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Bosch SR4245N Starter
| Brand | Bosch SR4245N |
|---|---|
| Voltage | 12 |
| Design | Permanent magnet gear reduction |
| Family | Pmgr |
| Power Rating | 1.5 |
| Mounting Bolt Hole Quantity | 1 |
| Mounting Flange to End of Case | 39.8 |
| Mounting Flange to Pinion End at Rest | 7.4 |
| Case Grounding | Grounded case |
| Nose Cone Material | Aluminum |
| Nose Cone Type | Closed nose |
| Starter Rotation | Clockwise (right) |
| Mounting Hardware Included | No |
| Mounting Shims Included | No |
| Solenoid Attached | Yes |
| Housing Material | Aluminum |
| Re-Clockable Flange | No |
| Tooth Quantity | 11 |
| Mounting Type | Flange |
| Over-Crank Protection | No |
| Designed for Automatic Start / Stop Operation | Yes |
| Automotive Item Weight (lbs) | 6.172943 lb |
| New Or Remanufactured | New |
| Product Length | 7.204724 in |
| Product line | Starter (New) |
| Fits | Mazda · 39 vehicles |
OE-style replacement. New Bosch starter built for direct-fit starting-system service.
PMGR design. Permanent magnet gear reduction helps deliver efficient cranking performance.
Integrated solenoid. Flange-mount starter with grounded case and aluminum construction.
Cross-references PY0118400 for the same application. See all 1.
Starter for Mazda Applications
This Bosch new starter, part number SR4245N, is built for 12-volt starting systems and uses a permanent magnet gear reduction design. It is a direct-fit starter for select Mazda vehicles, including Mazda 3, Mazda 3 Sport, Mazda 6, CX-5, CX-30, and CX-50 applications.
- Permanent magnet gear reduction design for efficient cranking performance
- 12-volt new starter with integrated solenoid attached
- Grounded case construction with aluminum housing and aluminum nose cone
- Clockwise rotation with 11-tooth drive gear
- Designed for automatic start/stop operation
Detailed Product Overview
Bosch SR4245N is a new starter from the Bosch Starter (New) line, engineered as a PMGR unit for consistent starting performance in compatible Mazda platforms. The grounded case, closed nose, and flange-mount design support a clean OE-style installation, while the aluminum housing helps keep the assembly compact. This starter is listed for 2014-2023 Mazda 3 Sport and CX-5, 2014-2021 Mazda 3 and Mazda 6, 2020-2021 Mazda CX-30, and 2023 Mazda CX-50 applications.
This part cross-references PY0118400 for the same application.
Common Replacement Reasons
- Slow or inconsistent engine cranking
- No-start condition caused by starter failure
- Intermittent engagement from worn starter components
- Starting issues on vehicles equipped with automatic start/stop operation
Installation Notes
Verify voltage, rotation, mounting style, and tooth count before installation. This starter uses a flange mount, includes a solenoid, and does not include mounting hardware or shims. Confirm the vehicle’s original starter configuration matches the listed fitment before replacement.
Quality Assurance
Bosch Premium Starters are designed, built, and tested for performance and reliability. SR4245N is a new unit, not remanufactured, and is built to Bosch manufacturing standards for starting-system service.
| Year | Make | Model | Drive Type | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 2023 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2023 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2023 | Mazda | CX-50 | — | 2.5L | L4 | Starter (New) |
| 2022 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2022 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2021 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2021 | Mazda | 3 Sport | FWD | 2.5L | L4 | Starter (New) |
| 2021 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2021 | Mazda | CX-30 | — | 2.5L | L4 | Starter (New) |
| 2021 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2020 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2020 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2020 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2020 | Mazda | CX-30 | — | 2.5L | L4 | Starter (New) |
| 2020 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2019 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2019 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2019 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2019 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2018 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2018 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2018 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2018 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2017 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2017 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2017 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2017 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2016 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2016 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2016 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2016 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2015 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2015 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2015 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2015 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
| 2014 | Mazda | 3 | — | 2.5L | L4 | Starter (New) |
| 2014 | Mazda | 3 Sport | — | 2.5L | L4 | Starter (New) |
| 2014 | Mazda | 6 | — | 2.5L | L4 | Starter (New) |
| 2014 | Mazda | CX-5 | — | 2.5L | L4 | Starter (New) |
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