2021 Mercedes-Benz Boxer OF

The 2021 Mercedes-Benz Sprinter (Boxer OF likely refers to a specific configuration or upfit of the Sprinter van) is a popular choice for commercial use and camper van conversions, known for its versatility and reliability. While specific configurations like the “Boxer OF” may have unique upfit-related issues, the underlying Sprinter platform has common problem areas. Engine options for the 2021 Sprinter include a 2.0L Turbocharged 4-cylinder diesel (around 188 hp and 325 lb-ft of torque) and a 3.0L Turbocharged V6 diesel (around 188 hp and 325 lb-ft of torque). The 2.0L gasoline engine (around 188 hp and 258 lb-ft of torque) is also available. All engines are typically paired with a 9-speed automatic transmission. Owners generally appreciate the Sprinter’s spacious interior and payload capacity, but some dislike its relatively high price point and potential maintenance costs.

Engine

2.0L Turbocharged 4-cylinder Diesel

• Fuel Injector Failure
  • Description/Symptoms: Rough idling, misfires, reduced power, check engine light. Potential fuel leak.
  • Solution: Replacement of faulty fuel injector(s).
  • Estimated Cost to Fix: $500 - $1500+ (depending on the number of injectors and labor).
  • Recalls: None Found
• EGR Valve Issues
  • Description/Symptoms: Check engine light, poor engine performance, excessive smoke, reduced fuel economy.
  • Solution: Cleaning or replacement of the EGR valve.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

3.0L Turbocharged V6 Diesel

• Oil Cooler Leaks
  • Description/Symptoms: Oil leaks, often dripping onto the engine or ground. Can lead to low oil levels and potential engine damage.
  • Solution: Replacement of the oil cooler and related seals.
  • Estimated Cost to Fix: $1200 - $2500+ (labor intensive repair).
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Loss of power, excessive black smoke, unusual noises from the turbocharger area.
  • Solution: Replacement of the turbocharger.
  • Estimated Cost to Fix: $2500 - $4500+
  • Recalls: None Found

Transmission

9-Speed Automatic Transmission

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or delayed shifts, particularly between certain gears. Hesitation when accelerating.
  • Solution: Software update, transmission fluid flush, or valve body replacement in severe cases.
  • Estimated Cost to Fix: $200 (software) - $2000+ (valve body).
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibrations at certain speeds, especially during light acceleration.
  • Solution: Torque converter replacement.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

Suspension

• Rear Leaf Spring Sagging (Especially with Heavy Upfits)
  • Description/Symptoms: Rear of the van sitting lower than normal, reduced ride quality, bottoming out over bumps.
  • Solution: Replacement of the leaf springs with heavier-duty options or addition of helper springs.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Electrical

• Sensor Failures (Various)
  • Description/Symptoms: Malfunctioning sensors (e.g., O2 sensor, ABS sensor, etc.) can trigger warning lights and affect vehicle performance.
  • Solution: Diagnosis and replacement of the faulty sensor.
  • Estimated Cost to Fix: $150 - $500+ per sensor.
  • Recalls: None Found
• Glow Plug Issues (Diesel Engines)
  • Description/Symptoms: Hard starting, especially in cold weather, check engine light.
  • Solution: Replacement of faulty glow plug(s) and/or glow plug control module.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Exterior

• Sliding Door Problems
  • Description/Symptoms: Difficulty opening or closing the sliding door, sticking, or unusual noises.
  • Solution: Adjustment of door alignment, lubrication of hinges and rollers, or replacement of damaged components.
  • Estimated Cost to Fix: $100 - $1000+ (depending on the severity and parts needed).
  • Recalls: None Found

Interior

• HVAC Malfunctions
  • Description/Symptoms: Inconsistent airflow, temperature control problems, or failure of the blower motor.
  • Solution: Diagnosis and repair or replacement of faulty HVAC components.
  • Estimated Cost to Fix: $200 - $1000+ (depending on the issue).
  • Recalls: None Found

Summary

The 2021 Mercedes-Benz Sprinter, while generally reliable, does have some common issues. Diesel engines, particularly the V6, can be prone to oil cooler leaks and turbocharger problems, which can be costly to repair. Transmission issues, such as rough shifting, are also reported. Electrical gremlins, sensor failures, and suspension issues, especially with heavy upfits, are other areas to be aware of. Overall, while some repairs can be relatively inexpensive, others can run into the thousands of dollars, making it crucial to thoroughly inspect a used Sprinter and consider a pre-purchase inspection.