Volkswagen Caddy Fuel Pump: Specs, Fitment & Common Faults

If your Caddy is a diesel, a genuine metal contamination issue in the high-pressure pump can require full fuel system replacement — worth understanding the real cost risk.

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OEM Part Number: confirm via VIN — fuel pumps (aftermarket) Bosch 0 986 580 940 / Pierburg 7.03794.25.0

Accuracy note: Covers the Volkswagen Caddy (2K 2010-2020) as listed in the UK aftermarket catalogues. In-tank fuel pumps are sold two ways: as a complete feed unit (the pump in its swirl pot with the fuel-level sender and float) or as a bare pump that is fitted into the old housing, and petrol and diesel versions are not interchangeable — most diesels have only a low-pressure lift pump in the tank, with the high-pressure pump on the engine. The references below are UK aftermarket catalogue listings for this generation, labelled by brand; genuine numbers are shown only where a listing quotes one. Check fuel type, the plug pin count and whether your car has one sender or two (saddle tanks on 4x4 and some larger cars) against your VIN before ordering.

Fuel pumps / feed units (aftermarket)	Bosch 0 986 580 940 (bare in-tank pump, electric, not for vehicles with gas operation); Bosch 0 986 580 829 (bare in-tank pump, electric); Hella 8TF 358 305-431 (complete feed unit with sender, diesel, 5-pin, fitting by qualified personnel); Hella 8TF 358 106-041 (complete feed unit with sender, 5-pin); Hella 8TF 358 106-361 (feed unit with sender, 5-pin); Pierburg 7.03794.25.0 (feed unit module with sender, 0.5 bar, 12 V, 2 connectors, 123 mm diameter, 272 mm length, a low-pressure diesel-type lift unit); Pierburg 7.05656.47.0 (feed unit module, 5 bar, 12 V, 9.5 A, 43 mm diameter, 205.8 mm length, alternative 7.11775.09.0); Pierburg 7.05656.06.0 (feed unit module, 4 bar, 13.5 V, 9.5 A, 136.5 mm diameter, 227 mm length)
Types & variants	The listings split into low-pressure diesel feed units with sender (Hella 8TF 358 305-431, Pierburg 7.03794.25.0 at 0.5 bar) and 4-5 bar petrol feed units with sender (ERA 775299A, Ridex 1382F0055, Meat & Doria 77007, Pierburg 7.05656.06.0), plus bare in-tank pump inserts (Bosch 0 986 580 940 and 0 986 580 829, Pierburg 7.05656.47.0) that go into the existing swirl-pot housing. A Topran 630 660 external in-line diesel pump (2-pin D-shape connector, without holder) is also listed.
Genuine (OE) numbers quoted	1K0919051AE (Meat & Doria 77007, Kamoka 8400009); 1K0 919 051M (Kamoka 8400010); none quoted for the Bosch, Hella, Pierburg, ERA or Ridex items.
Fitment notes	Diesel Caddys use a low-pressure in-tank lift unit (about 0.5 bar) feeding the engine-driven high-pressure pump, while petrol TSI models need a 4-5 bar feed unit, so the two are not interchangeable. The bare Bosch and Pierburg pump inserts fit into the existing module housing and keep the original fuel gauge sender; the complete feed units replace the sender too, so the sender float arm and pin count (5-pin here) need to match the old unit.

Two Pumps, Two Very Different Failure Patterns — And a Genuine FSI vs TSI Distinction — Volkswagen Caddy Fuel Pump

Modern VW petrol and diesel engines with direct injection use two separate fuel pumps working together: a low-pressure pump inside the tank (accessed from under the rear seat), and a high-pressure pump mounted on the engine itself. A whining noise specifically from the rear seat area points to the in-tank low-pressure pump; hesitation, loss of power, or hard starting points more toward the engine-mounted high-pressure pump instead — correctly identifying which one is at fault matters, since the high-pressure pump is considerably more expensive to replace.

A genuinely important distinction if you have a TSI/TFSI petrol engine: older FSI engines had a well-documented cam follower wear issue that could damage the camshaft and high-pressure pump together — but this specifically does not apply to the later TSI/TFSI engines, which use a different pump and follower design. Don't assume FSI-era advice about mandatory cam follower inspections applies to your TSI-engined car; confirm which engine family you actually have before worrying about a fault that may not be relevant.

If your car is diesel-engined, it's worth knowing about a genuinely serious, documented issue: metal filings (swarf) generated internally within a failing high-pressure pump can contaminate the entire fuel system — injectors, fuel lines, and the tank itself — turning what looks like a straightforward pump replacement into a full fuel system rebuild. Real cases have seen this escalate to repair bills in the thousands once contamination is confirmed throughout the system. If a high-pressure pump has failed on a diesel, insisting on a proper check of the injectors and fuel lines for metal contamination — rather than simply fitting a new pump and hoping for the best — is a genuinely worthwhile precaution, even though it adds to the initial cost.

Before paying for a replacement pump on any engine: never replace a high-pressure fuel pump based on symptoms alone — always confirm via fault codes and live fuel pressure data first (commonly P0087, P2293, P2294, or similar), since several other issues (weak lift pump, clogged filter, failing pressure sensor) can produce very similar symptoms without the expensive pump actually being at fault.

Volkswagen Caddy Fuel Pump: A Part That Fails at the Worst Possible Moments

On the Volkswagen Caddy, this particular failure has a knack for terrible timing, stranding drivers mid-journey instead of giving fair warning while the car's parked up safely. Spotting the early signs early enough is what stands between a routine fix and a roadside breakdown.

Volkswagen Caddy Fuel Pump: Watch: Replacing It

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Generation not stated in title; likely 2K

Volkswagen Caddy Fuel Pump reference plate

Before you buy: fuel pump specifications vary by engine size and fuel type, and petrol/diesel versions are never interchangeable. Always confirm against your VIN before ordering.

Volkswagen Caddy Fuel Pump: What It Does

Getting fuel from tank to engine at the correct combustion pressure is down to the fuel pump, and on the Volkswagen Caddy that pump sits inside the tank, submerged in fuel. That location is exactly why swapping out such a small part is rarely a quick job.

Volkswagen Caddy Fuel Pump: Generations & Engines: Fuel Pump Type

Accuracy note: these are documented patterns by generation and engine family, not a substitute for confirming your exact engine code — always verify against your V5C before ordering, since petrol and diesel pumps are never interchangeable.

2K (2004–2020), 1.4/2.0 TSI petrol	Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump
2K/SB (2004–present), 1.6/2.0 TDI diesel	Diesel: in-tank lift pump feeds a separate engine-mounted high-pressure injection pump (common rail) — never interchangeable with the petrol pump
SB (2020–present), 2.0 TSI petrol	Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump

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Volkswagen Caddy Fuel Pump: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Fuel Pump Guide for symptoms to watch for (including the low-pressure vs high-pressure distinction on direct-injection engines), confirming fitment against your VIN, and OE suppliers worth knowing.

More Volkswagen Fuel Pump

The same part, covered across other Volkswagen models.