Protect your acquisition by auditing inventory quality, supplier agreements, customer concentration, and delivery infrastructure before you close.
Acquiring an auto parts distributor in the $1M–$5M revenue range requires rigorous due diligence across five high-risk areas: inventory health, supplier relationships, customer base quality, financials, and operational infrastructure. Unlike many service businesses, auto parts distributors carry significant tangible asset risk — obsolete inventory, aging delivery fleets, and undocumented supplier pricing tiers can each destroy post-acquisition margins. This checklist is designed for strategic acquirers, SBA-backed buyers, and roll-up platforms evaluating independent auto parts distributors in the lower middle market.
Inventory is typically the largest asset on the balance sheet. Understand what you're actually buying before agreeing to any purchase price.
Request a full SKU-level inventory report with last-sale dates and turnover velocity.
Identifies slow-moving or dead stock that inflates asset value and ties up working capital.
Red flag: More than 20% of SKUs show no sales activity in the past 12 months.
Verify inventory valuation method — FIFO, LIFO, or weighted average cost.
Valuation method directly affects cost of goods sold, margins, and tax exposure post-acquisition.
Red flag: Inconsistent valuation methods across years or undocumented cost basis adjustments.
Assess the percentage of non-returnable or non-exchangeable parts in current stock.
Non-returnable obsolete parts represent a write-off risk that reduces net asset value at closing.
Red flag: Seller cannot identify which supplier agreements include return privileges.
Confirm physical inventory count matches the reported book value within an acceptable variance.
Discrepancies between physical and book inventory signal poor controls or prior manipulation.
Red flag: Variance exceeds 5% without a documented explanation or reconciliation record.
Preferred supplier pricing and credit terms are core to distributor margins. Losing them post-close can immediately compress EBITDA.
Obtain copies of all supplier agreements with NAPA, LKQ, Genuine Parts, or other key distributors.
Confirms pricing tiers, credit limits, and whether agreements are assignable to a new owner.
Red flag: Agreements are verbal, informal, or explicitly non-transferable without supplier consent.
Verify the business's current pricing tier and volume rebate thresholds with each major supplier.
Pricing tiers and rebates tied to purchase volume may reset if ownership or volume changes.
Red flag: Rebate income represents more than 10% of gross margin with no transferability guarantee.
Contact key supplier reps to confirm willingness to maintain the relationship post-acquisition.
Personal relationships between supplier reps and the current owner may not survive a transition.
Red flag: Supplier rep expresses hesitation or requires ownership approval from a regional director.
Review open purchase orders, credit balances, and any outstanding supplier disputes or chargebacks.
Undisclosed disputes or chargebacks create hidden liabilities that transfer with the business.
Red flag: Any unresolved chargeback claims or suspended credit accounts with primary suppliers.
Revenue stability depends on how broadly customers are distributed. Concentration in a few accounts is the most common deal-killer in this segment.
Request a customer-by-customer revenue breakdown for the past 3 years.
Reveals concentration risk and whether revenue is growing, stable, or declining across accounts.
Red flag: Any single repair shop or fleet account exceeds 15–20% of total annual revenue.
Identify which customer relationships are owned by the seller personally versus the business.
Owner-dependent relationships are unlikely to transfer, creating churn risk immediately post-close.
Red flag: Top 5 accounts were acquired and are maintained exclusively by the current owner.
Review accounts receivable aging report and assess creditworthiness of top shop customers.
Extended AR aging from repair shops signals collection risk and potential bad debt exposure.
Red flag: More than 15% of receivables are 60+ days past due with no active collection process.
Ask for evidence of service agreements, standing orders, or delivery route commitments with key accounts.
Documented agreements reduce churn risk and support post-acquisition revenue continuity.
Red flag: No written service agreements exist — all customer commitments are informal or verbal.
Lower middle market distributors often carry owner expenses through the business. Verify every add-back before accepting the seller's EBITDA figure.
Obtain 3 years of CPA-reviewed or tax-filed financial statements plus current year interim P&L.
Establishes a reliable earnings baseline and exposes revenue or margin manipulation.
Red flag: Financials are internally prepared only, with no third-party review or tax return corroboration.
Request a detailed EBITDA recast with each add-back itemized, sourced, and documented.
Unsupported add-backs inflate the purchase price and reduce actual post-acquisition cash flow.
Red flag: Add-backs exceed 25% of stated EBITDA without clear documentation or one-time verification.
Analyze gross margin trends by product category and supplier over the past 3 years.
Declining margins in core categories signal pricing pressure or supplier relationship deterioration.
Red flag: Gross margins have declined more than 3 percentage points year-over-year without explanation.
Review owner compensation, related-party transactions, and any personal expenses run through the business.
Personal expenses embedded in operating costs distort true profitability and SBA underwriting.
Red flag: Owner salary is significantly below or above market with no normalization methodology provided.
The physical delivery infrastructure is a capital-intensive asset. Deferred maintenance and expiring leases create immediate post-acquisition capex obligations.
Obtain titles, mileage logs, and maintenance records for every delivery vehicle in the fleet.
Deferred maintenance on delivery vehicles creates near-term replacement costs not reflected in price.
Red flag: Vehicles average over 150,000 miles with no documented preventive maintenance program.
Review warehouse lease terms including rent, remaining term, renewal options, and assignability.
Short lease terms or non-assignable leases disrupt operations and force renegotiation at close.
Red flag: Warehouse lease expires within 18 months with no renewal option or landlord consent required.
Evaluate the inventory management system — software, accuracy, and integration with supplier ordering.
Outdated or manual systems increase fulfillment errors, slow turnover, and compress margins.
Red flag: Inventory is tracked in spreadsheets with no real-time system or supplier EDI integration.
Identify all key non-owner employees, their roles, tenure, and whether they have signed retention agreements.
Loss of experienced drivers or counter staff post-close disrupts delivery routes and customer service.
Red flag: Key delivery or warehouse staff have no contracts and have expressed intent to leave post-sale.
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Inventory is typically purchased at cost — not at retail or inflated book value. Buyers should negotiate an inventory buyout provision in the purchase agreement where a physical count is conducted at or near closing, with agreed-upon discounts applied to slow-moving stock (often 50–75% of cost) and zero value assigned to obsolete or non-returnable parts. SBA lenders will require an independent appraisal if inventory exceeds a material threshold of the total deal value.
Not automatically. Most preferred pricing agreements with major distributors like NAPA, LKQ, and Genuine Parts Company are tied to the entity or individual owner and require formal notification and approval before transferring. Buyers should request written confirmation from each key supplier prior to closing — not just the seller's verbal assurance. Some agreements may require a new application, a probationary pricing period, or a review of the buyer's financial capacity.
Start by mapping each revenue dollar to a relationship owner. If the top five accounts were acquired and are serviced exclusively by the current owner, assume 20–40% churn risk in year one. Require the seller to facilitate introductions to all major accounts during the transition period, and structure a portion of the purchase price as an earnout tied to 12-month revenue retention. The cleanest businesses have documented delivery routes, standing orders, and counter staff who hold the day-to-day customer relationships independently of the owner.
Independent auto parts distributors in the $1M–$5M revenue range typically trade at 2.5x–4.5x trailing twelve-month EBITDA. Businesses at the higher end of that range have diversified customer bases, clean financials, transferable supplier agreements, modern inventory systems, and documented operating procedures. Businesses with high owner dependency, inventory obsolescence risk, or concentration in a few accounts will trade at or below 3.0x. SBA financing is widely available in this segment, enabling buyers to close with 10–15% equity down on qualifying deals.
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