Bosch 0445120347 Common Rail Fuel Injector for Caterpillar C7.1 / Perkins 1100

1. Product Overview

Brand new Bosch 0445120347 common rail fuel injector (type CRIN2-16, 1600 bar) with Caterpillar OE number 371-3974, for Caterpillar C7.1 engines (e.g. E320D2 excavators) and the same engine family in Perkins 1100 series form (1104D-E44T / 1106D-E66TA). The evidence chain combines the manufacturer’s application table (Perkins 1100 series / Caterpillar-Perkins, with the 3713974 number visible) and several independent market listings that consistently pair this Bosch number with 371-3974 and the C7.1. This injector and 0445120348 are sold side by side everywhere with identical documentation and the same compatible number 0445120516 — they are believed to be the same application with different calibrations, and no source separates them, so check both linked pages and order strictly by the Bosch number engraved on your old injector. Nozzle and control valve values could not be retrieved in this round and no Bosch exchange number has been confirmed, so those fields are left blank. A Perkins-side candidate number seen in a single listing title is recorded in our verification file only and is not used as an OE here.

2. Specifications

3. Fitment

Caterpillar C7.1 engines (including E320D2) and Perkins 1100 series engines 1104D-E44T / 1106D-E66TA (same engine family). This number and 0445120348 share the application; which of the two your engine needs is decided by the Bosch number engraved on your old injector. Fitment data is for reference only — please confirm by the number engraved on your old injector or send us your VIN before ordering.

4. Cross-Reference

Note: no Bosch exchange number, nozzle or control valve could be confirmed for this injector, so none is listed. Two further Cat-format numbers (391-3974 and 396-9626) appear bundled in one listing title alongside 371-3974 — they are unconfirmed for this injector and are named here only so you do not mistake them for its OE; 371-3974 is the documented one.

5. After-Sales & Warranty

Professional installation by a qualified diesel technician is recommended. Every injector is covered by a 6-month warranty (3 months for wear parts). Defective or wrong items can be returned or exchanged within 15 days of receipt; return shipping is on the buyer unless the error is ours. Orders are processed within 1–2 business days with tracking, and refunds are issued within 7 business days after inspection. Full terms: see our Shipping & Returns page.

6. Why Choose Us

Factory-direct supply from Wuhan Ranyingyi Trading Co., Ltd. (injector-factory.com). Every injector is bench-tested before shipment, packed for export, and backed by fast, technical support on WhatsApp (+86 156 3802 2858) — send us your old injector’s engraved number or your VIN and we verify the exact match free of charge before you pay.

FAQ

Q1: How can I be sure this injector fits my engine?
A: Send us the number engraved on your old injector, or your VIN, on WhatsApp (+86 156 3802 2858). Our technicians will verify the exact compatibility free of charge before you order. Fitment data on this page is for reference only.

Q2: Does the price include shipping?
A: No. Our prices do not include shipping. Please contact us on WhatsApp (+86 156 3802 2858) for the latest price, and the freight will be confirmed with you on WhatsApp after you place the order, before anything is charged for delivery.

Q3: What warranty and returns do I get?
A: Core injectors carry a 6-month warranty (wear parts 3 months). Defective or wrong items can be returned or exchanged within 15 days of receipt; refunds are processed within 7 business days after inspection.