How to access the clutch master cylinder by removing the Engine Control Module and electronics box on Audi A4?

The Power/rain Control Module (PCM), located within a waterproof box at the left end of the cowl area, requires reprogramming with a proprietary scan tool and cannot be replaced at home. In many models, the PCM is housed in a special metal anti-theft box, making removal extremely challenging. This procedure focuses on accessing the clutch master cylinder by removing the PCM and electronics box. Begin by disconnecting the cable from the negative battery terminal, then remove the cowl cover. Next, take off the cover from the electronics box and pry off the retaining strap from the PCM, moving it aside. Some models feature an anti-theft housing secured with shear-head bolts that need to be heated with a heat gun before being unscrewed with locking pliers, ensuring heat is only applied to the bolts not threaded into the PCM. Unplug the electrical connectors near the firewall, pull back the release tabs to detach the relay carrier from the electronics box, dislodge the grommet, and pull the wiring harness through the opening. Finally, unscrew the fasteners to remove the electronics box from the cowl area, and installation follows the reverse order of removal.

Genuine Audi Engine Control Module

Engine Control Computer

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449 Engine Control Modules found

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Audi Cold Start Injector Part Number: 035-911-311-E
$239.01 MSRP: $334.75
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Product Specifications
- Other Name: Armature; Bushing, Cold Start Injector, ECM
- Replaced by: 021-911-311-B
Fits the following Audi Models:
- 100 | 1989-1994 | Base, CS, E, S | 5 Cyl 2.3 L GAS, 6 Cyl 2.8 L GAS
- 100 Quattro | 1989-1994 | Base, CS | 5 Cyl 2.3 L GAS, 6 Cyl 2.8 L GAS
- 200 | 1989-1991 | Base | 5 Cyl 2.2 L GAS
- 200 Quattro | 1989-1991 | 20v, 20v Avant, Avant, Base | 5 Cyl 2.2 L GAS
- 4000 Quattro | 1986-1987 | CS | 5 Cyl 2.2 L GAS
- 5000 | 1986-1988 | CS, S | 5 Cyl 2.2 L GAS, 5 Cyl 2.3 L GAS
- 5000 Quattro | 1986-1988 | CS, S | 5 Cyl 2.2 L GAS, 5 Cyl 2.3 L GAS
- 80 | 1991-1992 | Base | 5 Cyl 2.3 L GAS
- 80 Quattro | 1988-1992 | Base | 5 Cyl 2.3 L GAS
- 90 | 1993-1995, 1988-1991 | Base, CS, S, Sport | 5 Cyl 2.3 L GAS, 6 Cyl 2.8 L GAS
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Audi ECM Part Number: 8P0-997-020-CX
$506.10 MSRP: $700.00
You Save: $193.90 (28%)
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Product Specifications
- Other Name: Control Unit
Fits the following Audi Models:
- A3 | 2006 | Base | 4 Cyl 2.0 L GAS
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Audi ECM Part Number: 8P0-997-033-BX
$694.96 MSRP: $898.46
You Save: $203.50 (23%)
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Product Specifications
- Other Name: Control Unit
- Replaces: 8P0-997-032-HX
Fits the following Audi Models:
- A3 | 2009 | Base | 4 Cyl 2.0 L GAS
- A3 Quattro | 2009 | Base | 4 Cyl 2.0 L GAS
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Audi ECM Part Number: 4K0-906-259-A-4K0
$944.94 MSRP: $1221.64
You Save: $276.70 (23%)
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- A6 Quattro | 2019-2021 | Premium, Premium Plus | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 4K0-907-559-A-4K0
$720.89 MSRP: $931.98
You Save: $211.09 (23%)
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- A6 Quattro | 2019-2020 | Premium, Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 4M0-907-559-L-4M0
$1289.35 MSRP: $1547.84
You Save: $258.49 (17%)
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Product Specifications
- Other Name: Control Unit; ECM
- Replaces: 4M0-907-559-L
Fits the following Audi Models:
- Q7 | 2021 | Premium, Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 4M0-907-559-Q-4M0
$713.30 MSRP: $922.17
You Save: $208.87 (23%)
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Product Specifications
- Other Name: Control Unit; ECM
- Replaces: 4M0-907-559-Q
Fits the following Audi Models:
- Q7 | 2022 | Premium, Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 4M8-907-559-Q-4MF
$720.89 MSRP: $931.98
You Save: $211.09 (23%)
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Product Specifications
- Other Name: Control Unit; ECM
- Replaces: 4M8-907-559-Q
Fits the following Audi Models:
- Q8 | 2022-2023 | Premium, Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 80A-906-259-AA-FY0
$713.30 MSRP: $922.16
You Save: $208.86 (23%)
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- Q5 | 2022 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- Q5 PHEV | 2022 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Audi ECM Part Number: 80A-906-259-S-FY0
$713.30 MSRP: $922.16
You Save: $208.86 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- Q5 | 2021 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- Q5 PHEV | 2021 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Audi ECM Part Number: 8V0-907-115-J-8V0
$720.89 MSRP: $931.98
You Save: $211.09 (23%)
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Product Specifications
- Other Name: Control Unit; ECM
- Replaces: 8V0-907-115-J
Fits the following Audi Models:
- A3 | 2019 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
- A3 Quattro | 2019 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi ECM Part Number: 04L-997-022-N
$685.95 MSRP: $886.81
You Save: $200.86 (23%)
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Product Specifications
- Other Name: Module; ECM
- Replaces: 04L-906-021-D
Fits the following Audi Models:
- A3 | 2015-2016 | TDI Premium, TDI Premium Plus, TDI Prestige | 4 Cyl 2.0 L DIESEL
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Audi ECM Part Number: 8W0-906-259-J
$1839.97 MSRP: $2208.84
You Save: $368.87 (17%)
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- A4 allroad | 2017-2018 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
- A5 Quattro | 2020, 2018 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
- A5 Sportback | 2018-2020 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi ECM Part Number: 8N0-997-020-HX
$641.29 MSRP: $825.00
You Save: $183.71 (23%)
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Product Specifications
- Other Name: Control Unit
Fits the following Audi Models:
- TT | 2003 | Base | 4 Cyl 1.8 L GAS
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Audi ECM Part Number: 4K0-907-551-G-4K0
$1214.93 MSRP: $1458.50
You Save: $243.57 (17%)
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- S6 | 2022 | Premium Plus, Prestige | 6 Cyl 2.9 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 4M8-907-559-M-4MF
$720.89 MSRP: $931.98
You Save: $211.09 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Control Unit; ECM
- Replaces: 4M8-907-559-M
Fits the following Audi Models:
- Q8 | 2021 | Premium, Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 4M8-907-559-A-4MF
$713.30 MSRP: $922.17
You Save: $208.87 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Control Unit; ECM
- Replaces: 4M8-907-559-A
Fits the following Audi Models:
- Q8 | 2019-2020 | Premium, Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 8W0-907-115-AC-8W0
$720.89 MSRP: $931.98
You Save: $211.09 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Control Unit; ECM
Fits the following Audi Models:
- A4 Quattro | 2021 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
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Audi ECM Part Number: 5G0-906-259-A
$807.34 MSRP: $1043.75
You Save: $236.41 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Control Unit
Fits the following Audi Models:
- A3 Quattro | 2015-2016 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
- S3 | 2015-2016 | Premium Plus, Prestige | 4 Cyl 2.0 L GAS
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Audi ECM Part Number: 022-997-020-DX
$667.17 MSRP: $858.46
You Save: $191.29 (23%)
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Product Specifications
- Other Name: Control Unit
Fits the following Audi Models:
- A3 Quattro | 2009 | Base | 4 Cyl 2.0 L GAS, 6 Cyl 3.2 L GAS

