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Technical Specification
PRODUCT NUMBER 10909N17820N17972N19112N30584-OS31231N32669N33071N33194N17813N18929N19005N30233N31282N33130N
Voltage 121212121212121212122412121212
Design PMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRPMGRDDPLGRPMGRDDPMGR
Manufacturer BoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBoschBosch
Power 1.42.01.71.11.72.02.01.12.21.76.63.01.40.81.1
Rotation CWCCWCCWCWCWCCWCWCWCWCCWCWCWCWCWCCW
Teeth 10101091110991010121311913

Q 1. Does this starter motor replace DENSO 428000-4110 and other DENSO units?

A. Yes. The WAI 33291N is cross-referenced against five DENSO original-equipment part numbers: DENSO 428000-4110, DENSO 428000-4111, DENSO 428000-4112, DENSO 428000-4113 and DENSO 428000-4114. In total there are 10 OE references across BOSCH and DENSO for this part. Use the selection widget or search our cross-referenced catalogue by OEM number to confirm it matches your existing unit.

Q 2. Which BOSCH part numbers does the WAI 33291N cross-reference?

A. It replaces BOSCH original-equipment starter motors referenced as BOSCH 0 001 107 448, BOSCH 0 001 107 449, BOSCH 0 001 107 530, BOSCH 0 001 107 531 and BOSCH F 004 A94 449 — five BOSCH references in all, alongside five DENSO numbers, giving 10 OE cross-references in total.

Q 3. Will this starter motor fit a Toyota Corolla or Toyota Auris?

A. The WAI 33291N covers 11 Toyota applications, including the Toyota Auris (2007–2012), Toyota Corolla _E15_ (2008–2013), Toyota Corolla (2007–2012), Toyota RAV4 Mk3 (2008–2015) and Toyota Yaris II (2006–2011). Use the selection widget to match your exact model and engine variant, or search our catalogue by OEM number. Every fitment shown is backed by our Fit Guarantee.

Q 4. What engine variants of the Toyota Corolla and Auris does this starter fit?

A. Fitment covers specific engine variants within the Toyota Corolla and Auris ranges across those model years. To confirm your exact engine code is included, use the selection widget on the listing or search our cross-referenced catalogue by your existing OEM starter number. If your variant is not listed, ask Simon.

Q 5. Is this a remanufactured unit or brand new?

A. This is a brand-new starter motor — not remanufactured or reconditioned. It is supplied ready to fit without requiring any core return or exchange.

Q 6. What does PMGR design mean and why does it matter?

A. PMGR stands for Permanent Magnet Gear Reduction. It uses permanent magnets instead of wound field coils and incorporates a gear reduction drive, which reduces the motor's physical size and weight while maintaining strong cranking torque. The WAI 33291N replicates the OE PMGR design for a direct, like-for-like replacement.

Q 7. What are the key electrical and mechanical specifications?

A. The WAI 33291N operates at 12V, delivers 1.2kW of output power, rotates clockwise (CW) and uses a 9-tooth pinion. It is designed to BOSCH PMGR specification and carries Lester numbers 31255 and 33291.

Q 8. How do I confirm this part fits my vehicle or machine?

A. Use the selection widget to match your make, model and engine, or search our cross-referenced catalogue by OEM number, machine model or equivalent part across brands. If your vehicle is not listed, ask Simon. Every fitment shown is backed by our Fit Guarantee.

Q 9. 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.

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