Cómo comprar la ECU usada 05C907309F para coches VAG con motor 1.0 TSI

What Is the Bosch ECU 05C907309F and Which Cars Use It?

The 05C907309F is a Bosch engine control unit (ECU) designed for the EA211 Evo 1.0 TSI petrol engine found across the Volkswagen Group's MQB A0 platform. It manages fuel injection, ignition timing, emissions control, and other core engine functions.

Confirmed fitments include:

• VW Polo (6F / AW) 1.0 TSI 2017–
• VW T-Roc (A11) 1.0 TSI 85 kW 2017–
• VW T-Cross (C11) 1.0 TSI 85 kW 2018–
• SEAT Ibiza (6F / KJ) 1.0 TSI 2017–
• SEAT Arona (KJ7) 1.0 TSI 85 kW 2017–
• Audi A1 1.0 TSI 85 kW (2024 production)
• ŠKODA Fabia (PJ3 / III / IV) 1.0 TSI 2020–2026
• ŠKODA Scala 1.0 TSI 85 kW 2024

If your vehicle is not on this list — for example, a Golf VII/VIII or a 1.5 TSI variant — do not assume compatibility without verifying your car's exact ECU part number in VCDS or a dealer system.

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How to Identify It: OEM Number and Label Markings

The unit carries the VAG OEM number 05C907309F printed on a white label on the ECU housing. You will also see the Bosch internal reference 0 261 S107 K0 (sometimes written 0261S107K0). Both numbers should match the sticker on the unit you receive.

Always cross-check the number on the label with what is shown in ETKA or your workshop's parts catalogue for your specific build date and engine code before ordering.

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Cross-Reference Numbers

| Type | Number | |------|--------| | VAG OEM | 05C907309F | | Bosch part number | 0 261 S107 K0 | | Trade cross-reference | 653-01 |

The trade number 653-01 is used by some aftermarket catalogues and can help you verify fitment in third-party databases.

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What to Check Before Buying a Used ECU

Buying a used ECU requires more care than most mechanical parts. Work through this checklist:

1. Match the full OEM number — even a single suffix letter difference (e.g., 05C907309E vs 05C907309F) can mean a different software calibration or hardware revision.
2. Ask for the donor vehicle's VIN or engine code — confirms the unit genuinely came from a compatible 1.0 TSI EA211 Evo application.
3. Inspect the connector and housing — look for bent pins, corrosion, cracked plastic, or signs of water ingress; ECUs are sensitive to moisture damage.
4. Understand coding requirements — used ECUs typically need to be coded/adapted to your vehicle using VCDS, OBD11, or a VAG dealer tool. Budget for this if you are not doing it yourself.
5. Check for error history — if possible, ask whether the unit has been read before removal; a clean fault memory is a positive sign.
6. Buy from a traceable source — the listing on AutoParts EU describes the unit as used-good condition. You can also browse the full electronics category for related components.

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FAQ

Does a used ECU need to be coded to my car?

Yes. A second-hand ECU retains the previous vehicle's immobiliser and adaptation data. You will need a compatible diagnostic tool (VCDS, OBD11, or a VAG dealer system) to recode it to your VIN. Factor in a workshop visit if you cannot do this yourself.

Can I use this ECU on a 1.5 TSI or a Golf VII?

Not without verification. The 05C907309F is confirmed for specific 1.0 TSI 85 kW applications listed above. Golf VII/VIII and 1.5 TSI variants are not confirmed fitments — always check your car's current ECU part number before ordering.

What does the Bosch number 0261S107K0 tell me?

It is Bosch's own manufacturing reference for the same unit. Having both the VAG number (05C907309F) and the Bosch number (0261S107K0) on the label is a good sign that the part is genuine Bosch-manufactured hardware.