2021 Mercedes-Benz LO 916

The 2021 Mercedes-Benz LO 916 is a light-duty truck, typically configured as a chassis cab for various commercial applications such as delivery, service, or utility vehicles. One common engine option is a 4.8L inline-4 diesel engine producing around 156 horsepower and 580 Nm of torque. Transmission options commonly include a 6-speed manual. Owners appreciate the LO 916’s reliability, fuel efficiency, and maneuverability in urban environments. However, some have expressed concerns about parts availability and the overall cost of maintenance compared to other commercial vehicles.

Engine

4.8L Inline-4 Diesel

• Fuel Injector Failure
  • Description/Symptoms: Rough idling, decreased fuel economy, black smoke from the exhaust, engine misfires, or difficulty starting.
  • Solution: Replacing the faulty fuel injectors.
  • Estimated Cost to Fix: $500 - $1500+
• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine bay, loss of power, excessive oil consumption, or the engine going into limp mode.
  • Solution: Replacing the turbocharger unit.
  • Estimated Cost to Fix: $1200 - $3000+

Transmission

6-Speed Manual

• Clutch Failure
  • Description/Symptoms: Clutch slipping, difficulty shifting gears, unusual noises when pressing the clutch pedal, or a burning smell.
  • Solution: Replacing the clutch disc, pressure plate, and potentially the flywheel.
  • Estimated Cost to Fix: $800 - $2000+
• Synchro Wear
  • Description/Symptoms: Grinding noise when shifting into specific gears, particularly when cold. Difficulty engaging or disengaging certain gears.
  • Solution: Replacing the worn synchros within the transmission. In some cases, a transmission rebuild or replacement is necessary.
  • Estimated Cost to Fix: $1000 - $3000+

Suspension

• Leaf Spring Sagging or Breakage
  • Description/Symptoms: Vehicle sitting lower on one side, uneven tire wear, poor ride quality, or visible cracks or breaks in the leaf springs.
  • Solution: Replacing the affected leaf springs. Replacing in pairs is recommended.
  • Estimated Cost to Fix: $400 - $1000+ per spring
• Worn Shock Absorbers
  • Description/Symptoms: Excessive bouncing after bumps, poor handling, increased body roll during cornering, and longer stopping distances.
  • Solution: Replacing the worn shock absorbers.
  • Estimated Cost to Fix: $200 - $600+

Electrical

• Sensor Failure (ABS, Wheel Speed)
  • Description/Symptoms: ABS warning light illuminated, traction control malfunction, speedometer issues, or engine performance problems.
  • Solution: Diagnosing the specific faulty sensor and replacing it.
  • Estimated Cost to Fix: $150 - $400+
• Wiring Harness Issues
  • Description/Symptoms: Intermittent electrical problems, such as lights flickering, sensors malfunctioning, or starting problems. Often related to corrosion or damage to wiring connectors.
  • Solution: Inspecting and repairing or replacing the affected section of the wiring harness.
  • Estimated Cost to Fix: $200 - $1000+ depending on severity

Exterior

• Corrosion/Rust (Frame)
  • Description/Symptoms: Visible rust forming on the frame, especially in areas exposed to road salt. Can lead to structural weakness over time.
  • Solution: Rust removal, treatment with rust inhibitor, and potentially welding reinforcement in severe cases.
  • Estimated Cost to Fix: $300 - $3000+ depending on severity
• Light Malfunctions (Headlights, Taillights)
  • Description/Symptoms: Lights not working or flickering. May be caused by bulb failure, wiring issues, or faulty connectors.
  • Solution: Replacing the bulbs, repairing or replacing the wiring, or replacing the light assembly.
  • Estimated Cost to Fix: $50 - $500+ depending on the issue

Interior

• HVAC Blower Motor Failure
  • Description/Symptoms: Blower motor not working, only working on certain speeds, or making excessive noise.
  • Solution: Replacing the blower motor.
  • Estimated Cost to Fix: $200 - $500+
• Infotainment System Glitches (if equipped)
  • Description/Symptoms: System freezing, crashing, or displaying error messages.
  • Solution: Software update, resetting the system, or replacing the head unit.
  • Estimated Cost to Fix: $100 - $1000+

Recalls None Found

Summary

The 2021 Mercedes-Benz LO 916 generally proves reliable, but common issues revolve around fuel injection, turbocharger and clutch system failures. Electrical problems related to sensors and wiring can also surface, alongside suspension component wear. Frame corrosion presents a potential long-term concern. While individual repair costs range, the overall severity of these issues can vary, potentially leading to substantial repair bills if multiple problems arise.