2012 Bmw 135i Maintenance Schedule
Manufacturer-recommended service intervals for the Condition-Based Service and open recall alerts for your 2012 Bmw 135i.
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How BMW schedules service: Condition-Based Service
BMW vehicles use Condition-Based Service (CBS) — the dashboard shows each service item with its own remaining mileage and time, calculated by sensors. The schedule below shows BMW's underlying targets. BMW Ultimate Care covers the first 3 years / 36,000 miles of factory-scheduled maintenance on most new vehicles.
6 Open Recalls
Source: NHTSAELECTRICAL SYSTEM:WIRING
Campaign #19V579000 · 06/08/2019
ELECTRICAL SYSTEM:WIRING
Campaign #19V579000 · 06/08/2019
Issue: 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 harness may overheat.
Risk: Wiring that overheats could cause the electrical connectors to melt, and increase the risk of a fire, even when the vehicle is unattended.
Fix: BMW will notify owners, and dealers will inspect the blower-regulator wiring harness, and replace it with a new part, free of charge. The recall began October 4, 2019. Owners may contact BMW customer service at 1-800-525-7417. Note: This recall is an expansion of an earlier recall number 17V-676.
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
Campaign #20V017000 · 15/01/2020
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
Campaign #20V017000 · 15/01/2020
Issue: 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 xDrive35i, 2007-2013 328i, 328i xDrive, 335i, 335is, 335i xDrive and M3 Coupes, 2006-2011 328i, 328xi, 328i xDrive, 325i, 325xi, 330i, 330xi, 335i, 335xi, 335i xDrive and M3, 2009-2011 335D, 2006-2012 325xi, 328i, 328xi and 328i xDrive, 2010-2011 X6 ActiveHybrid, 2007-2013 328i, 335i, 335is, M3 Coupes, X5 30si, X5 xDrive30i, X5 xDrive35i, X5 48i, X5 xDrive48i, X5 xDrive50i and X5 M, 2009-2013 X5 xDrive35d and 2008-2014 X6 xDrive35i, X6 xDrive50i and X6M vehicles equipped with non-desiccated driver frontal air bag inflators containing phase stabilized ammonium nitrate (PSAN) that were used as interim remedy parts for previous Takata recalls. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling.
Risk: An inflator explosion may result in sharp metal fragments striking the driver or other occupants resulting in serious injury or death.
Fix: BMW will notify owners, and dealers will replace the driver air bag. On X5 and X6 vehicles, only the inflator will be replaced. All repairs will be performed free of charge. The recall began March 11, 2020. Owners may contact BMW customer service at 1-800-525-7417.
POWER TRAIN:DRIVELINE:CONSTANT VELOCITY JOINT
Campaign #17V067000 · 02/02/2017
POWER TRAIN:DRIVELINE:CONSTANT VELOCITY JOINT
Campaign #17V067000 · 02/02/2017
Issue: BMW of North America, LLC (BMW) is recalling certain 2011-2012 135i Coupe, 1 Series M Coupe and 135i Convertible vehicles, 2011 Z4 sDrive 35i, 335i, 335d, 335i Coupe, 335is Coupe, 335i Convertible, 335is Convertible, 535i, 535i xDrive, 535i Gran Turismo and 550i xDrive Gran Turismo vehicles and 2012 740i and 740Li vehicles. The rear driveshaft constant velocity (CV) joint on the affected vehicles may fatigue and break.
Risk: If the CV joint breaks, the vehicle may have a loss of propulsion, increasing the risk of a crash.
Fix: BMW will notify owners, and dealers will inspect the rear driveshaft CV joint and, based on its production date, will replace it, free of charge. The recall began April 21, 2017. Owners may contact BMW customer service at 1-800-525-7417.
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
Campaign #16V071000 · 05/02/2016
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
Campaign #16V071000 · 05/02/2016
Issue: 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, 335i, 335xi, 335i xDrive Sedans, 2009-2011 335d sedans, 2006-2012 325xiT, 328i and 328xi sports wagons, 2007-2013 328i, 328xi, 328i xDrive, 335i, 335xi, 335i xDrive, 335is and M3 Coupes and Convertibles, 2013-2015 X1 sDrive28i, X1 xDrive28i and X1 xDrive35i SAVs, 2007-2010 X3 xDrive30i SAVs, 2007-2013 X5 xDrive30i, X5 xDrive35i, X5 xDrive48i, X5 xDrive50i and X5 M SAVs, 2009-2013 BMW X5 xDrive35d SAVs, 2008-2014 X6 xDrive35i, X6 xDrive50i, and X6 M SACs, 2010-2011 BMW X6 xDrive50i SACs and 2008-2011 M3 Sedan vehicles. Upon deployment of the driver's frontal air bag, excessive internal pressure may cause the inflator to rupture.
