BOSCH SEAT-AT993X-E17-0281002123 Crankshaft Position Sensor 0031537428

( Brand: Bosch ), ( Manufacturer Part Number: SEAT-AT993X-E17-0281002123 ), ( Part Type: Crankshaft Sensor ), ( Ipn: 0031537428 ), ( Manufacturer Warranty: 1 Year ), ( Oe/oem Part Number: Eh0268, 235-1299 Eh0268 0148990042 )

Review BOSCH Mercedes 0281002123 Oe Genuine Crankshaft Position Sensor fits W129 W140 W202

The **Bosch Seat AT993X-E17-0281002123** is a high-performance, OE-quality crankshaft position sensor specifically engineered for Mercedes-Benz models within the **W129 (1930 1942), W140 (1949 1957), and W202 (1967 1972)** series, including iconic vehicles like the 300SL Gullwing, 300SE Coup , and 280SL Roadster. This sensor is a critical component of the engine s ignition and fuel injection systems, providing precise real-time data on the crankshaft s rotational position and speed to the engine control unit (ECU). Crafted from durable, corrosion-resistant materials, the Bosch AT993X-E17 ensures long-term reliability under demanding conditions, whether in classic race applications, restoration projects, or daily driving scenarios. Its robust construction features a sealed, waterproof housing and a high-precision inductive pickup, delivering accurate and consistent signals even in high-vibration environments ideal for engines with aggressive camshaft profiles or modified performance setups. The sensor s direct replacement compatibility with the original **0281002123** part number guarantees an exact fit, eliminating the need for modifications or adapters, while its OE-level performance ensures seamless integration with the vehicle s original wiring harness and mounting points. Whether restoring a vintage Mercedes to its former glory or upgrading an existing system for enhanced reliability, the Bosch Seat AT993X-E17 stands as a trusted choice, blending precision engineering with the durability required to withstand decades of use.

**Pros and Cons of buying a Bosch Seat-AT993X-E17-0281002123 Crankshaft Position Sensor for Mercedes W129/W140/W202 (0281002123)**

1. **High Quality and Reliability** Bosch is a well-known manufacturer of automotive sensors, known for durability and precision. This sensor is designed to meet or exceed OEM specifications, ensuring accurate crankshaft position readings, which are critical for engine performance and fuel injection timing.

2. **Direct OEM Replacement** The part number (0281002123) matches the original equipment sensor for these Mercedes-Benz models, reducing the risk of compatibility issues. It should fit seamlessly without requiring modifications.

3. **Compatibility with Common Issues** The W129, W140, and W202 models (e.g., 300SE, 500SE, 560SL) are known for crankshaft position sensor failures, often causing rough idling, stalling, or check engine lights (P0335 or similar codes). A genuine or high-quality aftermarket sensor like this one can resolve these problems effectively.

4. **Ease of Installation** The sensor is a direct bolt-on replacement, requiring no special tools or expertise beyond basic mechanical skills. Most mechanics or even experienced DIYers can install it in under an hour.

5. **Long-Term Performance** Bosch sensors are engineered for longevity, especially when installed correctly. Proper installation (clean mounting surface, secure bolts, and proper grounding) can prevent premature failure.

6. **Warranty Coverage** Bosch offers warranties on many of its sensors, providing peace of mind against defects. Some retailers or online sellers may also offer extended warranties or return policies.

7. **Cost-Effective Solution** While not the absolute cheapest option, it strikes a balance between price and quality. Replacing a faulty sensor is far less expensive than dealing with engine damage caused by prolonged misfires or timing issues.

---

1. **Price** Bosch sensors are premium-priced compared to generic or no-name brands. For enthusiasts or those on a tight budget, this may be a significant upfront cost, though it often justifies the investment in the long run.

2. **Potential Counterfeit Risks** If purchasing from untrusted sellers (e.g., unlicensed online marketplaces or gray-market dealers), there is a risk of receiving a counterfeit or low-quality knockoff. Always buy from reputable sources with return policies.

3. **Installation Challenges** While the sensor itself is straightforward, accessing it may require removing engine covers, brackets, or other components, especially in older Mercedes models with tight engine bays. Rust or seized bolts could complicate installation.

4. **Compatibility with Modified Engines** If the engine has been heavily modified (e.g., turbocharged, forced induction, or aftermarket ECU tuning), the sensor may not perform optimally without additional tuning or calibration. However, for stock or mildly modified engines, this is unlikely to be an issue.

