Scope and how to read this comparison

• Sources: one published product listing for each part number, taken from the same supplier site.
• What is compared: stated vehicle application, OEM cross-reference numbers, published dimensions, construction materials, supplier-stated replacement intervals and supply options.
• What is not compared: filtration efficiency, dust-holding capacity, airflow resistance, fuel economy and emissions effects. The listings describe these qualitatively, but none of them gives test methods, test conditions or measured values. So these properties can't be compared fairly.
• Supplier statements: where a listing says a filter is "OEM standard", "OEM-grade" or an "OEM-equivalent replacement", we report that as the supplier's description. It is not a third-party certification.

Side-by-side overview

Vehicle application and cross-references

For most buyers, application fit is the main question. The three listings point to different vehicle makes:

• Car PU Air Filter 51775324: the product overview says it is "used for FIAT car air filter", but the FAQ on the same page says "engine air filtration in select GM vehicles". These statements conflict, so buyers should ask the supplier to confirm the exact vehicle models and engines before ordering. The listing does give 12 cross-reference numbers, which can be checked against your own parts catalog.
• Car PU Air Filter 6C169601AA: described as a FORD car air filter and as compatible with Ford models that require PU air filters. The excerpt includes no cross-reference list, so cross-references would need to be requested.
• Car PU Air Filter 1K0129620D: described as compatible with Volkswagen and Audi models that require PU media filters. It has the longest published cross-reference list of the three.

Cross-reference numbers are useful for matching parts. Still, confirm fit against the vehicle manufacturer's part number and the physical dimensions.

Published dimensions

The 51775324 and 6C169601AA listings give height, length and width in millimetres. The 1K0129620D listing gives values of 70, 345 and 135 but states no unit. Ask the supplier to confirm the unit and the measurement points before you compare housing fit. Size alone doesn't show which filter suits an application; each part is made for a specific air box.

Materials and construction

All three listings name polyurethane as a key material, but they describe it in different detail:

• 51775324: "durable polyurethane (PU) material and advanced filtration media"; the media type is not named.
• 6C169601AA: the most specific of the three: "filter paper and PU Glue", with polyurethane listed as the structure material. The listing says the PU frame supports sealing.
• 1K0129620D: "advanced polyurethane materials" for durability, flexibility and sealing; the media type is not named.

If filter media type, media grade or PU formulation matters for your specification, ask for material data sheets for each part number. The listings don't include them.

Replacement interval and performance statements

All three listings give the same supplier-stated replacement interval: about 12,000–15,000 miles. The 6C169601AA listing adds "or per manufacturer schedule". Treat this as general guidance and follow the vehicle manufacturer's maintenance schedule.

The listings also make qualitative claims about dust capture, airflow stability, fuel efficiency and engine protection. The 51775324 page says it has higher dust-holding capacity than "standard filters". However, none of the excerpts gives test standards, test conditions or measured results. These claims therefore can't be compared across the three products, and buyers who need performance data should request test reports.

Supply options and supplier documentation

All three listings say wholesale (bulk) supply and private labeling are available, and the 1K0129620D page also mentions OEM supply. Each page also describes the same service terms: lifetime service with 24/7 support for customers who buy directly from the company. The pages also state that the group is the controlling shareholder and exclusive export company of the Pulan filter machine factory.

Prices, minimum order quantities, lead times and certifications are not given in the source listings. Confirm them directly with the supplier.

Checklist before requesting a quote

1. Confirm the vehicle make, model and engine for each part number. This is especially important for the 51775324, where the listing names both FIAT and GM.
2. Match OEM and aftermarket cross-reference numbers against your catalog. For the 6C169601AA, ask for a cross-reference list.
3. Confirm the dimension units and tolerances, especially for the 1K0129620D.
4. Ask for material and media data sheets and any filtration test reports.
5. Agree packaging, private label requirements, quantities and delivery terms in writing.

To compare the Car PU Air Filter 51775324 with these alternatives using full technical documentation, contact Hebei Leiman filter material Co., Ltd. and request the data for the part numbers relevant to your market.