Address
Email
Phone
Bosch vs Delphi Diesel Injectors: What’s the Difference?
Bosch vs Delphi Diesel Injectors: What’s the Difference?
When it comes to diesel injector replacements, two names dominate the UK market: Bosch and Delphi. But which one is right for your vehicle—and what are the key differences between them?
At Diesel Injector Pro, we supply both brands reconditioned to OEM standards. Here’s a breakdown to help you make an informed choice.
1. Technology & Design
| Feature | Bosch | Delphi |
|---|---|---|
| Injection Type | Common Rail | Common Rail & Unit Injector |
| Spray Pattern | Fine atomization, multi-hole | High-pressure, narrow cone |
| Operating Pressure | Up to 2,500 bar | Up to 2,000 bar |
| ECU Coding | Required for most models | Required for most models |
Learn more about Bosch Common Rail technology and Delphi diesel systems.
2. Vehicle Compatibility
- Bosch: Widely used in Volkswagen, Audi, BMW, Ford, and Mercedes-Benz
- Delphi: Common in Vauxhall, Renault, Peugeot, Citroën, and Land Rover
Need help identifying your injector? Use our cross-reference tool or check Delphi’s part finder.
3. Common Faults & Symptoms
Delphi injectors are more sensitive to fuel contamination, while Bosch units tend to fail electrically or due to internal leakage.
For a deeper dive, see this guide on diesel injector failure modes.
4. Reconditioning & Replacement
At Diesel Injector Pro, we recondition both Bosch and Delphi injectors using OEM-grade components and test them on industry-standard benches.
- Bosch Example: 0445110xxx Series Injectors
- Delphi Example: R9044Z Series Injectors
Each unit comes with:
- 12-month warranty
- Flow test report
- Free UK delivery