5. **Sensor Lifespan Depends on Conditions** Like all sensors, this one can fail prematurely if exposed to extreme heat, oil leaks, or electrical interference. Regular maintenance (checking for leaks, ensuring clean connections) can mitigate this risk.

6. **Diagnostic Work Required** Before purchasing, it s essential to confirm that the issue is indeed a faulty crankshaft position sensor. Symptoms like rough idling, stalling, or check engine lights could also indicate other problems (e.g., ignition coils, fuel injectors, or wiring issues). A scan tool or professional diagnosis is recommended.

7. **Limited Availability in Some Regions** Depending on where you live, Bosch sensors may not be as readily available as generic alternatives. Shipping times or stock issues could delay repairs.

---

The **Bosch Seat-AT993X-E17-0281002123 crankshaft position sensor** is a **strong, reliable choice** for Mercedes W129, W140, and W202 models, particularly if you prioritize quality, longevity, and compatibility with OEM standards. Its pros high reliability, ease of installation, and direct replacement fit outweigh the cons for most users, provided the sensor is the actual cause of the issue and is sourced from a trusted vendor.

However, if budget is a major concern, **generic or brand-name alternatives** (e.g., ACDelco, Denso, or OE-quality sensors from reputable sellers like RockAuto, Amazon, or local auto parts stores) may offer comparable performance at a lower cost. Always verify the part number and seller reputation before purchasing.

---

1. **Confirm the Diagnosis** Use an OBD-II scanner to check for **P0335 (Crankshaft Position Sensor Circuit Malfunction)** or related codes. If the issue persists after testing other components (e.g., ignition coils, wiring), proceed with the replacement.

2. **Purchase from a Trusted Source** Buy directly from **Bosch s official website, authorized dealers, or well-reviewed retailers** (e.g., Amazon, RockAuto, local Mercedes specialists). Avoid unknown sellers to prevent counterfeit parts.

3. **Prepare for Installation**

- Have a **socket set, torque wrench, and clean rag** ready.

- Ensure the **mounting surface is clean** (remove old gasket material or corrosion).

- **Torque the sensor securely** (typically 20 30 Nm, check your service manual for exact specs).

- **Clear any error codes** after installation and test-drive the vehicle to confirm the issue is resolved.

4. **Consider Additional Maintenance**

- Inspect the **sensor wiring and connectors** for damage or corrosion.

- Check for **oil leaks** near the sensor, as oil contamination can cause premature failure.

- If the engine has high mileage, consider **upgrading related components** (e.g., ignition coils, fuel injectors) for long-term reliability.

5. **Budget Alternative (If Needed)** If the Bosch sensor is out of budget, **high-quality generic sensors** (e.g., **Denso 45430-01001** or **ACDelco 12R1303**) are often just as reliable and may be available at a lower price. Always ensure the part number matches your vehicle s requirements.

**Final Verdict:** For most Mercedes W129/W140/W202 owners dealing with crankshaft position sensor issues, the **Bosch sensor is the safest and most durable option**, justifying its cost. If cost is a major factor, a **reputable generic alternative** can be a practical substitute. Always prioritize quality over price to avoid repeated failures.

Details:

Oil Cooler, Lines Parts. Hoods / Supports. For Mercedes W129 W140 W202 OE GENUINE Crankshaft Position Sensor: Brand New Sensor. Item Not As , 3.

Door Handles - inside. Engine Electrical. Window Regulators / Switches.

Tailgate Handles. Window Motors. COMBINE SHIPPING discount is valid only for purchase items and pay in full at the same time. Radiator Fans Motors.

Interior Switches. Belts and Pensioners. Engine Transmission Mounts. Sensors - Engine Management.

Fuel Delivery System. Warranty would be one time replacement. Power Steering Pumps Parts. Confirm the item will install and operate properly before use or modification.

Side Mirrors Rear View Mirror. Part Number: ,EH0268,235-1299, EH0268 Fitment: 1992 1993 Mercedes-Benz 300SE, 1997 - 1998 C230, 1999 CL5 1998 - 1999 CL6 1996 - 1997 E3 1996 E320, 1997 E420, 1997 - 1999 S320, 1996 - 1999 S420, S5 S6 SL320, 1996 - 1998 SL5 1996 2002 SL6 1998 SLK230 Warranty: 1 Year unlimited miles. Heat Air Conditioning Parts. Lighting / Harness.

