Find a fuse

Vauxhall Astra · 2021

2021 Vauxhall Astra Heated Seat Fuse

Heated seats not warming up? Find the fuses Vauxhall lists for seat heating — some depend on whether the car has an alarm horn.

  • UK specification
  • Verified data
  • Checked 15 October 2026
  • Sources

Partly covered: Vauxhall’s November 2021 Astra handbook prints no fuse chart (a defective fuse must be replaced by a workshop). The chart below is from the August 2020 edition and applies only to cars that came with that handbook.

Quick answer

Verified

Vauxhall’s handbook doesn’t print fuse ratings, so none is shown. Fit a replacement with the same rating as the fuse you remove — the handbook says: “Data on the replacement fuse must match the data on the defective fuse.”

Rear seat heating (only for vehicles without alarm horn)

Fuse
1
Fuse box
Instrument panel
Location
Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

Seat heating (only on vehicles without alarm horn)

Fuse
13
Fuse box
Instrument panel
Location
Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

Front seat heating (on vehicles with alarm horn)

Fuse
12
Fuse box
Load compartment
Location
The fuse box is located on the left side of the load compartment behind a cover.

Rear seat heating (on vehicles with alarm horn)

Fuse
13
Fuse box
Load compartment
Location
The fuse box is located on the left side of the load compartment behind a cover.

Where is the fuse box?

Instrument panel fuse box

Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

  1. Pull the cover on the left side to remove.
  2. After having changed defective fuses, close the fuse box cover:
  3. 1. Apply the cover on the right side.
  4. 2. Fold the left side of the cover forwards.
  5. Take care that the securing clamp is guided as shown in the illustration.

Load compartment fuse box

The fuse box is located on the left side of the load compartment behind a cover.

  1. Remove the cover.
  2. Disengage the fuse box cover and remove it.
  3. After having changed defective fuses, close the fuse box cover and press until it engages.

Fuse box diagram

Full 2021 Vauxhall Astra fuse chart
Instrument panelCarFixData schematic
Instrument panel fuse box: map of 37 fuse positions, fuse 1 and 13 highlighted23456789101112141516171819202122232425262728293031323334353637113
These fusesOther fuse positionsNot usedOur own schematic, drawn from the fuse positions printed in Vauxhall’s handbook illustration of this fuse box. Not to scale and not a manufacturer drawing — always match the number on the fuse box before pulling a fuse.
Load compartmentCarFixData schematic
Load compartment fuse box: map of 22 fuse positions, fuse 12 and 13 highlighted12345678910111415161718192021221213
These fusesOther fuse positionsNot usedOur own schematic, drawn from the fuse positions printed in Vauxhall’s handbook illustration of this fuse box. Not to scale and not a manufacturer drawing — always match the number on the fuse box before pulling a fuse.

Where to look

  • 1

    Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

    Fuse · Rear seat heating (only for vehicles without alarm horn)

    Highlighted on the instrument panel map.

  • 13

    Instrument panel (Vauxhall: “The fuse box is located behind a cover.”).

    Fuse · Seat heating (only on vehicles without alarm horn)

    Highlighted on the instrument panel map.

  • 12

    The fuse box is located on the left side of the load compartment behind a cover.

    Fuse · Front seat heating (on vehicles with alarm horn)

    Highlighted on the load compartment map.

  • 13

    The fuse box is located on the left side of the load compartment behind a cover.

    Fuse · Rear seat heating (on vehicles with alarm horn)

    Highlighted on the load compartment map.

The map shows where each fuse sits. Always confirm the number against the legend on the fuse box cover before pulling anything.

How to replace the fuse safely

  1. Switch off the ignition and all electrical equipment. Take the key out, or move a keyless fob away from the car.
  2. Open the fuse box and find the fuse using the number on the cover legend or the chart on this page.
  3. Pull the fuse straight out with the plastic fuse puller (usually clipped inside the fuse box) or fine-nose pliers.
  4. Look at the metal strip inside the fuse. A broken or burnt strip means it has blown.
  5. Fit a new fuse with exactly the same amperage rating. The number on top and the colour should match.
  6. Refit the cover, switch on and test the component.
  • Never fit a fuse with a higher amperage rating than specified. It can let wiring overheat.
  • Never bridge a fuse with wire, foil or anything else.

Fuse keeps blowing?

A fuse that blows again straight away is doing its job. Something on that circuit is drawing too much current. Common causes are damaged wiring shorting to the bodywork, a failing motor or socket, water getting in, or a faulty accessory. Fitting fuse after fuse, or a bigger fuse, won’t fix the fault and can overheat the wiring. Have the circuit tested by an auto electrician.

Not the fuse? Check these next.

  • One seat or both?

    If only one seat has failed, its own fuse, switch or heating pad is the likely cause.

  • Connector under the seat

    The seat wiring plugs in under the seat. Sliding the seat can strain or loosen this connector.

  • Heating element

    Elements can break inside the cushion, often where you kneel or slide in and out of the car.

Sources & verification

Status
Verified
Specification
UK market
Last checked
15 October 2026

Fuse layouts can differ between trim levels and optional equipment. Always confirm against the legend on your fuse box.