A worn Common Rail injector can disturb fuel metering and spray quality, affecting combustion and engine running. The Siemens/VDO unit with reference 03L130277B is used on VW 1.6 TDI CAYA applications and must be matched by reference numbers and engine code.
Part identification and catalog/cross-references
The injector reference 03L130277B is a Siemens/VDO diesel injector application for VW 1.6 TDI CAYA family engines using Common Rail fuel metering. The same fitment family is also listed under 03L130277S, so the correct reference pairing must be confirmed against the old unit markings before ordering 03L130277B.
Cross-reference data for this injector set includes A-A2C9626040080, plus vehicle-brand listings that appear as AUDI 03L 130 277 B, SEAT 03L 130 277 B, and SKODA 03L 130 277 B. Treat these as matching catalog references for the same injector identification, but always verify the exact reference number on the removed injector body before installation.
- Primary reference: 03L130277B
- Related reference: 03L130277S
- Cross-references: A-A2C9626040080, AUDI 03L 130 277 B, SEAT 03L 130 277 B, SKODA 03L 130 277 B
Because injector calibration is tied to precise fuel delivery and spray behaviour in the Common Rail system, a mismatch can show up as poor combustion quality and rough running. That’s why the reference number, engine code and vehicle data must be cross-checked with the old unit before fitting 03L130277B.
Vehicle compatibility with ONE table
Compatibility is listed for 1.6 TDI applications across the VW group platforms, with model-year ranges provided for the injector reference set that includes 03L130277B and its related 03L130277S listing. Use the table below to narrow the vehicle, then confirm the engine code and the injector reference on the removed unit.
| Make / Model | Engine | Fitment range (as listed) |
|---|---|---|
| AUDI A1 (8X1, 8XK) | 1.6 TDI | 03/2011-04/2015 |
| AUDI A1 (8X1, 8XK) | 1.6 TDI | 05/2010-04/2015 |
| AUDI A1 Sportback (8XA, 8XF) | 1.6 TDI | 11/2011-04/2015 |
| AUDI A3 (8P1) | 1.6 TDI | 05/2009-08/2012 |
| AUDI A3 Cabriolet (8P7) | 1.6 TDI | 05/2009-05/2013 |
| AUDI A3 Sportback (8PA) | 1.6 TDI | 05/2009-03/2013 |
| SEAT ALTEA (5P1) | 1.6 TDI | 10/2009-07/2015 |
| SEAT ALTEA (5P1) | 1.6 TDI | 11/2010-07/2015 |
| SEAT ALTEA XL (5P5, 5P8) | 1.6 TDI | 10/2009-07/2015 |
| SEAT ALTEA XL (5P5, 5P8) | 1.6 TDI | 11/2010-07/2015 |
Even with this listed compatibility, the injector identification must still be confirmed by reference number 03L130277B (and related 03L130277S) and by the engine code for the vehicle. The cross-reference set (AUDI 03L 130 277 B, SEAT 03L 130 277 B, SKODA 03L 130 277 B, and A-A2C9626040080) helps match parts catalogues, but it does not replace checking the old injector.
Fitment checks and installation cautions
Before fitment of 03L130277B, compare the reference number and any markings on the removed injector to ensure the correct unit is being installed. The listing explicitly requires matching reference numbers, OEM-nummer context where applicable, engine code (motorkennbuchstaben), and vehicle data, because injector calibration is tied to precise fuel metering in the Common Rail system.
Common Rail injector performance depends on correct delivery and spray behaviour, so small deviations can affect combustion quality, cold start behaviour, engine running, fuel consumption, and the way power is delivered. That’s why a wrong reference—despite being “close” in a catalogue—can still cause drivability complaints on a 1.6 TDI application that uses the Siemens/VDO injector family.
- Confirm the old injector reference number matches 03L130277B or the related 03L130277S listing.
- Use the engine code and vehicle data to validate fitment for the 1.6 TDI range shown above.
- Cross-check catalogue matches using A-A2C9626040080, AUDI 03L 130 277 B, SEAT 03L 130 277 B, and SKODA 03L 130 277 B.
If the injector body markings don’t align with 03L130277B, do not proceed on model-year alone. The safest approach is to match by reference number first, then confirm the engine code for the CAYA 1.6 TDI family before fitting the Siemens/VDO unit.
Symptoms/selection notes for 03L130277B
When an injector in a Common Rail system is not delivering correctly, the listing highlights direct effects on combustion and engine running. For the 03L130277B injector reference set, selection should be driven by the need for precise fuel metering and correct spray behaviour, because that influences cold start performance, running quality, consumption, and power delivery.
In practice, technicians tend to see drivability concerns where fuel metering accuracy is off, and those concerns are exactly what injector calibration is meant to restore. If the vehicle is showing rough running or poor combustion indicators, the injector reference match (03L130277B with the related 03L130277S) becomes a critical selection step rather than a “best match” guess.
Because the cross-reference set includes A-A2C9626040080 and brand-formatted references like AUDI 03L 130 277 B, SEAT 03L 130 277 B, and SKODA 03L 130 277 B, it’s easy to order the wrong variant if the old-unit reference isn’t checked. Always confirm the exact reference number on the removed injector before fitting 03L130277B to a VW 1.6 TDI CAYA application.
Internal product link for 03L130277B injector
For the Siemens/VDO injector reference 03L130277B (with related 03L130277S listing) for VW 1.6 TDI CAYA, use this fitment page to confirm the exact part number and application details: 03L130277B diesel injector Siemens/VDO for VW 1.6 TDI CAYA.
Frequently Asked Questions
How do I confirm the correct diesel injector reference for a VW 1.6 TDI CAYA?
Check the reference number printed or stamped on the removed injector body and compare it to 03L130277B. Also verify the engine code and vehicle data for the application, because injector calibration is tied to precise fuel metering in the Common Rail system.
What does the related injector reference 03L130277S mean for 03L130277B fitment?
The listing pairs 03L130277B with a related reference 03L130277S, which indicates a matching injector identification family. You still need to confirm the exact reference on the old unit before fitting, rather than relying on model-year alone.
Can cross-reference numbers like A-A2C9626040080 replace checking the injector reference?
Cross-references such as A-A2C9626040080 help match parts catalogues, but they are not a substitute for verifying the old injector reference number. Always confirm 03L130277B (or the related 03L130277S) against the removed unit markings.
What symptoms point to an injector metering or spray issue on Common Rail diesels?
Poor injector metering and spray behaviour can affect combustion quality, cold start performance, engine running, fuel consumption, and how power is delivered. If the injector identification is wrong, those effects can persist even after parts are replaced.
Why is injector matching by engine code and vehicle data necessary even with a compatible model list?
The compatibility list covers 1.6 TDI applications, but injector calibration still depends on the correct identification for the specific engine. Matching by reference number (03L130277B) and engine code reduces the risk of incorrect fuel delivery and running issues.