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Technical Specification
PRODUCT NUMBER 10909N17820N17972N19112N30584-OS31231N32669N33071N33194N33291N17813N18929N19005N30233N31282N
Voltage 121212121212121212121224121212
Design PMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRDDPLGRPMGRDD
Manufacturer BoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBosch
Power 1.42.01.71.11.72.02.01.12.21.21.76.63.01.40.8
Rotation CWCCWCCWCWCWCCWCWCWCWCWCCWCWCWCWCW
Teeth 1010109111099109101213119

Q 1. Which Bosch OE starter motors does the WAI 18253N replace?

A. The WAI 18253N replaces Bosch original-equipment starters across 164 cross-referenced part numbers, including Bosch 0 001 402 040, Bosch 0 001 402 053, Bosch 0 001 410 044, Bosch 0 001 410 116, Bosch 0 001 411 016, Bosch 0 001 414 008 and Bosch 0 001 416 009, among many others. Use the selection widget or search our cross-referenced catalogue by OEM number to confirm your exact reference, or ask Simon. Every fitment shown is backed by our Fit Guarantee.

Q 2. Which engines and machines does this starter motor fit?

A. This unit covers six Aifo engine applications, including the Aifo M32 S, M32 SD, M42 S, M52 S, M62 S and MZ42 S-OM — all from the 1980–1983 period. Use the selection widget to match your specific engine variant, or search our catalogue by machine model to confirm fitment. Our Fit Guarantee backs every application listed.

Q 3. What are the key electrical and mechanical specs of the 18253N?

A. The WAI 18253N operates at 24V with an output of 5.4kW, clockwise rotation, and an 11-tooth pinion, built to the Bosch 416 Series DD design. It is supplied brand new — no exchange or core return is required.

Q 4. Is this part covered by your Fit Guarantee?

A. Yes. Every vehicle and OE cross-reference shown for this part is checked against manufacturer data and backed by our Fit Guarantee. If it is not right, our Fit Guarantee or hassle-free returns have you covered.

Q 5. Can I ask questions about this product before ordering?

A. Yes — ask Simon, or WhatsApp our team on 07754 288583 with any questions about specifications, suitability, or compatibility.

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