What spark plugs does a 2021 Outback use?
2.5 L: NGK DILKAR7Q8. 2.4 L: NGK SILKFR8A6.
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In-depth guide
2021 Subaru Outback
2021 Outback spark plugs are NGK DILKAR7Q8 on the 2.5 L and NGK SILKFR8A6 on the 2.4 L. No gap is printed.
| Item | Figure |
|---|---|
| 2.5 L | DILKAR7Q8 (NGK). |
| 2.4 L | SILKFR8A6 (NGK). |
Source: owner's manual / last verified 2026-10-16 (Owner's manual publication A2600BE-B, file MSA5M2104B, copyright 2020, edited 2020/10/1. Subaru's manual index lists A2600BE-B as the 2021 Outback book. The same PDF also describes the Legacy. (opens in a new tab)).
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: Owner's manual publication A2600BE-B, file MSA5M2104B, copyright 2020, edited 2020/10/1. Subaru's manual index lists A2600BE-B as the 2021 Outback book. The same PDF also describes the Legacy. (opens in a new tab), Subaru Corporation, published 2020-10-01, read 2026-10-16.
| Item | Figure | Where it comes from |
|---|---|---|
| 2.5 L | DILKAR7Q8 (NGK). | Electrical system, spark plugs |
| 2.4 L | SILKFR8A6 (NGK). | Electrical system, spark plugs |
2.5 L is DILKAR7Q8. 2.4 L is SILKFR8A6. Both are NGK.
None was printed.
None was printed.
The electrical-system table names the plugs. It does not print a gap or a torque. Oil is on the oil guide.
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Part
NGK DILKAR7Q8 spark plug
Listed for 2.5 L models.
2021 Outback spark plugs (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)As an Amazon Associate I earn from qualifying purchases.
Part
NGK SILKFR8A6 spark plug
Listed for 2.4 L models.
2021 Outback 2.4 L plugs (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)As an Amazon Associate I earn from qualifying purchases.
2.5 L: NGK DILKAR7Q8. 2.4 L: NGK SILKFR8A6.
It is not printed in the electrical-system table, so it is not stated.
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These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.
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