Interior Parts. Door Lock Actuators. Windshield Washer System. Pre-sale Inquiry, 5.

Ignition Coils Distributors. Door Handles - outside. Air Filters Intake Manifolds. Engine Mechanical.

Ball Joints Control Arms. Driveshafts Parts.

part #: seat-at993x-e17-0281002123 prices

• $57.90-$69.00

specifications cranshafengin:

• for models: W129, W140, W202
• for makes: Mercedes
• brand: Bosch
• mpn: Seat-at993x-e17-0281002123
• part type: Crankshaft Sensor
• ipn: 0031537428
• manufacturer warranty: 1 Year
• oe/oem part number: Eh0268, 235-1299 Eh0268 0148990042

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: New

seller cranshafengin:

• rating: 99.5%
• city: Deerfield Beach, Florida
• # reviews: 44858

returns cranshafengin:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

shipping cranshafengin:

• class: Economy
• type: Fixed
• cost: $0.00
• service: Economy
• transit: 4-9 Days

payments cranshafengin:

• credit card: Discover
• wallet: Apple-pay
• other

offer cranshafengin:

• availability: In Stock
• quantity: 4
• options: Ship-to-home
• started: February 24, 2026
• sold: 0

Bosch SEAT-AT993X-E17-0281002123 Is Similar To:

• 0232103040 Bosch New Rpm Sensor 3165143381595 (19.5% similar) Shipping labels may only be applied to a separate, outer box. Vehicles sold outside of the USA may be different, even if they have same make and model name...(September 2nd, 2017)
• 0261210001 Bosch New Crank Position 3165141861167 (29.1% similar) Shipping labels may only be applied to a separate, outer box. Vehicles sold outside of the USA may be different, even if they have same make and model name...(December 30th, 2017)
• 0261210002 Bosch For Bmw Actual Part Camshaft Position Sensor (42.4% similar) Actual oe part camshaft position sensor by Bosch. This premium product is the best way to go for those looking highest quality replacement that offers supreme levels of quality, performance and reliability...(October 11th, 2018)
• 0261210018 Bosch Oe Mercedes Crankshaft Position Sensor (52.4% similar) New old stock...(September 3rd, 2018)
• 0261210030 Bosch New Saab Crankshaft (26.2% similar) Cores: any cores must be in rebuild able condition with sufficient parts to rebuild said core rust, corrosion, OK. Discounted shipping and combined is available on our web site. Assuming it cost and is only available to the USA. Turbo all 4CYL not virgin. Fitment please see the compatibility's ...(November 9th, 2017)
• 0261210107 Bosch New Engine Crankshaft 03165142836775 (29.6% similar) Shipping labels may only be applied to a separate, outer box. Vehicles sold outside of the USA may be different, even if they have same make and model name...(December 24th, 2017)
• 0261210141 Bosch Crankshaft Pulse Sensor Fits Smart Mercedes Cabrio (29.5% similar) Part: 0031539528 prices...(December 16th, 2018)
• 0261210158 Land Rover Discovery Ii Crankshaft Position Sensor Shield Bosch (40.4% similar) Any miscalculations upon re installation, electrical, motor issues, etc. Box APO FPO. Please review the pictures carefully and read condition area for specifics. Might affect the performance of part. Please review the pictures to see exact condition of items...(January 31st, 2019)
• 0261210190 Bosch New Crankshaft Position Sensor Audi (42.2% similar) Assuming it cost Europa's. Items are not returnable if they in the original sealed container packaging. Discounted shipping and combined is available on our web site. Cores: any cores must be in rebuild able condition with sufficient parts to rebuild said core rust, corrosion, OK. Fitment ...(September 23rd, 2018)
• 0261210261 Bosch New Vw Crankshaft Position Sensor Touareg (41.9% similar) The price is as it states on. For some heavier items shipping starts at Europa's. No further shipping discounts or savings are available on those items. Cores: any cores must be in rebuild able condition with sufficient parts to rebuild said core rust, corrosion, OK. Fitment information may not be ...(March 5th, 2018)
• 0261210292 Bosch New Porsche Crankshaft Position Sensor Cayenne (45.3% similar) Some items on are significantly discounted off our regular retail price. More detailed information is available in the compatibility's section above. Fitment information may not be available for all products. Discounted shipping and combined is available on our web site. The price is as it states on...(May 26th, 2018)