Denso 234-4521 Replacement: Compare 2 Options

Carmaker's part vs aftermarket: the 234-4521

234-4521 is a Denso cross-reference number. 2 brands sell a oxygen sensor listed as its replacement, including Denso, DrCax.

• Carmaker's own part: sold under the carmaker or its parts brand (for example Toyota, Motorcraft, ACDelco or Mopar). Usually the highest price.
• Aftermarket parts: made by other companies to the same size and fit, often sold under an interchange number such as a Fram, Timken or Standard Motor number. Usually cheaper; materials and build quality vary by brand.
• Before you buy: check that the listing names your vehicle's year, make, model and engine, and compare it with your old part.