The H is the Astra built 2004–2010. The registration's age identifier is the quickest check: 04 to 60 plate. The V5C gives the first-registration date, and this generation's fitments apply from the first 2004 cars onwards up to the 2010 run-out.
Dip beam (low)H7VerifiedHalogen cars H7; xenon (AFL) variants D2S projector. micksgarage lists H7 spare kits for Astra H.
Main beam (high)H1VerifiedUK 448. Halogen cars H1 main / H7 dip. Xenon cars: D2S dip with H7 main beam (agmvision).
Front fogH3VerifiedUK 453. H3 on standard UK cars (autobeam + agmvision agree); H11 only on VXR/OPC. Autodoc lists H11 generically but is variant-blind.
Sidelight / DRLW5WVerifiedUK 501, in headlamp. No dedicated DRL on Astra H. Autobeam and agmvision agree with birnen-typ.
Front indicatorPY21WVerifiedUK 581, amber. Autobeam confirms birnen-typ. agmvision claims H21W on halogen-headlamp cars (minority claim, not seen elsewhere).
Rear indicatorPY21WVerifiedLens-dependent: PY21W amber bulb behind clear lens (hatch; Hella/Abakus hatch lamp specs list PY21W); P21W clear bulb behind amber lens on some variants (autobeam lists P21W). Check lens colour.
Brake / tailP21WVerifiedSeparate P21W (382) brake and P21W tail bulbs, NOT P21/5W: agmvision lists brake P21W + rear position P21W, and no Hella/Abakus/TYC lamp-unit spec names P21/5W or W16W. Some facelift hatch clusters add W5W.
ReverseP21WVerifiedUK 382. agmvision and autobeam confirm birnen-typ. Autobeam also offers W16W option (likely later models); no other source supports W16W for Astra H.
Rear fogP21WVerifiedUK 382. Autobeam and agmvision confirm birnen-typ.
Number plateW5WVerifiedUK 501. Autobeam and agmvision confirm birnen-typ. Autodoc also lists C5W but is variant-blind.
Driver side22"Verified550mm. Bosch Aerotwin A931S set (550/450) listed for Astra Mk V hatch.
Passenger side18"Verified450mm.
Rear12"Verified300mm rear blade on 5-door hatch; second source is an alca 22/18/12 set listing for Astra H 2004-2010 (weaker). Estate/GTC rear may differ.
ConnectorSide pinVerifiedFront arms are 22mm side-pin (Bosch A931S side-lock/side-pin). Rear uses a different dedicated Vauxhall rear-arm fitting.