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OE Reference Cross-Match
Explore top-quality 523st21 available online at Carbus24. Browse genuine OEM and certified aftermarket replacement parts with guaranteed vehicle fitment, competitive prices, fast worldwide shipping, and premium customer service.
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STARTCAR · Aftermarket
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SITECH · Genuine
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Price on RequestBMW · Genuine
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Price on RequestSCANIA · Genuine
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Price on RequestBMW · Genuine
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Price on RequestBMW · Genuine
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MEAT & DORIA · Aftermarket
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102.83 USD
DENSO · Aftermarket
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288.67 USDCOFLE · Aftermarket
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5.77 USDSNRA · Aftermarket
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Price on RequestAS-PL · Aftermarket
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Price on RequestSERA · Aftermarket
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OPTIMAL · Aftermarket
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MEAT & DORIA · Aftermarket
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SEM LASTIK · Aftermarket
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LUCAS · Aftermarket
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EUROTEC · Aftermarket
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RESTAGRAF · Aftermarket
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SEM LASTIK · Aftermarket
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Price on RequestProfessional Parts · Aftermarket
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FEBI BILSTEIN · Aftermarket
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AUTOELECTRO · Aftermarket
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CDX · Aftermarket
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CEVAM · Aftermarket
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FARE SA · Aftermarket
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MAPCO · Aftermarket
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SIGAM · Aftermarket
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OSSCA · Aftermarket
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DRI · Aftermarket
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MAPCO · Aftermarket
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TMI · Aftermarket
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CASCO · Aftermarket
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POLMO · Aftermarket
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ELSTOCK · Aftermarket
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Price on RequestWhy Customers Choose CarBus24
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Cross-referenced parts are cataloged as fitting the same application but are not guaranteed to be identical to the original manufacturer part. Verify fitment against your OE number or VIN before ordering.
Reference/cross-reference numbers vary by engine, transmission, chassis and production date — not by number alone. Before ordering, compare your original OE number against 523ST21 number by STARTCAR listed above, and check the dimensions or specifications against your original part.
If you’re unsure, contact CarBus24 with your VIN or the number printed on your original part and we’ll confirm the correct match before you order.
| OE (SACHS, Ford, Mazda) | Aftermarket (FAST, Valeo, LUK, Exedy) |
|---|---|
| Matches original manufacturer specification | Cross-referenced to the same application |
| Typically higher price | Typically lower price |
| Direct OE part number | Equivalent fit, different part number |
Compare your original OE number against the OE Reference Numbers listed above, and check the dimensions or specifications against your original part.
OE parts match the original manufacturer specification. Aftermarket parts are cross-referenced to fit the same application, usually at a lower price.
Yes — select your vehicle from the sidebar to see parts confirmed to fit your car.
Send us your VIN or the number printed on your original part and our team can confirm the correct match before you order.
