Which engines use the Bosch 0445115085 injector?

0445115085 is verified for the 4.2L V8 TDI CR platform, covering engine code BTR. Confirm the engine code on your V5C before ordering.

Which vehicles does 0445115085 fit?

This family has 1 verified fitment across Audi — the full registry-verified list is on this page.

My injector is etched with a different number — is it the same part?

0445115085 cross-references 0445115086, 0986435364, 0445115040, 0445115041, 0445115057 and 0445115058 among others. If your etched number appears in this family's reference list it is a verified equivalent; if not, send us a photo of the etching and we will confirm before you order.

Do I need to code the replacement injector to the ECU?

Yes on common-rail diesels. Every injector ships with an individual calibration code that must be written to the ECU after fitting, following the manufacturer procedure — without it the engine runs on default trims and can log cylinder-balance faults.

How is each injector tested before despatch?

Every unit is bench-calibrated against the manufacturer specification — delivery, back-leak and response verified — and despatched with a 12-month parts warranty and its calibration data retained on file.

Trusted FamilyBoschRemanufactured

Bosch 0445115085 Diesel Injector

Name: Bosch 0445115085 Remanufactured Diesel Injector
Brand: Bosch
SKU: 0445115085
Price: 200.00 GBP
Availability: InStock

4.2L V8 TDI CR · 0445115085

Remanufactured Bosch 0445115085 piezo common-rail diesel injector for the Audi Q7 4.2 TDI quattro — engine code BTR (2007–2009). Bosch Exchange number 0986435364. Direct replacement for Audi OE 057130277AK / 057130277AG / 057130277AD / 057130855AX and Bosch cross-references 0445115086, 0445115040, 0445115041, 0445115057, 0445115058, 0986435374, 0986435375. OEM-tested and calibrated with full flow and leak-back verification on CR318 PRO test bench. Includes 12-month unlimited-mileage warranty. Supplied as an exchange unit — return your old injector within 30 days.

Engine codes

OE / cross-refs

Vehicle fitments

12mo

Warranty

Common failure symptoms

On the 4.2L V8 TDI CR platform, a failing Bosch 0445115085 injector typically presents as: hard starting or extended cranking; rough or uneven idle; loss of power under load; excess smoke from the exhaust; cylinder misfire or contribution fault codes.

When two or more of these appear together, suspect the injector before peripheral systems — a comparative leak-off test and live-data cylinder-balance review will isolate the failed unit without tear-down.

When two or more symptoms appear together, suspect the injector before peripherals (EGR, glow plugs, turbo). A live-data leak-off test on each cylinder is the fastest route to the failed unit.

What Causes These Injectors To Fail

The documented failure modes on this platform are: injector back-leak beyond specification; nozzle wear degrading the spray pattern; combustion gas leaks past the injector seat washer.

Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

How Workshops Diagnose 0445115085 Faults

Run a comparative leak-off (back-leak) test across all injectors before condemning a single unit. Compare requested vs actual rail pressure in live data at idle and under load. Inspect injector connectors and wiring before replacing hardware.

Never condemn a common-rail injector on a fault code alone — codes identify the circuit or cylinder, while leak-off volumes and correction values identify the component.

How Every Unit Is Tested Before Despatch

Each remanufactured 0445115085 is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is then calibrated on a common-rail test bench against the manufacturer's specification sheet — delivery, back-leak and response are all verified before the injector is sealed and despatched with its calibration data on file.

Every unit carries a 12-month parts warranty and free UK delivery.

Vehicle Coverage At A Glance

The 0445115085 trusted family covers 1 verified vehicle fitment across 1 make: Audi. Every fitment listed on this page is registry-verified — no scraped or assumed applications.

OE & Cross-References

0445115085 supersedes or cross-references 12 further OE numbers, including 0445115086, 0986435364, 0445115040, 0445115041, 0445115057, 0445115058, 0986435374 and 0986435375. Always match the reference etched on your failed unit's body — cross-references within a family are verified equivalents, but etched numbers remain the source of truth.