Description
Starter BOSCH with code 28100-0Q021 is designed for Citroën C1 and Peugeot 107 vehicles equipped with the 1.0 engine.
Product Overview
This high-quality starter motor from Bosch is a direct-fit replacement for Citroën C1 and Peugeot 107 1.0 petrol models. Engineered to meet OEM specifications, it restores reliable cranking and fast engine start-up. The unit is compatible with original mounting points and electrical connectors used on the 1.0i versions of these compact cars, making it suitable for both professional workshops and competent DIY mechanics.
Key Benefits
- Direct OEM-compatible fit for Citroën C1 and Peugeot 107 1.0i.
- Reliable Bosch construction ensures long service life and consistent engagement.
- Simple swap: compatible with original plug and main battery cable.
- Commonly searched by OE code 28100-0Q021 and alternative references 5802AN / 5802AZ / 5802AL / 5802EY.
Technical Information
- Manufacturer: Bosch
- Model: Citroën C1; Peugeot 107 (1.0)
- Product Codes: 28100-0Q021
- Other Numbers: 5802AN, 5802AZ, 5802AL, 5802EY
Installation Recommendations
Follow a cautious, step-by-step approach to ensure safe and correct replacement:
- Always disconnect the negative battery terminal before starting work to prevent short circuits.
- Raise and safely support the vehicle if under-car access is required; use jack stands on level ground.
- Locate the starter at the transmission bell housing area. Access may be from below or through the engine bay depending on vehicle setup.
- Label and disconnect all electrical connections: battery cable to the starter stud and the solenoid signal connector.
- Remove the mounting bolts and extract the starter. Compare part numbers and physical design before installation.
- Fit the new starter, tighten mounting bolts securely, reconnect electrical connectors and battery. Start the engine to verify correct operation.
- After installation, check for unusual noises (grinding or whining) and ensure charging system/battery voltage is within nominal range.
Why This Part Commonly Fails
Starter failure on small 1.0 petrol engines is usually caused by a combination of mechanical wear and electrical stress. Typical causes include:
- Worn brushes and commutator wear leading to poor electrical contact and weak cranking.
- Solenoid failure or intermittent contacts preventing reliable pinion engagement.
- Oil contamination from engine or gearbox leaks that degrades bearings and brush seats.
- Excessive cranking due to weak battery or poor charging system, accelerating wear.
- Damaged ring gear teeth causing grinding or failed engagement.
Practical Tips For Diagnosis
- Differentiate between a dead battery and starter fault: weak cranking or clicking usually indicates battery/connection issues; grinding or no engagement points to starter or flywheel problems.
- Always check battery condition, terminal corrosion, and earth straps before condemning the starter.
- Inspect the starter pinion and flywheel ring gear for wear or damage when the unit is removed.
Suitability And Compatibility
Ideal for Citroën C1 and Peugeot 107 equipped with the 1.0 petrol engine. Frequently searched by the OE code 28100-0Q021 and cross-referenced with codes 5802AN, 5802AZ, 5802AL, 5802EY. Ensure the part code matches the original unit fitted to the vehicle before ordering.
