In-Tank Fuel Pump HART 521 333
Fuel Feed Unit HART 521 333. Fits 15 car models (SEAT, VW), 1981–2014. Replaces 4 OE numbers.

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Specification. From the manufacturer's data.
- Brand
- HART
- Operating Pressure [bar]
- 4 bar
- Flow rate [l/h]
- 135 l/h
- Category
- Fuel Feed Unit
- MPN
- 521 333
- SKU
- 5251-521 333
- GTIN / EAN
- 5901219426450
- What's included
- 1x Fuel Feed Unit
OE numbers. The originals this part replaces.
Numbers the vehicle makers and other brands use for this part. Only a confirmed OE number links to its own page; other brands' equivalents are under “Equivalent products”.
- AUDI / SEAT / SKODA / VAG / VW6N0919051N
- AUDI / SEAT / SKODA / VAG / VW6N0919051R
- AUDI / SEAT / SKODA / VAG / VW6N0919087F
- AUDI / SEAT / SKODA / VAG / VW6N0919673B
Where this part fits
Original-fit position for OE 6N0919051R.

Compatible cars. SEAT, VW, 15 models.
Matched from the manufacturer's data. Production years 1981–2014.
| Model | Engines | Years |
|---|---|---|
| SEAT5 models | ||
| SEAT CORDOBA (6K1, 6K2) | 1.4 16V, 1.6 i, 1.8 T 20V Cupra | 1993–2002 |
| SEAT CORDOBA (6L2) | 1.4 16V | 2002–2009 |
| SEAT CORDOBA Vario (6K5) | 1.4 16V | 1996–2002 |
| SEAT IBIZA II (6K1) | 1.0 16V, 1.4 16V, 1.8 T 20V Cupra | 1993–2002 |
| SEAT IBIZA III (6L1) | 1.4 16V | 2002–2009 |
| VW10 models | ||
| VW POLO (6N2) | 1.0, 1.4, 1.4 16V, 1.6 16V GTI | 1999–2001 |
VW9 more models
| Model | Engines | Years |
|---|---|---|
| VW POLO CLASSIC (86C, 80) | 1.0, 1.3 Cat | 1985–1994 |
| VW POLO Coupe (86C, 80) | 1.0 Cat, 1.3, 1.3 Cat | 1981–1994 |
| VW POLO Hatchback Van (86CF) | 1.0 | 1992–1994 |
| VW POLO II (86C, 80) | 1.0 Cat, 1.3, 1.3 Cat | 1981–1994 |
| VW POLO III (6N1) | 120 1.6 16V GTI, 45 1.0, 55 1.3, 75 1.6 | 1994–1999 |
| VW POLO III CLASSIC (6V2) | 100 1.6, 60 1.4, 75 1.4 16V, 75 1.6 | 1995–2009 |
| VW POLO IV (9N, 9A) | 1.2, 1.2 12V, 1.4 16V | 2001–2014 |
| VW POLO Van Hatchback Van (6N1) | 1.0 | 1994–1999 |
| VW POLO Variant (6V5) | 1.4, 1.4 16V, 1.6 | 1997–2001 |
Always verify compatibility with your vehicle before ordering.
More about this part. Related categories and similar parts.
HART
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Common OE numbers for this part
Common original equipment numbers linked to replacement-part pages.
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2-year warranty against manufacturing defects on all parts, counted from delivery. 14-day money-back guarantee if the part doesn't fit your vehicle. Delivery terms
We ship from the EU to 201 countries. Deliveries within the EU carry no customs charges; outside the UK and the EU, the destination country may charge import duties and taxes, paid on delivery. Delivery times and prices by country
Delivery times to EU countries (working days)
Austria 4–7, Belgium 4–7, Bulgaria 5–9, Croatia 5–9, Cyprus 4–19, Czechia 4–7, Denmark 4–8, Estonia 3–4, Finland 6–10, France 5–8, Germany 3–5, Greece 6–10, Hungary 4–7, Ireland 5–9, Italy 5–9, Latvia 2–3, Lithuania 2–3, Luxembourg 4–7, Malta 4–9, Netherlands 4–7, Poland 3–6, Portugal 6–10, Romania 4–8, Slovakia 4–7, Slovenia 4–8, Spain 6–9, Sweden 5–10