Bosch 0986023120 Starter

Bosch 0986023120 Starter

The Bosch 0986023120 Starter is a high‑performance engine starter motor designed for a wide range of commercial and passenger vehicles, including Fiat Ducato, Peugeot Boxer, Citroën Relay, and many others. This component delivers reliable starting power with a robust construction that meets OEM quality standards.

Key Technical Specifications

• Voltage: 12 V DC
• Power Output: 2.5 kW (approximately 3.4 hp)
• Operating Current: Up to 200 A during start-up
• Dimensions: Length 244 mm, Width 120 mm, Height 110 mm (typical for the 2312 series)
• Weight: Approximately 12 kg
• Mounting Type: Flange mount with standard bolt pattern compatible with Bosch 986023120 series
• Temperature Range: -40 °C to +85 °C (industrial grade)
• Seal Type: NPT gasket for water‑tight sealing against the engine block

Design Features and Construction

The starter motor incorporates a high‑strength steel armature and an aluminum housing that dissipates heat efficiently. The internal winding is insulated with a high‑temperature varnish, ensuring longevity even under repeated start cycles. A dual‑stage commutator provides smooth torque delivery, reducing wear on the starter gear.

A key element of this model is its integrated thermal protection circuit. When operating current exceeds safe limits, the circuit automatically reduces voltage to protect both the starter and the vehicle’s electrical system. This feature is essential for heavy‑duty applications where continuous operation can lead to overheating.

Compatibility Overview

The Bosch 0986023120 Starter is engineered to fit a broad spectrum of vehicles, particularly those from the Fiat, Peugeot, Citroën, and Iveco families. Below are representative models that use this starter:

• Fiat Ducato – 250 L, 260 L, 280 L, 300 L, 350 L (MultiJet D 3.0, JTD F1AE0481D, etc.)
• Peugeot Boxer – 2006‑2015 models with 3.0 L diesel engines
• Citroën Relay – HDi 155/160 (3.0 L) and other variants
• Iveco – various commercial vans requiring a 2.5 kW starter
• Other European commercial vehicles – including models with the 2312 series designation

The starter’s flange mounting system and bolt pattern are identical to those used in the Bosch 986023120 series, ensuring a straightforward replacement process for technicians familiar with this family.

Installation Guidelines

1. Disconnect Battery: Ensure the battery is fully disconnected before beginning work to avoid electrical shock or short circuits.
2. Remove Old Starter: Loosen and remove the mounting bolts, then carefully detach the starter from the engine block. Note the position of the wiring harnesses for accurate re‑connection.
3. Prepare New Unit: Apply a thin layer of anti‑seize compound to the mounting surface if recommended by Bosch guidelines. Verify that the gasket is intact and correctly positioned.
4. Mount Starter: Align the flange with the engine block, insert bolts, and tighten in a star pattern to ensure even pressure distribution.
5. Reconnect Wiring: Attach the high‑current harnesses, ensuring secure connections. Use torque specifications provided by Bosch for all electrical terminals.
6. Test Start Functionality: Reconnect the battery and attempt a start. Observe the starter’s operation; it should engage smoothly without excessive noise or vibration.

Maintenance Tips

• Inspect the wiring harness for corrosion every 12,000 km or after exposure to harsh environments.
• Check the mounting bolts periodically; replace any that show signs of fatigue.
• Avoid over‑charging the battery, as excessive voltage can damage the starter’s insulation.
• If the vehicle experiences frequent hard starts, consider inspecting the battery and alternator for adequate output.

Performance Highlights

The 2.5 kW power rating ensures that even large diesel engines can be started reliably under cold or high‑load conditions. The starter’s high current capability reduces the risk of voltage sag during ignition, which is critical for vehicles operating in demanding commercial settings.

Its compact 244 mm length allows installation in tight engine bays without compromising airflow or cooling pathways. The robust steel construction and thermal protection circuit provide a long service life, often exceeding the typical lifespan of OEM starters by up to 30% under normal operating conditions.

Why Choose Bosch 0986023120 Starter?

• OEM Quality: Designed to meet or exceed original equipment specifications for a range of European commercial vehicles.
• Reliability: Proven track record in heavy‑duty applications, with minimal failure rates reported by fleet operators.
• Ease of Replacement: Identical mounting and wiring interfaces to the Bosch 986023120 series simplify installation for technicians.
• Durability: High‑temperature insulation and robust mechanical design resist wear from repeated start cycles.

Conclusion

The Bosch 0986023120 Starter represents a blend of power, reliability, and engineering precision. Whether you are maintaining a fleet of Fiat Ducato vans, Peugeot Boxers, or Citroën Relays, this starter motor delivers the performance needed to keep vehicles running smoothly in demanding environments.