Risk: In the event of a crash necessitating deployment of the driver's frontal air bag, the inflator could rupture with metal fragments striking the driver or other occupants resulting in serious injury or death.
Fix: BMW will notify owners, and dealers will replace the driver's frontal air bag module or inflator depending on the vehicle model, free of charge. The recall began March 9, 2018. Owners may contact BMW customer service at 1-800-525-7417.
ENGINE AND ENGINE COOLING:ENGINE
Campaign #14V176000 · 10/04/2014
ENGINE AND ENGINE COOLING:ENGINE
Campaign #14V176000 · 10/04/2014
Issue: BMW of North America, LLC (BMW) is recalling certain model year 2010-2011 128i Coupe, 128i Convertible, 328i Sedan, 328i xDrive Sedan, 328i Coupe, 328i Convertible, 328i Sports Wagon and Z4 sDrive 30i, 2011-2012 135i Coupe, 135i Convertible, 335i Sedan, X5 xDrive 35i, and X6 xDrive 35i, 2011 335i xDrive Sedan, 335i Coupe, 335i Convertible, 528i Sedan, 535i Sedan, 535i xDrive Sedan, X3 xDrive 28i, and X3 xDrive 35i, 2010 X3 xDrive 30i, and X5 xDrive 30i, 2012 640i Coupe, and 640i Convertible and 2010-2012 535i Gran Turismo vehicles. In the affected vehicles, the bolts that secure the housing for the variable camshaft timing adjustment (VANOS) unit can loosen over time and may possibly break.
Risk: If the bolts loosen or break the engine may have reduced power or stall. An engine stall increases the risk of a crash.
Fix: BMW will notify owners, and dealers will replace the four VANOS housing bolts for both VANOS units (intake and exhaust), free of charge. In addition, owners of approximately 170,172 model year 2010-2012 BMW vehicles equipped with inline 6 cylinder engines not covered by this recall, will receive an extended warranty to address this condition. The recall began on September 24, 2014. Owners may contact BMW at 1-800-525-7417.
ELECTRICAL SYSTEM
Campaign #13V044000 · 07/02/2013
ELECTRICAL SYSTEM
Campaign #13V044000 · 07/02/2013
Issue: 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 through October 2011; 2007-2011 3-Series sedans manufactured March 2007 through October 2011; 2007-2011 3-Series sports wagons manufactured March 2007 through June 2011; and 2009-2011 Z4 vehicles manufactured March 2009 through June 2011. In February 2013, BMW recalled 504,545 vehicles. In July 2013, BMW informed the agency that it was adding 1-Series, 3-Series, and Z4 vehicles, representing an additional 12,094 vehicles. The total number of vehicles being recalled is now 516,791. The connector for the positive battery cable connector and the corresponding terminal on the fuse box may degrade over time. Over time, the high current flow and heat from electrical resistance may lead to a breakage of the connection, and a loss of electrical power to the vehicle.
Risk: If there is a loss of electrical power to the vehicle, the vehicle may unexpectedly stall, increasing the risk of a crash.
Fix: BMW will notify owners, and dealers will replace the positive battery cable connector and secure it with an improved method, free of charge. The recall began on March 13, 2013. Owners may call BMW at 1-800-525-7417 or email BMW at CustomerRelations@bmwusa.com.
Essential maintenance
Critical for safety and preventing major damage
Engine Oil Service (CBS)
Every 10,000 miReplace BMW Longlife-04 (LL-04) full-synthetic oil and filter every 10,000 miles or annually — whichever the CBS system signals first. M-series engines may require shorter intervals; check the vehicle-specific iDrive screen.
Estimated cost — typical U.S. ranges
Dealer
~$120–$160
Shop
~$85–$115
DIY
~$25–$55
Full synthetic costs more than conventional. 5-quart 0W-20 + filter is the typical bill.
Brake Fluid Service (CBS)
Every 24,000 miReplace DOT 4 LV brake fluid every 2 years regardless of mileage. CBS triggers based on time, not miles, due to moisture absorption.
Estimated cost — typical U.S. ranges
Dealer
~$180–$200
Shop
~$125–$140
DIY
~$10–$25
DOT 3 or 4 — match the cap. Vacuum bleeders make this a one-person DIY.
Important maintenance
Keeps your vehicle running smoothly and efficiently
Vehicle Check / Inspection (CBS)
Every 30,000 miMulti-point inspection covering brakes, suspension, steering, exhaust, fluids, lighting, and underbody. CBS signals every 30,000 miles or 2 years.
