Description

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eAuto Fuel Pump Assembly for Yamaha FZ-S V3 BS4 (Early 2019) | 149cc Air-Cooled FI

The eAuto fuel pump assembly covers the Yamaha FZ-S V3 BS4 — the brief transitional version launched in early 2019 before the full BS6 switchover in November 2019. The FZ-S V3 BS4 updated the styling and chassis over the V2 but introduced a new fuel tank and pump module (OEM: B4G-E3907-00), distinct from both the V2 (2GS) and the BS6 V3 (B9P). This was a short production window — January to October 2019 — but these bikes are still on Indian roads. Every unit is tested for correct fuel pressure output and electrical function before dispatch from eAuto.co.in.

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eAuto Key Specs

149cc Air-Cooled FI | FZ-S V3 BS4 | Jan–Oct 2019 Only | OEM Ref: B4G-E3907-00

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✅ eAuto Verified Fitment — Fits These Models

Model	Year Range	Engine
Yamaha FZ-S V3 BS4	Jan 2019–Oct 2019	149cc, Air-Cooled, SOHC, 2-Valve, FI, BS4, 5-Speed

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⚠️ How to identify if you have a BS4 V3

The FZ-S V3 was sold in BS4 form from January 2019 to October 2019. If your bike was purchased in this window, it is a BS4 V3. Bikes purchased from November 2019 onwards are BS6 models — for those, see the eAuto FZ V3 BS6 listing.

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❌ Does NOT Fit — Do Not Order For These Models

Model	Reason
Yamaha FZ FI V2 / FZ-S FI V2 / FAZER FI V2 (2014–2018)	V2 platform uses a different pump (OEM: 2GS-E3907-00) — eAuto makes a separate assembly
Yamaha FZ V3 BS6 / FZ-S V3 BS6 (Nov 2019–Present)	BS6 platform uses a different pump (OEM: B9P-E3907-00) — eAuto makes a separate assembly
Yamaha FZ-X (2021–Present)	FZ-X uses the BS6 pump (B9P) — not compatible with this BS4 assembly
Yamaha FZ 25 / FZ 250 / FAZER 250 (249cc)	Completely different 249cc engine — separate fuel pump