Every control module on the 2024-2026 Mazda CX-90 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Hybrid Control Module (HCM) 2.0 hr R&R security gateway +1.5 hr ▸ programming details
📍 Engine compartment or under vehicle near electric motor/generator
🔧 Mazda MMDS + VCM II
⚠️ PHEV models only. Controls hybrid powertrain operation, motor/generator, power split. High-voltage system - requires certified technician.
Electric Power Steering Control Module (EPS-CM) 1.8 hr R&R security gateway +0.5 hr ▸ programming details
📍 Steering column area or integrated with steering rack
🔧 Mazda MMDS + VCM II
⚠️ Column-assist or rack-mounted depending on trim. Requires steering angle sensor calibration and torque sensor zero-point learning.
Dynamic Stability Control Module (DSC) 1.5 hr R&R security gateway +0.5 hr ▸ programming details
📍 Engine compartment, driver side near brake master cylinder or ABS pump assembly
🔧 Mazda MMDS + VCM II
⚠️ Integrated ABS, traction control, stability control. Requires brake bleed procedure and system calibration after replacement.
Mazda Connect Communication Module Unit (CMU) 1.5 hr R&R security gateway +0.8 hr ▸ programming details
📍 Dashboard, center stack behind infotainment screen or under center console
🔧 Mazda MMDS + VCM II
⚠️ 10.25-inch or 12.3-inch display depending on trim. Controls navigation, audio, connectivity. Requires software installation and feature activation.
Transmission Control Module (TCM) 1.5 hr R&R security gateway +1.0 hr ▸ programming details
📍 Engine compartment, passenger side near battery or integrated with valve body inside transmission
🔧 Mazda MMDS + VCM II
⚠️ 8-speed automatic transmission. External TCM on some variants, internal on others. Requires VIN sync and adaptive learning reset.
All-Wheel Drive Control Module (AWD-CM) 1.5 hr R&R aftermarket tool +0.5 hr ▸ programming details
📍 Under vehicle, near transfer case or rear differential
🔧 Autel MaxiSys or Mazda MMDS
⚠️ i-Activ AWD system. Controls torque distribution front/rear. Requires system initialization and may need fluid service after replacement.
Powertrain Control Module (PCM) 1.2 hr R&R security gateway +1.0 hr ▸ programming details
📍 Engine compartment, driver side firewall area, mounted on bulkhead
🔧 Mazda MMDS + VCM II
⚠️ Requires VIN writing, immobilizer pairing, and gateway authentication through Mazda servers. Must be programmed before engine will start.
CAN Gateway Module (CGW) 1.2 hr R&R security gateway +1.5 hr ▸ programming details
📍 Dashboard, center console area or behind instrument cluster
🔧 Mazda MMDS + VCM II
⚠️ Security gateway for all CAN networks. Replacement requires dealer authentication and all other modules may need re-initialization. Critical security component.
Climate Control Module (CCM) 1.2 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Dashboard, center stack behind climate control panel
🔧 Autel MaxiSys or Mazda MMDS
⚠️ Dual-zone or tri-zone automatic climate. Requires actuator calibration and temperature sensor learning.
Power Liftgate Module (PLG) 1.2 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Rear liftgate, driver side inside liftgate trim or D-pillar
🔧 Autel MaxiSys or Mazda MMDS
⚠️ Power liftgate with hands-free operation. Requires height and speed calibration after replacement.
Blind Spot Monitoring Module (BSM) 1.2 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Rear bumper, driver and passenger side corners inside bumper cover
🔧 Autel MaxiSys or Mazda MMDS
⚠️ Radar sensors in rear bumper. Requires sensor alignment check after bumper removal or collision repair.
Connectivity Master Unit (CMU-T) 1.0 hr R&R security gateway +0.5 hr ▸ programming details
📍 Dashboard, behind infotainment screen or integrated with CMU
🔧 Mazda MMDS + VCM II
⚠️ Handles Mazda Connected Services, cellular connectivity, Wi-Fi hotspot. Requires account provisioning and subscription activation.
Body Control Module (BCM) 1.0 hr R&R security gateway +0.8 hr ▸ programming details
📍 Dashboard, driver side lower kick panel or behind glove box
🔧 Mazda MMDS + VCM II
⚠️ Controls lighting, wipers, power windows, door locks. Requires configuration for installed options and VIN writing.
Camera Control Module (CCM) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Rear cargo area near liftgate or integrated with CMU
🔧 Autel MaxiSys or Mazda MMDS
⚠️ 360-degree camera system. Requires camera calibration and alignment after replacement or windshield/camera service.
Door Module (DM) 1.0 hr R&R aftermarket tool +0.2 hr ▸ programming details
📍 Inside each door, behind door panel near latch area
🔧 Autel MaxiSys or Mazda MMDS
⚠️ Controls power windows, mirrors, locks per door. Requires window auto-up/down relearn after replacement or battery disconnect.
Adaptive Front-lighting System Module (AFS) 1.0 hr R&R aftermarket tool +0.3 hr ▸ programming details
📍 Engine compartment, behind headlight assemblies or integrated in headlight units
🔧 Autel MaxiSys or Mazda MMDS
⚠️ LED adaptive headlights with auto-leveling. Requires headlight aiming and leveling sensor calibration after replacement.
Instrument Cluster (IC) 0.8 hr R&R security gateway +0.5 hr ▸ programming details
📍 Dashboard, behind steering wheel in instrument binnacle
🔧 Mazda MMDS + VCM II
⚠️ 12.3-inch digital display. Requires VIN writing and mileage programming from old cluster or legal documentation.
Keyless Control Module (KCM) 0.8 hr R&R security gateway +1.0 hr ▸ programming details
📍 Dashboard, center console or integrated with BCM
🔧 Mazda MMDS + VCM II
⚠️ Controls keyless entry, push-button start, immobilizer. All keys must be re-programmed after replacement.
Restraints Control Module (RCM) 0.8 hr R&R security gateway +0.5 hr ▸ programming details
📍 Center console, under front seats, or center tunnel area
🔧 Mazda MMDS + VCM II
⚠️ Disconnect battery and wait 90 seconds before removal. Requires crash data clear and occupant classification calibration.
Driver Monitoring System Module (DMS) 0.8 hr R&R security gateway +0.5 hr ▸ programming details
📍 Dashboard, top of steering column or integrated with instrument cluster
🔧 Mazda MMDS + VCM II
⚠️ Infrared camera monitors driver attention. Requires calibration and privacy settings configuration. May be integrated with other modules.
Parking Sensor Module (PSM) 0.8 hr R&R aftermarket tool +0.2 hr ▸ programming details
📍 Rear cargo area, driver side trim panel or under rear bumper
🔧 Autel MaxiSys or Mazda MMDS
⚠️ Front and rear parking sensors. Requires sensor calibration if sensors are disturbed.
Seat Control Module (SCM) 0.8 hr R&R aftermarket tool +0.2 hr ▸ programming details
📍 Under front seats, driver and passenger side
🔧 Autel MaxiSys or Mazda MMDS
⚠️ Power seat adjustment, heating, ventilation, memory. Requires memory position relearn if equipped.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour?
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