitating deployment of the driver's frontal air bag, the inflator could
BMW will notify owners, and dealers will replace the driver's frontal air bag module or inflator dep
BMW of North America, LLC (BMW) is recalling certain 2008-2013 1 Series Coupe (128i); 2007-2013 3 Series Coupe (328i, 328xi, 328i xDrive); 2007-2010 X3 SAV (X3 3.0si, X3 xDrive30i); 2008-2013 1 Series
An electrical short can cause the PCV valve heater to overheat, increasing the risk of a fire while
This recall supersedes and expands previous NHTSA recalls 17V-683 and 19V-273. Dealers will install
While performing a 12-Volt battery jump start, disconnect, or replacement, Vehicle test, and/or Programming procedure- the BMW Footwell Module (FRM) may become unresponsive. As a result, one or more of the following vehicle electric system-
The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on ho
Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking from high speed with cold brake components (less than 212 degree
Power Reduction, FC2A82 Intake VANOS and/or FC2A87 Exhaust VANOS Camshaft Fault: The ?Service Engine Soon? (MIL) lamp is illuminated and engine power reduction is perceived. This situation can occur after driving for some time with the engi
Power Reduction FC2A82 Intake VANOS and/or FC2 A87 Exhaust VANOS Camshaft Fault: The "Service Engine Soon" (MIL) lamp is illuminated and engine power reduction is perceived. This situation can occur after driving for some time with the engi
BMW: OIL LEAKS FROM THE AIR HOSE ON TURBOCHARGER. THIS IS DESIGNATED FOR E70, AND E90 MODELS WITH M57Y DIESEL ENGINES. SERVICE ENGINE SOON LAMP MAY BE ILLUMINATED. *KB
BMW: CORRSION PROTECTION IS INSUFFICIENT ON THE OUTSIDE OF THE TRUNK AROUND THE BATTERY CONNECTOR WHICH COULD LEAD TO CORROSION OF THE BODY. *KB UPDATED 11/1/13. *PE
BMW: IF BSD COMMUNICATION IS DISRUPTED, OIL LEVEL SENSOR DATA IS NO LONGER RECEIVED BY DME. BSD COMMUNICATION FAULT(S), AFTER REPAIRS ARE SHORTLY SET, REQUIRES REMOVAL OF IGNITION HARNESS FROM CYLINDER HEAD COVER. ALL MODELS. NO MODEL YEARS
Showing the 8 most recent of 10 technical service bulletins on file with NHTSA.
TL* THE CONTACT OWNED A 2012 BMW 128I. WHILE DRIVING APPROXIMATELY 30 MPH AND MAKING A LEFT TURN INTO TRAFFIC, THE CONTACT CRASHED INTO ANOTHER VEHICLE. THE AIR BAGS DEPLOYED. AS A RESULT, METAL FRAGM
PULLING IN PARKING LOT TO PARK GOING AT A VERY LOW SPEED I HIT THE BRAKES AND THEY DID NOT HOLD INSTEAD THE CAR ACCELERATED AND JUMPED ON TO A SIDEWALK AND THEN INTO A BRICK WALL. I FINALLY WAS ABLE T
PULLING IN PARKING LOT TO PARK GOING AT A VERY LOW SPEED I HIT THE BRAKES AND THEY DID NOT HOLD INSTEAD THE CAR ACCELERATED AND JUMPED ON TO A SIDEWALK AND THEN INTO A BRICK WALL. I FINALLY WAS ABLE T
Showing the 3 most serious of 35 complaints filed with NHTSA.
