When glow plug performance matters, the DENSO DG-621 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Voltage [V]: Copper, Copper V, Connector type: Pin, Cone Pitch: 93, Thread Size: M9x1.0, Overall Length [mm]: 119 mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with ALFA ROMEO, CHEVROLET, CHRYSLER, CITROËN and 7 other makes vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 0100266031, 0 250 403 014, 062900090304, 1214090 and 24 more. Matching these numbers confirms a like-for-like replacement with no loss of function. DENSO is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.

DENSO Corporation, founded in 1949 in Kariya, Japan, is one of the largest automotive component manufacturers in the world and a core member of the Toyota Group. DENSO specialises in spark plugs, alternators, starters, air conditioning systems, fuel pumps, and oxygen sensors. As the OE supplier to Toyota, Honda, Subaru, and many European manufacturers, DENSO products are built to exact original specifications. Choosing DENSO means factory-grade quality with Japanese precision engineering and global reliability.