Parts for your 2013 Subaru Exiga-Fuel cap

2013 Subaru Exiga fuel cap — purpose, care, and when to replace

Based on Subaru’s technical literature for the YA-series Exiga (model year 2013) — including the Owner’s Manual guidance to tighten the cap until it “clicks,” and the fuel system diagrams in Subaru’s service/parts catalogues showing a tethered, ratcheting screw-type filler cap with an elastomer seal — this vehicle absolutely uses a fuel cap. Regulatory requirements for sealed evaporative emissions systems (as applied to vehicles of this era in markets aligned with ADR/Euro standards and typical NZ compliance) also necessitate a proper cap. So the fuel-cap is relevant and fitted on the 2013 Subaru Exiga.

The fuel cap on a 2013 Subaru Exiga does more than just cover the filler neck. It seals the tank to keep petrol vapours contained, supports the EVAP system so the car meets emissions rules, and stops dust, water, and road grime from getting into the fuel. The Exiga’s cap is a tethered, ratcheting design: after refuelling, it should be turned until it clicks, so the O-ring compresses correctly without over-tightening. That click is the cap’s built-in clutch protecting the seal and filler neck.

As part of routine servicing, it’s smart to give the cap a quick once-over. Wipe the sealing surface on the filler neck, check the cap’s O‑ring for cracks, flattening, or swelling, and make sure the tether isn’t frayed. If there’s a persistent fuel smell around the rear quarter, the cap is hard to tighten, or the check-engine light pops up with small EVAP leak codes after a fill at the servo, the cap is a prime suspect.

• Common signs it’s time to replace the cap:
  • Fuel odour near the car after parking
  • Visible damage or a hardened, cracked O-ring
  • EVAP-related fault codes soon after refuelling
  • Cap won’t “click” or won’t stay tight

When replacing, choose a cap specified for the Exiga’s model year to ensure the venting, seal hardness, and ratchet mechanism match the EVAP system. Avoid universal caps that don’t list Subaru compatibility. Fitment is straightforward: switch the ignition off, open the fuel door, unscrew the old cap, inspect and clean the filler neck, lightly wipe the new O‑ring with a clean, dry cloth (avoid petroleum jelly), then refit until it clicks. As a habit, pop the cap into the holder on the fuel door while refuelling to keep it clean.

A quick cap inspection at each service (or every 10,000 km) can prevent nuisance warning lights and keep the Exiga running sweet as.

Popular questions about 2013 Subaru Exiga fuel caps

Does the Exiga’s fuel cap affect the check-engine light?
Yes. If the cap isn’t sealing — say the O-ring is cracked or the cap wasn’t clicked home — the EVAP system can log a small leak and trigger the check-engine light, often shortly after refuelling. Reseating or replacing the cap usually clears the issue after a few drive cycles.

How tight should the cap be on a 2013 Exiga?
Tighten until it clicks. The ratchet is designed to give audible clicks when properly seated. If it never clicks or keeps spinning loosely, the ratchet or seal may be worn and the cap should be replaced.

Can any aftermarket cap be used?
Use one that’s specified for the 2013 Exiga or equivalent Subaru applications of the same era. The correct cap has the right venting and seal characteristics. Generic “one-size-fits-all” caps can cause EVAP faults or fuel smells.