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Audi Engine Control Module

Imagine walking down a steep road. Your brain would instinctively tell you to do this slowly and with care. Now think about your car. When driving in uncommon situations like going in reverse or down a hill, the Audi Engine Control Module (ECM) acts as the brain for your vehicle by calculating optimal fuel-air mixtures, ignition timing, and other vital factors that make it run well. If your car doesn't start, it might be because of a starter or a battery problem. However, if you are experiencing sudden stops, jerking, and problems shifting gears in an automatic transmission, it is most likely that the ECM is malfunctioning. Regularly check your Audi engine control module, as this can prevent future hazards, and don't wait until the gauge panel's warning light illuminates it to take this precautionary step.

It is better to choose OEM parts when it comes to the time for fixing them. Why? Because they fit perfectly well and ensure safety. For people who prefer doing their maintenance, the genuine Audi Engine Control Module is quite perfect. At AudiPartsGiant.com, we specialize in genuine Audi Engine Control Modules only. Also, we offer an extensive online catalog with many categories, ample stock, and secure shopping. The Audi Engine Control Module is shipped directly from authorized Audi dealers at competitive prices. So trust us, and we will give you nothing but superior service. Depend on us for all your genuine parts needs, and then we will keep your automobile moving smoothly.

Audi Engine Control Module Parts and Q&A

ECM
8E0-909-518-AF
Q: How to access the clutch master cylinder by removing the Engine Control Module and electronics box on Audi A4?
A:
The Power/rain Control Module (PCM), located within a waterproof box at the left end of the cowl area, requires reprogramming with a proprietary scan tool and cannot be replaced at home. In many models, the PCM is housed in a special metal anti-theft box, making removal extremely challenging. This procedure focuses on accessing the clutch master cylinder by removing the PCM and electronics box. Begin by disconnecting the cable from the negative battery terminal, then remove the cowl cover. Next, take off the cover from the electronics box and pry off the retaining strap from the PCM, moving it aside. Some models feature an anti-theft housing secured with shear-head bolts that need to be heated with a heat gun before being unscrewed with locking pliers, ensuring heat is only applied to the bolts not threaded into the PCM. Unplug the electrical connectors near the firewall, pull back the release tabs to detach the relay carrier from the electronics box, dislodge the grommet, and pull the wiring harness through the opening. Finally, unscrew the fasteners to remove the electronics box from the cowl area, and installation follows the reverse order of removal.