Licensed & Insured.

  • LIC# B18010
Facebook Youtube
SA Locksmith Security new logo

Home › Auto Locksmith San Antonio › Car Keys › BMW Key Fob Replacement › BMW M-Series › BMW M135i F20 (2012-2019)

BMW M135i F20 (2012-2019) Key/Fob Services San Antonio

Professional BMW M135i F20 (2012-2019) key replacement services in San Antonio and surrounding areas. Our certified locksmiths specialize in transponder key programming, key fob replacements, and ignition repair for BMW M135i F20 (2012-2019) vehicles. Trust S.A. Locksmith & Security for fast, reliable, and cost-effective solutions.

★★★★★ 4.9 / 5

1000+ Five-Star Reviews on Google, Yelp & BBB

“Fast, professional, and fair pricing. Best locksmith in San Antonio!” — Maria G.

Read All Reviews →

BMW M135i F20/F21 Model Specifications

BMW M135i F20/F21 Generation Models (2012-2019)

  • M135i F20 (5-door) (2012-2019) – N55 3.0L Turbo I6, Bosch MEVD17.2 DME, CAS4, Keyless Entry
  • M135i F21 (3-door) (2012-2019) – N55 3.0L Turbo I6, Bosch MEVD17.2 DME, CAS4, Keyless Entry
  • Chassis Code: F20 / F21
  • Engine: N55B30M0 3.0L Turbocharged I6
  • Power: 320 hp @ 5,800 rpm
  • Torque: 332 lb-ft @ 1,300-4,500 rpm
  • Transmission: 8-speed automatic ZF 8HP
  • Drivetrain: RWD / xDrive AWD
  • DME/ECU: Bosch MEVD17.2
  • Security System: CAS4 / FEM
  • Key System: Comfort Access Key Fob (315 MHz)
  • Transponder: ID49 Hitag Pro PCF7953P
  • Key Blade: HU100R
  • Key FCC ID: YGOHUF5662
  • Model Years: 2012-2019

BMW M135i F20/F21 Key Services

  • BMW M135i Key Programming – Professional CAS4 transponder programming
  • Key FOB Replacement – Complete BMW M135i key replacement with OEM-quality keys
  • Emergency Lockout Service – 24/7 BMW M135i lockout assistance
  • Ignition System Repair – Complete BMW M135i ignition cylinder and switch repair
  • Remote Key Fob Services – BMW M135i remote programming and battery replacement
  • Comfort Access Programming – Keyless entry system programming and repair

BMW M135i F20 (2012-2019) ECU & Module Services

S.A. Locksmith & Security provides specialized ECU and module services for the BMW M135i F20 (2012-2019). Our technicians have extensive experience with the Bosch MEVD17.2 engine management system and CAS4 / FEM security module used in this vehicle. We offer on-site and in-shop services across San Antonio and surrounding areas.

  • Core ECU Services
  • ECU/DME Cloning - Exact replica cloning of your BMW M135i F20 (2012-2019) Bosch MEVD17.2 module for plug-and-play replacement
  • TCM Cloning - Transmission Control Module cloning for the ZF automatic transmission in your BMW M135i F20 (2012-2019)
  • Immobilizer Service - CAS4 / FEM immobilizer off, EWS delete, and VIN matching for your BMW M135i F20 (2012-2019)
  • VIN Programming - Vehicle identification number update to match your BMW M135i F20 (2012-2019) after module replacement
  • ECU Software Services - Bosch MEVD17.2 software updates, flash recovery, and calibration for your BMW M135i F20 (2012-2019)
  • Key-to-ECU Sync - Synchronizing new keys with the CAS4 / FEM security module in your BMW M135i F20 (2012-2019)
  • Specialized Module Services
  • CAS4 / FEM Module - Cloning and programming for your BMW M135i F20 (2012-2019) CAS4 / FEM body/security controller
  • Airbag Module (SRS) - Crash data reset and module cloning for your BMW M135i F20 (2012-2019)
  • ABS/DSC Module - ABS and Dynamic Stability Control module services for your BMW M135i F20 (2012-2019)
  • Instrument Cluster - Mileage correction, cloning, and replacement programming for your BMW M135i F20 (2012-2019)
  • Turbo Actuator - Electronic turbo actuator calibration and replacement for your BMW M135i F20 (2012-2019)
  • Common Issues We Resolve
  • Faulty or damaged Bosch MEVD17.2 DME requiring replacement or cloning
  • BMW M135i F20 (2012-2019) not starting after ECU or module replacement
  • VIN mismatch errors after installing a used or refurbished module
  • "Bricked" ECU from failed software flash or update attempt
  • Immobilizer lockout - CAS4 / FEM not recognizing keys after module swap
Satisfied Customers
0 +
Google Rating
0
Avg. Response Time
0 min
Years Experience
0 +

Other BMW M-Series Key Replacement – SA Products

View All BMW M-Series Key Replacement – SA Products →

Frequently Asked Questions – BMW M135i F20

The cost to replace a BMW M135i F20 key depends on the key type (Comfort Access smart key) and whether you have a working spare. Prices typically range from $150–$500. S.A. Locksmith & Security offers competitive pricing — call (210) 348-3677 for an exact quote.
The BMW M135i F20 uses a Comfort Access smart key that communicates with the vehicle’s CAS4 immobilizer system. The key must be properly cut and electronically programmed to match your vehicle’s security module before it will start the engine.
Yes. Our mobile locksmith technicians carry the specialized diagnostic equipment needed to program BMW M135i F20 keys on-site. We can come to your home, office, or roadside location anywhere in San Antonio and surrounding areas. The entire process typically takes 30–60 minutes.
If all keys are lost, S.A. Locksmith & Security can still create new keys for your BMW M135i F20. We program directly to the CAS4 immobilizer module to generate new keys from scratch. This is a more involved process but our certified technicians handle it routinely. Call (210) 348-3677 for emergency service.
A qualified automotive locksmith like S.A. Locksmith & Security is typically 30–50% less expensive than the BMW dealership for key replacement and programming. We also offer the convenience of mobile service — we come to you rather than requiring a tow to the dealer. Call (210) 348-3677 for a free quote.

Request a Locksmith

S.A. Locksmith & Security is a full-service, 24/7 locksmith located in San Antonio serving the greater SA area. No project is too big or too small.

📞 (210) 348-3677

We Accept All Major Credit Cards

Contact Us Online
  • 24/7 Emergency Service — day or night
  • Licensed & Insured — Texas DPS License #B17236
  • Free Estimates — transparent pricing
  • 15-Minute Response — fast arrival
  • Satisfaction Guaranteed — 90-day warranty

Note: Pricing and availability may vary. Smart key programming requires professional equipment. Some services may require vehicle VIN verification. All work is backed by our 90-day warranty on parts and labor and manufacturer warranty on hardware. S.A. Locksmith & Security — Licensed (LIC# B18010), Insured, BBB Accredited (A+ Rating). 11401 West Ave, San Antonio, TX 78213. All brand names, logos, and trademarks are the property of their respective owners. S.A. Locksmith & Security is an independent locksmith service provider and is not affiliated with any automobile manufacturer or dealership. 10% Military & Veteran Discount — show valid military ID at time of service.

Need BMW M135i F20 Key & Key Fob Replacement in San Antonio?

S.A. Locksmith & Security provides expert BMW M135i F20 key cutting, key fob replacement, programming, and 24/7 emergency lockout services in San Antonio and surrounding areas. Our mobile technicians come to you — call now for fast, affordable service.

Call (210) 348-3677