Estimated cost — typical U.S. ranges
Dealer
~$85
Shop
~$60
DIY
Free
Most shops do this free with any paid service. A flashlight and 10 minutes covers the basics yourself.
Engine Air Filter
Every 40,000 miReplace engine air filter every 40,000 miles. Higher-performance N55, B58, and S58 engines should be inspected at every oil service.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
5-minute job on most cars; the airbox lid usually has clips, no tools needed.
Spark Plugs
Every 60,000 miB48 (2.0L turbo) and B58 (3.0L turbo) require new spark plugs every 60,000 miles. N20/N55 engines often spec 45,000 miles. M-series typically 30,000 miles.
Estimated cost — typical U.S. ranges
Dealer
~$285–$390
Shop
~$200–$275
DIY
~$25–$100
Iridium plugs cost more but last 100k+ miles. V6/V8 access varies wildly — some are tough.
Automatic Transmission Fluid (ZF 8HP)
Every 60,000 miBMW labels the ZF 8HP automatic as 'lifetime fill,' but independent transmission specialists strongly recommend replacement every 60,000 miles. Use BMW-spec ZF Lifeguard 8 — no substitutes.
Estimated cost — typical U.S. ranges
Dealer
~$330–$500
Shop
~$235–$355
DIY
~$60–$180
Some sealed transmissions have no dipstick — fill is precise and best left to a shop. Many drivers can still DIY drain-and-fill.
Rear Differential Fluid
Every 60,000 miRWD and xDrive AWD: replace rear diff fluid every 60,000 miles, sooner with M-Sport or active differential. M-cars require BMW SAF-XO synthetic.
Estimated cost — typical U.S. ranges
Dealer
~$150–$195
Shop
~$105–$135
DIY
~$20–$50
Drain plug + fill plug — straightforward DIY. AWD vehicles have two; budget for both.
xDrive Transfer Case Fluid
Every 60,000 miBMW xDrive AWD: replace transfer case fluid every 60,000 miles. Skipping this causes the most common xDrive failure — actuator stuck in 100/0 split.
Estimated cost — typical U.S. ranges
Dealer
~$105–$140
Shop
~$75–$100
DIY
~$15–$40
AWD/4WD vehicles only. Easy drain-and-fill on most platforms.
Recommended maintenance
Extends the life of your vehicle and improves comfort
Microfilter (Cabin Air Filter)
Every 30,000 miReplace the activated-carbon microfilter every 30,000 miles. Most BMWs have a single combined cabin/charcoal filter behind the engine bay firewall.
Estimated cost — typical U.S. ranges
Dealer
~$60–$95
Shop
~$45–$70
DIY
~$15–$40
Usually behind the glovebox. Shops charge labor for a 10-minute job — easy DIY win.
Engine Coolant (G48 / HT-12)
On condition / lifetimeBMW labels coolant as lifetime fill on most modern vehicles. Independent BMW specialists recommend replacement every 4-5 years to prevent water-pump and thermostat housing degradation.
Estimated cost — typical U.S. ranges
Dealer
~$285–$330
Shop
~$200–$235
DIY
~$25–$60
Use the manufacturer-specified coolant — wrong color/chemistry can damage the cooling system.
Known issues for this vehicle
What drivers and federal regulators have officially reported about the 2012 Bmw 135i.
2 active NHTSA investigations
Source: NHTSADesiccated Air Bag Inflator Rupture
Action #EA21002 · opened Sep 17, 2021
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 200…
Desiccated Air Bag Inflator Rupture
Action #EA21002 · opened Sep 17, 2021
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 200…
Reported to NHTSA
NHTSA has 19 complaints on file for the 2012 Bmw 135i (2013-02 → 2023-05). We haven't reviewed and grouped them yet for this specific YMM — for now, the full list lives on NHTSA.
Top reported components: ENGINE (10) · POWER TRAIN (6) · FUEL/PROPULSION SYSTEM (5)
Issues on other model years
Source: NHTSA Office of Defects Investigation (ODI). Complaint data refreshed Jun 13, 2026. Investigation data refreshed Jun 13, 2026.
We display NHTSA's record with attribution; we don't editorialize on what these complaints mean for any specific vehicle.
Typical U.S. ranges. Actual quotes vary by shop, parts choice, and vehicle condition.
How we estimate: Dealer = OEM parts × 1.4 + labor × $165/hr. Shop = parts + labor × $115/hr. DIY = parts only.
This maintenance schedule for the 2012 Bmw 135i reflects BMW's published service intervals and the Condition-Based Service system. Your actual service needs may vary based on driving conditions, climate, and vehicle usage. Always consult your owner's manual for model-specific recommendations.

