Seat Leon Fuel Pump: Specs, Fitment & Common Faults
On the Leon, the fuel pump primes when the driver's door opens, not just the ignition — a genuinely distinct diagnostic clue, plus why running low on fuel can damage the pump itself.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — fuel pumps (aftermarket) Astemo 133134 / Hella 8TF 358 304-911
| Fuel pumps / feed units (aftermarket) | Astemo 133134 (feed unit, diesel); Astemo 2503134 (feed unit, diesel); Astemo 2503292 (feed unit, diesel); Hella 8TF 358 304-911 (feed unit with sender, diesel, two plugs 4-pin and 3-pin); Ridex 1382F0207 (feed unit with sender, diesel, 5 bar, two plugs, 12 V); ERA 775299A (feed unit, 4 bar / 110 l/h, 5-pin); ERA 775547A (feed unit, 5 bar / 190 l/h, 7-pin); ERA 770202A (pump module, 4 bar / 140 l/h, 12 V) |
|---|---|
| Types & variants | Two diesel feed unit families are listed under Astemo (134 and 292 suffixes), with Hella and Ridex 1382F0207 as complete 5 bar two-plug diesel modules with sender and swirl pot (Topran 630 679 is the same type with pre-filter and lever sensor). The petrol side is covered by the 4 bar / 110 l/h 5-pin units (ERA 775299A) and the 5 bar / 190 l/h 7-pin unit (ERA 775547A) for the higher-output TSI engines. Metzger 2250381 is a 5 bar in-tank assembly. Energy G10092 and ESEN SKV 02SKV277 are bare MPI cartridges with filter for fitting into the existing housing. |
| Genuine (OE) numbers quoted | 1K0 919 051M (Kamoka 8400010); ERA 775299A lists repair kit 775299 |
| Fitment notes | The 1.6 and 2.0 TDI use the two-plug diesel module with the sender built in, while petrol TSI cars use a 4-5 bar single-plug module, so the fuel type decides the part. The Cupra 2.0 TSI needs the higher-flow 7-pin unit. A bare cartridge can go into the old housing on petrol cars where the sender still works. |
A Genuinely Useful Diagnostic Clue: The Door-Opening Prime — Seat Leon Fuel Pump
A genuinely useful, specific diagnostic detail worth knowing: on this shared VW Group platform, the in-tank fuel pump is designed to prime briefly the moment the driver's door is opened, not only when the ignition is turned to "on" — you can often hear a faint whine from the rear of the car for a couple of seconds right after opening the door. If you don't hear this at all, it's worth checking the door control module and door sensor before assuming the fuel pump itself has failed — a known failure point on related VW Group models is exactly this module failing to detect the door opening, which also tends to show up as the interior light not coming on and the door-open buzzer not working, giving you a useful way to confirm whether this is genuinely the cause.
Seat Leon Fuel Pump: A Part That Fails at the Worst Possible Moments
Rather than failing conveniently while parked, this component on the Seat Leon tends to give up mid-journey, which is about the worst possible moment. Learning to recognise the early symptoms is the best defence against being caught out.
Seat Leon Fuel Pump: Watch: Replacing It
MQB diesel in-tank pump, same as Leon 5F
Seat Leon Fuel Pump: What It Does
The Seat Leon's fuel pump function — pulling fuel from the tank and pressurising it for the engine — is straightforward, but its usual location isn't: it sits submerged inside the tank itself, which is precisely why access for replacement is more work than the part's size suggests.
Seat Leon Fuel Pump: Generations & Engines: Fuel Pump Type
| Mk1/1M (1999–2005), 1.4/1.6 petrol & TDI diesel | Spans both diesel (in-tank lift pump plus an engine-mounted high-pressure pump) and petrol (in-tank low-pressure pump, plus a separate high-pressure pump if direct-injection) variants — confirm your exact engine before ordering |
|---|---|
| Mk1/1M Cupra/Cupra R (2002–2005), 1.8T petrol (BAM) | Petrol: typically a single in-tank low-pressure pump; some later or higher-output variants may add a separate engine-mounted high-pressure pump for direct injection — confirm your exact engine |
| Mk2/1P (2005–2012), Cupra 2.0 TFSI | Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump |
| Mk3/5F (2012–2020), FR 1.4 TSI petrol | Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump |
| Mk3/5F (2012–2020), Cupra 280/300 2.0 TSI (CJXA/CJXC) | Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump |
| Mk3/5F, 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 |
| Mk4 (2020–present), 1.5 TSI petrol | Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump |
| Mk4 Cupra Leon (2020–present), 2.0 TSI | Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump |
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Seat Leon 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 Seat Fuel Pump
The same part, covered across other Seat models.