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Porsche > 993 (911) (1994-1998) > 993 (911) C2 1994-97 > Electrical & Relays >

Electronic Control Units

Electronic Control Units

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DISPLAYING 1 to 4 (of 8 products)
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Air bag control unit. Porsche 986 Boxster / 996 / 993 - 996618217BX, 996618217BU, 99661821701, 99661821702
1
Air bag control unit. Porsche 986 Boxster / 996 / 993
Special Order item
996618217BX
Product Information
Product Information
exchange
Reconditioned Air bag control unit.

porsche

Fits:
For cars with M562 (Air bag, driver's side and front passenger's side)
Porsche 986 Boxster 1997-04
Porsche 993 1994-98
Porsche 996 Carrera 1997-05
Porsche 996 GT3 1999-05

Please note there is surcharge which is refundable upon return of old unit to us.


    PLEASE NOTE:
  • The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
  • Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
  • Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
  • All surcharges and exchanges are subject to our terms and conditions.




Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

996618217BX
996618217BX
996618217BU
99661821701
99661821702

The product you are viewing cross references to these numbers
ECU control unit Porsche 993 up to 1995 99361812306 - 99361812301, 99361812302, 99361812303, 99361812304, 99361812305, 99361812306, 993618123GX, 993618123GU
1
ECU control unit Porsche 993 up to 1995 99361812306
Special Order item
993618123GX
Product Information
Product Information

exchange

ECU control unit Porsche 993 cars upto 1995

porsche

Fits:
Porsche 993 1996-1998

Please note: this parts is sold on an exchange basis, A surcharge will be held and then refunded when the old one is returned.





Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

993618123GX
99361812301
99361812302
99361812303
99361812304
99361812305
99361812306
993618123GX
993618123GU

The product you are viewing cross references to these numbers
Electronic control module, Tiptronic. Porsche 993 >>95 - 99361811500
3
Electronic control module, Tiptronic. Porsche 993 >>95
Special Order item
99361811500
Product Information
Product Information
Electronic control module, Tiptronic.

porsche

Fits:
Porsche 993 >>1995 Tiptronic transmissnion

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99361811500
99361811500

The product you are viewing cross references to these numbers
Exchange Control Unit (ECU) for Folding Cabriolet Roof for Porsche 911 3.2L / 930 / 964 / 993 1987-1998 - 91161831300, 91161831301, 99361831300, 993618313X, 993618313U
2
Exchange Control Unit (ECU) for Folding Cabriolet Roof for Porsche 911 3.2L / 930 / 964 / 993 1987-1998
Special Order item
993618313X
Product Information
Product Information
exchange Reconditioned Convertible Top Control Module (ECU). 

This control unit is supplied on an exchange basis and is no longer available as a standalone purchase. A refundable surcharge will be added to your order. Once your old control unit has been removed, returned to us, and verified as suitable for refurbishment (in accordance with the terms and conditions below), the surcharge will be refunded.  

Fits (Plug & Play):
Porsche 993 Carrera Cabriolet 1994-98 
Porsche 993 Carrera 4 Cabriolet 1995-98 
Porsche 993 Turbo Cabriolet 1995 

Fits (Modification Required):
The cabriolet top control module originally fitted to the models listed below is no longer available for purchase. It has been superseded by a later module, which was factory-fitted to 993 models. This replacement module is compatible with the models outlined below, but significant wiring modifications are required. Please refer to the attached PDF for further information. 

Porsche 911 3.2L Carrera Cabriolet 1987-89 - With Electric Folding Roof (PR 439)
Porsche 911 (930) 3.3L Turbo Cabriolet 1987-89 - With Electric Folding Roof (PR 439)

Porsche 964 Carrera Cabriolet 1990-94 
Porsche 964 Carrera 4 Cabriolet 1990-94
Porsche 964 Turbo Cabriolet 1993 

Terms & Conditions - Exchange Purchase:

The surcharge for this product will be refunded only after your existing control unit has been:

1.) Removed from your vehicle
2.) Returned to us at your own expense
3.) Accepted by the manufacturer as suitable for reconditioning

Please note that the assessment and approval of the returned unit is solely at the discretion of the manufacturer.

Refund processing times typically range from 1 to 2 weeks after the unit is received. However, in some cases, it may take up to 8 weeks for the manufacturer to complete their evaluation and issue approval.

All exchange purchases and surcharge refunds are subject to our full Terms & Conditions, available on our website.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

993618313X
91161831300
91161831301
99361831300
993618313X
993618313U

The product you are viewing cross references to these numbers
DISPLAYING 1 to 4 (of 8 products)
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About Electronic Control Units

Electronic Control Units (ECUs) – Precision Performance and Reliability for Porsche Vehicles

Electronic Control Units (ECUs) are the brains of your Porsche’s electronic systems, managing and monitoring everything from engine performance to fuel delivery, ignition timing, transmission response, and emissions control. These highly sophisticated modules communicate with multiple sensors and actuators to ensure your car runs efficiently, safely, and smoothly under all driving conditions.

At Design911, we supply a wide range of genuine and high quality ECUs for Porsche models - including engine control units, transmission control modules, body control units, and more. Each ECU is manufactured to the highest standards, ensuring exact compatibility and seamless communication with your vehicle’s electronic architecture.

What Do Electronic Control Units Do?

An ECU acts as the central processor of a vehicle’s system, interpreting data from sensors and adjusting performance parameters in real-time. Depending on the application, ECUs can control:

  • Engine management: fuel injection, ignition timing, turbo boost, and air-fuel ratios.
  • Transmission systems: shift points, torque converter lock-up, and gear selection.
  • ABS and traction control: maintaining grip and stability.
  • Body systems: lighting, climate control, and interior functions.

Modern Porsche vehicles often contain multiple ECUs working together across a CAN bus network, ensuring optimal efficiency, emissions compliance, and driver comfort.

Why Do ECUs Fail?
Electronic Control Units are robust, but can fail due to age, environmental factors, or electrical faults. Common causes include:

  • Water ingress or corrosion: damaging internal circuits.
  • Voltage spikes or short circuits: caused by battery or alternator issues.
  • Thermal stress: from prolonged engine heat cycles.
  • Software corruption or data errors: due to low voltage or improper programming.
  • Connector and harness faults: causing poor communication with sensors.

Symptoms of ECU failure may include engine misfires, warning lights, poor performance, stalling, or failure to start.

Why replace your ECU?
A faulty ECU can cause unpredictable performance, poor fuel economy, and safety concerns. Replacing a malfunctioning unit restores the precision and reliability your Porsche was built to deliver.

Benefits of replacing with a quality ECU include:

  • Full compatibility with vehicle systems.
  • Restored factory performance and efficiency.
  • Elimination of warning lights and diagnostic faults.
  • Improved reliability and drivability.

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